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Full vulnerability report · 2020
CVE-2020-1752High confidence

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out

GNU Libc · glibc

7.0HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

2 current
SSA-398330 · CSAF 2.0 · revision 18 · interimSiemens ProductCERTSSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5
5 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
  • SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)
  • SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)
  • SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Summary
A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.
Remediation
Update to V3.1.5 or later version
SSA-831302 · CSAF 2.0 · revision 5 · interimSiemens ProductCERTSSA-831302: Vulnerabilities in the BIOS of the SIMATIC S7-1500 TM MFP before V1.3.0
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • SIMATIC S7-1500 TM MFP - BIOS
Summary
A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.
Remediation
Update to V1.3.0 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2020-12583

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

What

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

What

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation without authentication after a user interaction. If successful, the issue may execute code or commands in the affected security context.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
local access → Use After Free → execute code or commands in the affected security context
Attack surface
Local
Privileges required
None: unauthenticated exploitation is possible
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
After compromise, an attacker may use built-in shells, scripting engines, scheduled tasks and native network utilities for discovery, persistence or movement. This is a plausible LoTL path, not evidence that it has occurred for every attack.
UnauthenticatedRemote code executionCWE-416
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-1432Siemens SIMATIC S7: Mehrere Schwachstellen

Ein Angreifer aus dem angrenzenden Netzwerk oder ein entfernter, anonymer, authentisierter, physischer oder lokaler Angreifer kann mehrere Schwachstellen in Siemens SIMATIC S7 ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand herbeizuführen, seine Privilegien zu erweitern und Daten zu manipulieren.

Official advisory
BSI · German · WID-SEC-W-2024-1186IBM DB2 REST: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM DB2 REST ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory
BSI · German · WID-SEC-W-2022-1748GNU libc: Schwachstelle ermöglicht Privilegieneskalation

Ein lokaler Angreifer kann eine Schwachstelle in GNU libc ausnutzen, um seine Privilegien zu erhöhen.

Official advisory
CERT-FR · French · CERTFR-2026-AVI-0218Multiples vulnérabilités dans les produits VMware

cord?id=CVE-2019-2708 Référence CVE CVE-2019-9076 https://www.cve.org/CVERecord?id=CVE-2019-9076 Référence CVE CVE-2020-10029 https://www.cve.org/CVERecord?id=CVE-2020-10029 Référence CVE CVE-2020-10543 https://www.cve.org/CVERecord?id=CVE-2020-10543 Référence CVE CVE-2020-10878 https://www.cve.org/CVERecord?id=CVE-2020-10878 Référence CVE CVE-2020-11023 https://www.cve.org/CVERecord?id=CVE-2020-11023 Référence CVE CVE-2020-12723 https://www.cve.org/CVERecord?id=CVE-2020-12723 Référence CVE CVE-2020-12762 https://www.cve.org/CVERecord?id=CVE-2020-12762 Référence CVE CVE-2020-16599 https://www.cve.org/CVERecord?id=CVE-2020-16599 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-19726 https://www.cve.org/CVERecord?id=CVE-2020-19726 Référence CVE CVE-2020-22916 https://www.cve.org/CVERecord?id=CVE-2020-22916 Référence CVE CVE-2020-27618 https://www.cve.org/CVERecord?id=CVE-2020-27618 Référence CVE CVE-2020-29562 https://www.cve.org/CVERecord?id=CVE-2020-29562 Référence CVE CVE-2020-2981 https://www.cve.org/CVERecord?id=CVE-2020-2981 Référence CVE CVE-2021-20197 https://www.cve.org/CVERecord?id=CVE-2021-20197 Référence CVE CVE-2021-20205 https://www.cve.org/CVERecord?id=CVE-2021-20205 Référence CVE CVE-2021-20266 https://www.cve.org/CVERecord?id=CVE

Official advisory
CERT-FR · French · CERTFR-2025-AVI-1057Multiples vulnérabilités dans les produits VMware

rd?id=CVE-2017-7501 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2019-12900 https://www.cve.org/CVERecord?id=CVE-2019-12900 Référence CVE CVE-2019-14844 https://www.cve.org/CVERecord?id=CVE-2019-14844 Référence CVE CVE-2019-17498 https://www.cve.org/CVERecord?id=CVE-2019-17498 Référence CVE CVE-2019-18276 https://www.cve.org/CVERecord?id=CVE-2019-18276 Référence CVE CVE-2019-25013 https://www.cve.org/CVERecord?id=CVE-2019-25013 Référence CVE CVE-2019-25162 https://www.cve.org/CVERecord?id=CVE-2019-25162 Référence CVE CVE-2020-10029 https://www.cve.org/CVERecord?id=CVE-2020-10029 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-22218 https://www.cve.org/CVERecord?id=CVE-2020-22218 Référence CVE CVE-2020-22916 https://www.cve.org/CVERecord?id=CVE-2020-22916 Référence CVE CVE-2020-27618 https://www.cve.org/CVERecord?id=CVE-2020-27618 Référence CVE CVE-2020-28196 https://www.cve.org/CVERecord?id=CVE-2020-28196 Référence CVE CVE-2020-29562 https://www.cve.org/CVERecord?id=CVE-2020-29562 Référence CVE CVE-2021-20227 https://www.cve.org/CVERecord?id=CVE-2021-20227 Référence CVE CVE-2021-20266 https://www.cve.org/CVERecord?id=CVE-2021-20266 Référence CVE CVE-2021-24031 https://www.cve.org/CVERecord?id=C

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

d?id=CVE-2020-14779 Référence CVE CVE-2020-14781 https://www.cve.org/CVERecord?id=CVE-2020-14781 Référence CVE CVE-2020-14782 https://www.cve.org/CVERecord?id=CVE-2020-14782 Référence CVE CVE-2020-14792 https://www.cve.org/CVERecord?id=CVE-2020-14792 Référence CVE CVE-2020-14796 https://www.cve.org/CVERecord?id=CVE-2020-14796 Référence CVE CVE-2020-14797 https://www.cve.org/CVERecord?id=CVE-2020-14797 Référence CVE CVE-2020-14798 https://www.cve.org/CVERecord?id=CVE-2020-14798 Référence CVE CVE-2020-14803 https://www.cve.org/CVERecord?id=CVE-2020-14803 Référence CVE CVE-2020-15095 https://www.cve.org/CVERecord?id=CVE-2020-15095 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-18032 https://www.cve.org/CVERecord?id=CVE-2020-18032 Référence CVE CVE-2020-18781 https://www.cve.org/CVERecord?id=CVE-2020-18781 Référence CVE CVE-2020-21599 https://www.cve.org/CVERecord?id=CVE-2020-21599 Référence CVE CVE-2020-21605 https://www.cve.org/CVERecord?id=CVE-2020-21605 Référence CVE CVE-2020-21606 https://www.cve.org/CVERecord?id=CVE-2020-21606 Référence CVE CVE-2020-22218 https://www.cve.org/CVERecord?id=CVE-2020-22218 Référence CVE CVE-2020-22916 https://www.cve.org/CVERecord?id=CVE-2020-22916 Référence CVE CVE-2020-25663 https://www.cve.org/CVERecord?id=C

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0756Multiples vulnérabilités dans les produits VMware

d?id=CVE-2020-14869 Référence CVE CVE-2020-14870 https://www.cve.org/CVERecord?id=CVE-2020-14870 Référence CVE CVE-2020-14873 https://www.cve.org/CVERecord?id=CVE-2020-14873 Référence CVE CVE-2020-14888 https://www.cve.org/CVERecord?id=CVE-2020-14888 Référence CVE CVE-2020-14891 https://www.cve.org/CVERecord?id=CVE-2020-14891 Référence CVE CVE-2020-14893 https://www.cve.org/CVERecord?id=CVE-2020-14893 Référence CVE CVE-2020-15358 https://www.cve.org/CVERecord?id=CVE-2020-15358 Référence CVE CVE-2020-15366 https://www.cve.org/CVERecord?id=CVE-2020-15366 Référence CVE CVE-2020-16156 https://www.cve.org/CVERecord?id=CVE-2020-16156 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-1971 https://www.cve.org/CVERecord?id=CVE-2020-1971 Référence CVE CVE-2020-22916 https://www.cve.org/CVERecord?id=CVE-2020-22916 Référence CVE CVE-2020-2570 https://www.cve.org/CVERecord?id=CVE-2020-2570 Référence CVE CVE-2020-2572 https://www.cve.org/CVERecord?id=CVE-2020-2572 Référence CVE CVE-2020-2573 https://www.cve.org/CVERecord?id=CVE-2020-2573 Référence CVE CVE-2020-2574 https://www.cve.org/CVERecord?id=CVE-2020-2574 Référence CVE CVE-2020-2577 https://www.cve.org/CVERecord?id=CVE-2020-2577 Référence CVE CVE-2020-2579 https://www.cve.org/CVERecord?id=CVE-2020-2579

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0442Multiples vulnérabilités dans les produits IBM

De multiples vulnérabilités ont été découvertes dans les produits IBM. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, un déni de service à distance et une atteinte à la confidentialité des données.

Official advisory
CERT-FR · French · CERTFR-2023-AVI-1015Multiples vulnérabilités dans les produits Siemens

ecord?id=CVE-2020-13871 Référence CVE CVE-2020-14145 https://www.cve.org/CVERecord?id=CVE-2020-14145 Référence CVE CVE-2020-14422 https://www.cve.org/CVERecord?id=CVE-2020-14422 Référence CVE CVE-2020-15358 https://www.cve.org/CVERecord?id=CVE-2020-15358 Référence CVE CVE-2020-15523 https://www.cve.org/CVERecord?id=CVE-2020-15523 Référence CVE CVE-2020-15778 https://www.cve.org/CVERecord?id=CVE-2020-15778 Référence CVE CVE-2020-15801 https://www.cve.org/CVERecord?id=CVE-2020-15801 Référence CVE CVE-2020-1712 https://www.cve.org/CVERecord?id=CVE-2020-1712 Référence CVE CVE-2020-1751 https://www.cve.org/CVERecord?id=CVE-2020-1751 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-19185 https://www.cve.org/CVERecord?id=CVE-2020-19185 Référence CVE CVE-2020-19186 https://www.cve.org/CVERecord?id=CVE-2020-19186 Référence CVE CVE-2020-19187 https://www.cve.org/CVERecord?id=CVE-2020-19187 Référence CVE CVE-2020-19188 https://www.cve.org/CVERecord?id=CVE-2020-19188 Référence CVE CVE-2020-19189 https://www.cve.org/CVERecord?id=CVE-2020-19189 Référence CVE CVE-2020-19190 https://www.cve.org/CVERecord?id=CVE-2020-19190 Référence CVE CVE-2020-19909 https://www.cve.org/CVERecord?id=CVE-2020-19909 Référence CVE CVE-2020-21047 https://www.cve.org/CVERecord?id=C

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0453Multiples vulnérabilités dans les produits Siemens

rt-portal.siemens.com/productcert/html/ssa-968170.html Bulletin de sécurité Siemens ssa-975766 du 13 juin 2023 https://cert-portal.siemens.com/productcert/html/ssa-975766.html Référence CVE CVE-2016-10228 https://www.cve.org/CVERecord?id=CVE-2016-10228 Référence CVE CVE-2018-13405 https://www.cve.org/CVERecord?id=CVE-2018-13405 Référence CVE CVE-2018-25032 https://www.cve.org/CVERecord?id=CVE-2018-25032 Référence CVE CVE-2018-4834 https://www.cve.org/CVERecord?id=CVE-2018-4834 Référence CVE CVE-2019-25013 https://www.cve.org/CVERecord?id=CVE-2019-25013 Référence CVE CVE-2020-10029 https://www.cve.org/CVERecord?id=CVE-2020-10029 Référence CVE CVE-2020-1752 https://www.cve.org/CVERecord?id=CVE-2020-1752 Référence CVE CVE-2020-27618 https://www.cve.org/CVERecord?id=CVE-2020-27618 Référence CVE CVE-2020-29562 https://www.cve.org/CVERecord?id=CVE-2020-29562 Référence CVE CVE-2021-20269 https://www.cve.org/CVERecord?id=CVE-2021-20269 Référence CVE CVE-2021-27645 https://www.cve.org/CVERecord?id=CVE-2021-27645 Référence CVE CVE-2021-28831 https://www.cve.org/CVERecord?id=CVE-2021-28831 Référence CVE CVE-2021-3326 https://www.cve.org/CVERecord?id=CVE-2021-3326 Référence CVE CVE-2021-33574 https://www.cve.org/CVERecord?id=CVE-2021-33574 Référence CVE CVE-2021-33655 https://www.cve.org/CVERecord?id=CVE

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0); SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0); SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0); SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0); SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)
Fixed
2.32.
Action
Update to V3.1.5 or later version
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 30 Apr 2020 · Last source change 4 Aug 2024, 06:46 UTC · CWE-416 · Use After Free

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2020-12583
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceCNA
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2020-12583↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Patch or update reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2020-1752 · cve.blacktree.nl