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Full vulnerability report · 2020
CVE-2019-9674High confidence

Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb

n/a · n/a

7.5HighCVSS 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.

1 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
Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.
Remediation
Update to V3.1.5 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-2019-19040

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

Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

What

Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

Lib/zipfile.py in Python through 3.7.2 allows remote attackers to cause a denial of service (resource consumption) via a ZIP bomb.

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

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
a network path → Uncontrolled Resource Consumption → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
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-400 ↗

CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.

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

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-400
A

Official authority intelligence

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

CERT-FR · French · CERTFR-2025-AVI-0896Multiples vulnérabilités dans les produits IBM

tention des correctifs (cf. section Documentation). Documentation Bulletin de sécurité IBM 7247893 du 14 octobre 2025 https://www.ibm.com/support/pages/node/7247893 Bulletin de sécurité IBM 7247975 du 15 octobre 2025 https://www.ibm.com/support/pages/node/7247975 Bulletin de sécurité IBM 7247985 du 15 octobre 2025 https://www.ibm.com/support/pages/node/7247985 Bulletin de sécurité IBM 7248118 du 16 octobre 2025 https://www.ibm.com/support/pages/node/7248118 Bulletin de sécurité IBM 7248127 du 16 octobre 2025 https://www.ibm.com/support/pages/node/7248127 Référence CVE CVE-2018-8740 https://www.cve.org/CVERecord?id=CVE-2018-8740 Référence CVE CVE-2019-9674 https://www.cve.org/CVERecord?id=CVE-2019-9674 Référence CVE CVE-2020-10735 https://www.cve.org/CVERecord?id=CVE-2020-10735 Référence CVE CVE-2022-22968 https://www.cve.org/CVERecord?id=CVE-2022-22968 Référence CVE CVE-2022-31628 https://www.cve.org/CVERecord?id=CVE-2022-31628 Référence CVE CVE-2022-38749 https://www.cve.org/CVERecord?id=CVE-2022-38749 Référence CVE CVE-2022-38750 https://www.cve.org/CVERecord?id=CVE-2022-38750 Référence CVE CVE-2022-38751 https://www.cve.org/CVERecord?id=CVE-2022-38751 Référence CVE CVE-2023-32082 https://www.cve.org/CVERecord?id=CVE-2023-32082 Référence CVE CVE-2023-36479 https://www.cve.org/CVERecord?id=C

Official advisory
CERT-FR · French · CERTFR-2025-AVI-0661Multiples vulnérabilités dans les produits Splunk

d?id=CVE-2019-14540 Référence CVE CVE-2019-14892 https://www.cve.org/CVERecord?id=CVE-2019-14892 Référence CVE CVE-2019-16335 https://www.cve.org/CVERecord?id=CVE-2019-16335 Référence CVE CVE-2019-16869 https://www.cve.org/CVERecord?id=CVE-2019-16869 Référence CVE CVE-2019-16943 https://www.cve.org/CVERecord?id=CVE-2019-16943 Référence CVE CVE-2019-17267 https://www.cve.org/CVERecord?id=CVE-2019-17267 Référence CVE CVE-2019-17531 https://www.cve.org/CVERecord?id=CVE-2019-17531 Référence CVE CVE-2019-20444 https://www.cve.org/CVERecord?id=CVE-2019-20444 Référence CVE CVE-2019-20445 https://www.cve.org/CVERecord?id=CVE-2019-20445 Référence CVE CVE-2019-9674 https://www.cve.org/CVERecord?id=CVE-2019-9674 Référence CVE CVE-2020-10650 https://www.cve.org/CVERecord?id=CVE-2020-10650 Référence CVE CVE-2020-36189 https://www.cve.org/CVERecord?id=CVE-2020-36189 Référence CVE CVE-2020-36518 https://www.cve.org/CVERecord?id=CVE-2020-36518 Référence CVE CVE-2021-20190 https://www.cve.org/CVERecord?id=CVE-2021-20190 Référence CVE CVE-2021-21290 https://www.cve.org/CVERecord?id=CVE-2021-21290 Référence CVE CVE-2021-21295 https://www.cve.org/CVERecord?id=CVE-2021-21295 Référence CVE CVE-2021-21409 https://www.cve.org/CVERecord?id=CVE-2021-21409 Référence CVE CVE-2021-23413 https://www.cve.org/CVERecord?id=C

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

.cve.org/CVERecord?id=CVE-2019-5482 Référence CVE CVE-2019-6109 https://www.cve.org/CVERecord?id=CVE-2019-6109 Référence CVE CVE-2019-6110 https://www.cve.org/CVERecord?id=CVE-2019-6110 Référence CVE CVE-2019-6111 https://www.cve.org/CVERecord?id=CVE-2019-6111 Référence CVE CVE-2019-6488 https://www.cve.org/CVERecord?id=CVE-2019-6488 Référence CVE CVE-2019-7309 https://www.cve.org/CVERecord?id=CVE-2019-7309 Référence CVE CVE-2019-8457 https://www.cve.org/CVERecord?id=CVE-2019-8457 Référence CVE CVE-2019-9169 https://www.cve.org/CVERecord?id=CVE-2019-9169 Référence CVE CVE-2019-9636 https://www.cve.org/CVERecord?id=CVE-2019-9636 Référence CVE CVE-2019-9674 https://www.cve.org/CVERecord?id=CVE-2019-9674 Référence CVE CVE-2019-9740 https://www.cve.org/CVERecord?id=CVE-2019-9740 Référence CVE CVE-2019-9923 https://www.cve.org/CVERecord?id=CVE-2019-9923 Référence CVE CVE-2019-9936 https://www.cve.org/CVERecord?id=CVE-2019-9936 Référence CVE CVE-2019-9937 https://www.cve.org/CVERecord?id=CVE-2019-9937 Référence CVE CVE-2019-9947 https://www.cve.org/CVERecord?id=CVE-2019-9947 Référence CVE CVE-2019-9948 https://www.cve.org/CVERecord?id=CVE-2019-9948 Référence CVE CVE-2020-10029 https://www.cve.org/CVERecord?id=CVE-2020-10029 Référence CVE CVE-2020-10531 https://www.cve.org/CVERecord?id=CVE-2020-1053

Official advisory
NCSC-NL · Dutch · NCSC-2024-0339Kwetsbaarheden verholpen in Microsoft Mariner

De kwetsbaarheden betreffen oudere kwetsbaarheden in diverse subcomponenten van de distro, zoals Python, Emacs, Qemu, Django, Curl, wget etc. welke in de nieuwe versie zijn verholpen.

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
No fixed version is explicitly recorded in the structured CVE data.
Action
Update to V3.1.5 or later version
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 4 Feb 2020 · Last source change 4 Aug 2024, 21:54 UTC · CWE-400 · Uncontrolled Resource Consumption

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
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-2019-19040
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceNIST NVD
NVD statusNVD enriched

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
ENISA EUVD · EUVD-2019-19040↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Vendor advisory↗Vendor advisory↗Vendor advisory↗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-2019-9674 · cve.blacktree.nl