CVE-2015-8011: n/a — Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Recommended actionWithin 72 hours

Critical technical impact with a remotely reachable, unauthenticated path; no CISA KEV confirmation is currently recorded.

Patch available

What, why and how

Buffer overflow in the lldp_decode function in daemon/protocols/lldp.c in lldpd before 0.8.0 allows remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via vectors involving large management addresses and TLV boundaries.

What

Why

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

How

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

What

Why

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.

How

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 → Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') → execute code or commands in the affected security context
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-120 ↗
CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow'). The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.
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:H/I:H/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.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.

NetworkUnauthenticatedRemote code executionDenial of serviceCWE-120

Official authority intelligence

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

ENISA EUVD · EUVD-2015-7907Official EUVD mapping

0 linked advisory records.

Official EUVD record

CERT-FR · French · CERTFR-2021-AVI-518Multiples vulnérabilités dans les produits Siemens

ctcert/pdf/ssa-661034.pdf Bulletin de sécurité Siemens ssa-675303 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-675303.pdf Bulletin de sécurité Siemens ssa-729965 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-729965.pdf Bulletin de sécurité Siemens ssa-772220 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf Bulletin de sécurité Siemens ssa-913875 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-913875.pdf Bulletin de sécurité Siemens ssa-941426 du 13 juillet 2021 https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf Référence CVE CVE-2015-8011 https://www.cve.org/CVERecord?id=CVE-2015-8011 Référence CVE CVE-2020-15782 https://www.cve.org/CVERecord?id=CVE-2020-15782 Référence CVE CVE-2020-26147 https://www.cve.org/CVERecord?id=CVE-2020-26147 Référence CVE CVE-2020-27827 https://www.cve.org/CVERecord?id=CVE-2020-27827 Référence CVE CVE-2020-28400 https://www.cve.org/CVERecord?id=CVE-2020-28400 Référence CVE CVE-2021-20093 https://www.cve.org/CVERecord?id=CVE-2021-20093 Référence CVE CVE-2021-20094 https://www.cve.org/CVERecord?id=CVE-2021-20094 Référence CVE CVE-2021-25671 https://www.cve.org/CVERecord?id=CVE-2021-25671 Référence CVE CVE-2021-29998 https://www.cve.org/CVERecord?id=C

Official advisory

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 CP 1243-1 (6GK7243-1BX30-0XE0); SIMATIC CP 1243-8 IRC (6GK7243-8RX30-0XE0); SIMATIC CP 1542SP-1 (6GK7542-6UX00-0XE0); SIMATIC CP 1542SP-1 IRC (6GK7542-6VX00-0XE0); SIMATIC CP 1543-1 (6GK7543-1AX00-0XE0); SIMATIC CP 1543SP-1 (6GK7543-6WX00-0XE0); SIMATIC CP 1545-1 (6GK7545-1GX00-0XE0); SIMATIC HMI Unified Comfort Panels; SINUMERIK ONE MCP; SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (6AG2542-6VX00-4XE0); SIPLUS ET 200SP CP 1543SP-1 ISEC (6AG1543-6WX00-7XE0); SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (6AG2543-6WX00-4XE0); SIPLUS NET CP 1543-1 (6AG1543-1AX00-2XE0); SIPLUS S7-1200 CP 1243-1 (6AG1243-1BX30-2AX0); SIPLUS S7-1200 CP 1243-1 RAIL (6AG2243-1BX30-1XE0); SIPLUS TIM 1531 IRC (6AG1543-1MX00-7XE0); TIM 1531 IRC (6GK7543-1MX00-0XE0)
Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action: Update to V2.2.28 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.

Evidence and provenance

Published 28 Jan 2020 · Last source change 6 Aug 2024, 08:06 UTC · CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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-2015-7907

Product sourceVendor CSAF · Siemens ProductCERT

Remediation sourceVendor CSAF · Siemens ProductCERT

CWE sourceNIST NVD

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.

2020-01-28CVE published

2024-08-06Fixed release or patch reference recorded

ENISA EUVD · EUVD-2015-7907↗Vendor CSAF · Siemens ProductCERT↗CVE authority or vendor reference↗Patch or update 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.

n/a — Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Authoritative vendor CSAF and VEX advisories

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

ENISA European Vulnerability Database

EUVD-2015-7907

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication

n/a — Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

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

EUVD-2015-7907

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

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