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HIGHpublic exploit

CVE-2023-6246

CVE-2023-6246 — Glibc: heap-based buffer overflow in __vsyslog_internal()

A heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when the openlog function was not called, or called with the ident argument set to NULL, and the program name (the basename of argv[0]) is bigger than 1024 bytes, resulting in an application crash or local privilege escalation. This issue affects glibc 2.36 and newer.

Published Updated Sources: cvelistV5, redhat

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the scoring sources call it.

Exploitation

Exploit code

public exploit, none observed

EPSS

5%

chance of exploitation in 30 days

Affects

redhat

9 products listed

CVSS base

8.4

HIGH

CISA SSVC assessment

Three decision points CISA publishes for the CVEs it assesses · SSVC 2.0.3. A stakeholder decision, not a severity score.

CISA

Exploitation

PoC

none · proof-of-concept · active

Automatable

No

can an attacker script all four kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Affected scope

The catalog records vendors and products as separate lists, not pairs, so which product belongs to which vendor is not something this page can say.

Products (9)

glibcred hat enterprise linux 6red hat enterprise linux 7red hat enterprise linux 8red hat enterprise linux 9fedorasimatic s7 1500 cpu 1518 4 pn dp mfpsimatic s7 1500 cpu 1518f 4 pn dp mfpsiplus s7 1500 cpu 1518 4 pn dp mfp

Every base score collected

Sources score independently and disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactSource
8.4CVSS 3.1HIGH——cvelistV5

Weakness & attack patterns

  • CWE-122

Public exploit

Capability, not use: code existing is a different claim from anyone running it.

Indexed by

poc in github

References

13 on the record

Elsewhere on this site

  • redhatevery CVE for this vendor
  • fedoraevery CVE for this vendor
  • siemensevery CVE for this vendor
  • CWE-122other pages naming this weakness

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.