high
8.4
CWE
119 122 787
Advisory Published
CVE Published
CVE Published
Updated

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

First published: Fri Nov 10 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/glibc<2.39
2.39
ubuntu/glibc<2.38-1ubuntu6.1
2.38-1ubuntu6.1
ubuntu/glibc<2.37-15
2.37-15
debian/glibc
2.28-10+deb10u1
2.28-10+deb10u2
2.31-13+deb11u8
2.31-13+deb11u7
2.36-9+deb12u4
2.37-15
2.37-17
GNU C Library=2.37
GNU C Library=2.36
GNU C Library>=2.36<2.39
Fedora=38
Fedora=39

Remedy

https://sourceware.org/git/?p=glibc.git;a=commit;h=6bd0e4efcc78f3c0115e5ea9739a1642807450da

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2023-6246?

    CVE-2023-6246 has been classified as a high severity vulnerability due to its potential impact on affected systems.

  • How do I fix CVE-2023-6246?

    To mitigate CVE-2023-6246, update the glibc library to version 2.39 or later.

  • Which software versions are affected by CVE-2023-6246?

    CVE-2023-6246 impacts glibc versions 2.36 and 2.37.

  • What type of vulnerability is CVE-2023-6246?

    CVE-2023-6246 is a heap-based buffer overflow vulnerability.

  • What functions are primarily associated with CVE-2023-6246?

    CVE-2023-6246 is related to the __vsyslog_internal function and the logging functions called within the glibc library.

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