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CVE-2023-6779

Glibc: off-by-one heap-based buffer overflow in __vsyslog_internal()

Published: 1/31/2024 Last updated: 7/14/2026 Reserved: 12/13/2023

An off-by-one 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 these functions are called with a message bigger than INT_MAX bytes, leading to an incorrect calculation of the buffer size to store the message, resulting in an application crash. This issue affects glibc 2.37 and newer.

CNA assigner: redhat (53f830b8-0a3f-465b-8143-3b8a9948e749) Requested by: n/a

Metrics

Version Score Severity Vector String
3.1 8.2 High CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Opam packages affected (1)

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Products affected (16)

Product Vendor Version
Red Hat Enterprise Linux 7 Red Hat n/a
Red Hat Enterprise Linux 7 Red Hat < publication
Red Hat Enterprise Linux 6 Red Hat >= 2.3.0, < 2.3.3
Red Hat Enterprise Linux 6 Red Hat < publication
Red Hat Enterprise Linux 8 Red Hat Affected Version:3.4.5.18 Fixed Version:3.4.5.24
Red Hat Enterprise Linux 9 Red Hat < 1.2.11
Fedora Fedora < 72.0.3626.81
Red Hat Enterprise Linux 6 Red Hat < publication
Red Hat Enterprise Linux 7 Red Hat 5.0.8.11
Red Hat Enterprise Linux 9 Red Hat n/a
Red Hat Enterprise Linux 8 Red Hat 8.0.26 and prior
Fedora Fedora 14.1.0-14.1.0.6
Red Hat Enterprise Linux 6 Red Hat >= 2.4.0, < 2.4.2
Red Hat Enterprise Linux 7 Red Hat Ver.6.x and Ver.7.x
glibc n/a Android-10
glibc n/a >= 2.2.0, < 2.2.3

References (42)

Credits (2)