CVE-2023-6779

8.2 HIGH
Published: January 31, 2024 Modified: May 12, 2026
View on NVD

Description

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.

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
Source: secalert@redhat.com
Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2024/Feb/3
Source: secalert@redhat.com
Exploit Mailing List Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-6779
Source: secalert@redhat.com
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2254395
Source: secalert@redhat.com
Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
Source: secalert@redhat.com
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/
Source: secalert@redhat.com
Mailing List
https://security.gentoo.org/glsa/202402-01
Source: secalert@redhat.com
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240223-0006/
Source: secalert@redhat.com
Third Party Advisory
https://www.openwall.com/lists/oss-security/2024/01/30/6
Source: secalert@redhat.com
Exploit Mailing List
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
Source: secalert@redhat.com
Third Party Advisory
http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2024/Feb/3
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Mailing List Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-6779
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2254395
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
https://security.gentoo.org/glsa/202402-01
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://security.netapp.com/advisory/ntap-20240223-0006/
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://www.openwall.com/lists/oss-security/2024/01/30/6
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Mailing List
https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Source: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

21 reference(s) from NVD

Quick Stats

CVSS v3 Score
8.2 / 10.0
EPSS (Exploit Probability)
0.7%
72th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-122 CWE-787

Affected Vendors

gnu fedoraproject

Related CVEs

CVE-2026-9278 N/A
CVE-2026-8935 N/A
CVE-2026-8386 N/A
CVE-2026-8385 N/A
CVE-2026-12223 5.5