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.
Metrics
CVSS 3.1 7.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | glibc | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Fedora | Fedora | — |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.5, < * |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
References
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
- https://security.gentoo.org/glsa/202402-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
- http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2024/Feb/3Exploit, Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-6779Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2254395Issue Tracking
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MWQ6BZJ6CV5UAW4VZSKJ6TO4KIW2KWAQ/Mailing List
- https://security.gentoo.org/glsa/202402-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20240223-0006/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2024/01/30/6Exploit, Mailing List
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txtThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
Timeline
- Published
- Jan 31, 2024
- Last modified
- Jun 17, 2026
- NVD status
- Modified