CVE-2023-6779
An off-by-one heap-based buffer overflow was found in the __vsyslog_internal function of the glibc library.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.15% probability · 87th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-122, CWE-787
- Affected
- gnu/glibc · fedoraproject/fedora
- Source
- secalert@redhat.com
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.