CVE-2023-4911: Glibc: buffer overflow in ld.so leading to privilege escalation
In CISA’s Known Exploited Vulnerabilities catalog: GNU C Library Buffer Overflow Vulnerability.
Added , federal remediation due . Known ransomware use: Unknown.
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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.
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · CWE-122
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Red Hat: Red Hat Enterprise Linux 6Red Hat: Red Hat Enterprise Linux 7Red Hat: Red Hat Enterprise Linux 8Red Hat: Red Hat Enterprise Linux 8.6 Extended Update SupportRed Hat: Red Hat Enterprise Linux 9Red Hat: Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Siemens: SIMATIC S7-1500 CPU 1518-4 PN/DP MFPSiemens: SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPSiemens: SIMATIC S7-1500 TM MFP - GNU/Linux subsystemSiemens: SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- access.redhat.com/errata/RHSA-2023:5453 (opens in new tab)
- access.redhat.com/errata/RHSA-2023:5454 (opens in new tab)
- access.redhat.com/errata/RHSA-2023:5455 (opens in new tab)
- access.redhat.com/errata/RHSA-2023:5476 (opens in new tab)
- access.redhat.com/errata/RHSA-2024:0033 (opens in new tab)
- access.redhat.com/security/cve/CVE-2023-4911 (opens in new tab)
- bugzilla.redhat.com/show_bug.cgi (opens in new tab)
- www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-g… (opens in new tab)
- www.qualys.com/cve-2023-4911/ (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)