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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| — | — | >= 2.34, < 2.39 |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | — |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| 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 | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | < V1.1 |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.5, < * |
References
- https://access.redhat.com/errata/RHSA-2023:5453Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5454Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5455Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5476Third Party Advisory
- https://access.redhat.com/errata/RHSA-2024:0033Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-4911Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2238352Issue Tracking, Patch
- https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txtExploit, Third Party Advisory
- https://www.qualys.com/cve-2023-4911/Third Party Advisory
- http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://seclists.org/fulldisclosure/2023/Oct/11Exploit, Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/10/03/2Exploit, Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/03/3Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/05/1Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/13/11Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/14/3Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/14/5Mailing List
- http://www.openwall.com/lists/oss-security/2023/10/14/6Mailing List
- https://access.redhat.com/errata/RHSA-2023:5453Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5454Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5455Third Party Advisory
- https://access.redhat.com/errata/RHSA-2023:5476Third Party Advisory
- https://access.redhat.com/errata/RHSA-2024:0033Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-4911Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2238352Issue Tracking, Patch
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/Mailing List
- https://security.gentoo.org/glsa/202310-03Third Party Advisory
- https://security.netapp.com/advisory/ntap-20231013-0006/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5514Mailing List
- https://www.exploit-db.com/exploits/52479Exploit, Third Party Advisory, VDB Entry
- https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txtExploit, Third Party Advisory
- https://www.qualys.com/cve-2023-4911/Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-794697.htmlThird Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-831302.htmlThird Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4911US Government Resource
Timeline
- Published
- Oct 3, 2023
- Last modified
- Nov 7, 2026
- Added to CISA KEV
- Nov 21, 2023
- NVD status
- Analyzed