CVE-2023-4911
Red Hat · published 2023-10-03
Source record Collected from the National Vulnerability Database (NVD)
CISA Known Exploited Vulnerabilities
CISA lists this CVE as known exploited (added 2023-11-21).
- CISA's name for it: GNU C Library Buffer Overflow Vulnerability
- CISA's description: GNU C Library's dynamic loader ld.so contains a buffer overflow vulnerability when processing the GLIBC_TUNABLES environment variable, allowing a local attacker to execute code with elevated privileges.
- Known ransomware campaign use, per CISA: Unknown
Source: CISA KEV catalog (CC0 1.0).
Description
Description by Red Hat, Inc. via the CVE Program.
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.
Status at the source
- NVD status: Analyzed
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.28-225.el8_8.6 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.28-225.el8_8.6 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | 0:2.28-189.6.el8_6 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.34-60.el9_2.7 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.34-60.el9_2.7 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 0:2.34-28.el9_0.4 – before *: unaffected |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:2.28-189.6.el8_6 – before *: unaffected |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:4.5.3-10.el8ev – before *: unaffected |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:4.5.3-202312060823_8.6 – before *: unaffected |
| Red Hat | Red Hat Enterprise Linux 6 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
| Red Hat | Red Hat Enterprise Linux 7 | — |
Added by siemens-SADP (Authorized Data Publisher)
| Vendor | Product | Versions |
|---|---|---|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | V3.1.5 – before *: affected |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | V3.1.5 – before *: affected |
Products named in NVD's CPE match criteria (39)
cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518f-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:siplus_s7-1500_cpu_1518-4_pn\/dp_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:o:siemens:simatic_s7-1500_tm_mfp_firmware:*:*:*:*:*:*:*:*cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder:9.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_eus:8.6:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_arm64:9.0_aarch64:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_arm64_eus:8.6:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_ibm_z_systems_eus:8.6:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*cpe:2.3:a:redhat:codeready_linux_builder_for_power_little_endian_eus:8.6:*:*:*:*:*:*:*cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:virtualization_host:4.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_eus:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_arm_64:9.0_aarch64:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_arm_64_eus:8.6_aarch64:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems:9.0_s390x:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus:9.2_s390x:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_ibm_z_systems_eus_s390x:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_power_big_endian_eus:8.6_ppc64le:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian:9.0_ppc64le:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_for_power_little_endian_eus:9.2_ppc64le:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_aus:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions:9.2_ppc64le:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server_tus:8.6:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_update_services_for_sap_solutions:9.2:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:22.04:*:*:*:lts:*:*:*cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*cpe:2.3:o:netapp:h410c_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h300s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h500s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h700s_firmware:-:*:*:*:*:*:*:*cpe:2.3:o:netapp:h410s_firmware:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 3.1: 7.8 HIGH — as published by Red Hat, Inc. (Secondary)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1: 7.8 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: active · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/errata/RHSA-2023:5454
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:5476
- https://access.redhat.com/errata/RHSA-2024:0033
- https://access.redhat.com/security/cve/CVE-2023-4911
- https://bugzilla.redhat.com/show_bug.cgi?id=2238352
- https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt
- https://www.qualys.com/cve-2023-4911/
- http://packetstormsecurity.com/files/174986/glibc-ld.so-Local-Privilege-Escalation.html
- http://packetstormsecurity.com/files/176288/Glibc-Tunables-Privilege-Escalation.html
- http://seclists.org/fulldisclosure/2023/Oct/11
- http://www.openwall.com/lists/oss-security/2023/10/03/2
- http://www.openwall.com/lists/oss-security/2023/10/03/3
- http://www.openwall.com/lists/oss-security/2023/10/05/1
- http://www.openwall.com/lists/oss-security/2023/10/13/11
- http://www.openwall.com/lists/oss-security/2023/10/14/3
- http://www.openwall.com/lists/oss-security/2023/10/14/5
- http://www.openwall.com/lists/oss-security/2023/10/14/6
- https://access.redhat.com/errata/RHSA-2023:5453
- https://access.redhat.com/errata/RHSA-2023:5454
- https://access.redhat.com/errata/RHSA-2023:5455
- https://access.redhat.com/errata/RHSA-2023:5476
- https://access.redhat.com/errata/RHSA-2024:0033
- https://access.redhat.com/security/cve/CVE-2023-4911
- https://bugzilla.redhat.com/show_bug.cgi?id=2238352
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4DBUQRRPB47TC3NJOUIBVWUGFHBJAFDL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFG4P76UHHZEWQ26FWBXG76N2QLKKPZA/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NDAQWHTSVOCOZ5K6KPIWKRT3JX4RTZUR/
- https://security.gentoo.org/glsa/202310-03
The source lists more references.
Source dates: published 2023-10-03, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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