CVE-2023-4911
Description
Important: glibc security update
CISA KEV
- Vendor
- GNU
- Product
- GNU C Library
- Due date
- 2023-12-12
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2023-5453.html
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2023-5455.html
Vendor advisory: alma — https://bugzilla.redhat.com/2238352
Vendor advisory: alma — https://bugzilla.redhat.com/2237798
Vendor advisory: alma — https://bugzilla.redhat.com/2237782
Vendor advisory: alma — https://bugzilla.redhat.com/2234712
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2023:5455
Vendor advisory: cisa-kev — This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=1056e5b4c3f2d90ed2b4a55f96add28da2f4c8fa, https://access.redhat.com/security/cve/cve-2023-4911, https://www.debian.org/security/2023/dsa-5514 ; https://nvd.nist.gov/vuln/detail/CVE-2023-4911
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-4911
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2023-4911.html
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2023:5455
Vendor advisory: secalert@redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2238352
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2023:5453
Mitigation details
Description glibc: buffer overflow in ld.so leading to privilege escalation Red Hat statement This vulnerability was introduced in glibc version 2.34. RHEL-8 ships glibc 2.28, which is not originally affected by this vulnerability. However, the commit that introduced this vulnerability was backported to RHEL-8.5, making this version and onward vulnerable. RHEL-8.4 and older are not affected by…
Description
glibc: buffer overflow in ld.so leading to privilege escalation
Red Hat statement
This vulnerability was introduced in glibc version 2.34. RHEL-8 ships glibc 2.28, which is not originally affected by this vulnerability. However, the commit that introduced this vulnerability was backported to RHEL-8.5, making this version and onward vulnerable. RHEL-8.4 and older are not affected by this vulnerability.
CVSS v3: 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Errata / fixed releases
| Product | Package | Advisory | Released |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | glibc-0:2.28-225.el8_8.6 | RHSA-2023:5455 | 2023-10-05T00:00:00Z |
| Red Hat Enterprise Linux 8 | glibc-0:2.28-225.el8_8.6 | RHSA-2023:5455 | 2023-10-05T00:00:00Z |
| Red Hat Enterprise Linux 8.6 Extended Update Support | glibc-0:2.28-189.6.el8_6 | RHSA-2023:5476 | 2023-10-05T00:00:00Z |
| Red Hat Enterprise Linux 9 | glibc-0:2.34-60.el9_2.7 | RHSA-2023:5453 | 2023-10-05T00:00:00Z |
| Red Hat Enterprise Linux 9 | glibc-0:2.34-60.el9_2.7 | RHSA-2023:5453 | 2023-10-05T00:00:00Z |
| Red Hat Enterprise Linux 9.0 Extended Update Support | glibc-0:2.34-28.el9_0.4 | RHSA-2023:5454 | 2023-10-05T00:00:00Z |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | glibc-0:2.28-189.6.el8_6 | RHSA-2023:5476 | 2023-10-05T00:00:00Z |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | redhat-release-virtualization-host-0:4.5.3-10.el8ev | RHSA-2024:0033 | 2024-01-03T00:00:00Z |
| Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | redhat-virtualization-host-0:4.5.3-202312060823_8.6 | RHSA-2024:0033 | 2024-01-03T00:00:00Z |
Package state
| Product | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 6 | glibc | Not affected |
| Red Hat Enterprise Linux 7 | compat-glibc | Not affected |
| Red Hat Enterprise Linux 7 | glibc | Not affected |
Apply commands
yum update -y glibc
# or:
dnf upgrade -y glibcAffected
| Vendor | Product | Version |
|---|---|---|
| redhat | Red Hat Enterprise Linux 6 | Not affected |
| redhat | Red Hat Enterprise Linux 7 | Not affected |
| redhat | Red Hat Enterprise Linux 7 | Not affected |
Exploits
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rhel | 9 | fixed | |
| rocky | 8 | fixed | |
| sles | affected | | |
| debian | bookworm | fixed | 2.36-9+deb12u3 |
| debian | bullseye | fixed | 2.31-13+deb11u7 |
| debian | forky | fixed | 2.37-12 |
| debian | sid | fixed | 2.37-12 |
| debian | trixie | fixed | 2.37-12 |
| ubuntu | 22.04 | affected | |
| ubuntu | 23.04 | affected | |
| debian | 11.0 | affected | |
| debian | 12.0 | affected | |
| fedora | 37 | affected | |
| fedora | 38 | affected | |
| fedora | 39 | affected | |
| rhel | 8.0 | affected | |
| rhel | 9.0 | affected | |
| rhel | 8.6 | affected | |
| rhel | 9.2 | affected | |
| rhel | 9.4 | affected | |
| rhel | 9.6 | affected | |
| rhel | 9.0_aarch64 | affected | |
Application impact
References
- 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://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
- https://security.netapp.com/advisory/ntap-20231013-0006/
- https://www.debian.org/security/2023/dsa-5514
CWEs
CWE-122 CWE-787
Verify integrity in audit chain (admin only). AS-IS.