CVE-2023-4911
Glibc: buffer overflow in ld.so leading to privilege escalation
GNU C Library Buffer Overflow Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA notes
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
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.
Severity
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HAffected Products
| Vendor | Product | Affected versions |
|---|---|---|
| - | - | 2.34 to <2.39 |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.28-225.el8_8.6 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8 | 0:2.28-225.el8_8.6 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support | 0:2.28-189.6.el8_6 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.34-60.el9_2.7 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9 | 0:2.34-60.el9_2.7 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 9.0 Extended Update Support | 0:2.34-28.el9_0.4 to <* (unaffected) |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:2.28-189.6.el8_6 to <* (unaffected) |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:4.5.3-10.el8ev to <* (unaffected) |
| Red Hat | Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 | 0:4.5.3-202312060823_8.6 to <* (unaffected) |
| Red Hat | Red Hat Enterprise Linux 6 | - |
| Red Hat | Red Hat Enterprise Linux 7 | - |
| Red Hat | Red Hat Enterprise Linux 7 | - |
References
26 Links- 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/
- https://www.exploit-db.com/exploits/52479
- 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
Record Details
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