CVE-2023-4911
is CVE-2023-4911real, exploitable, or a false positive? Here's the community ground truth.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
References
Published
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Field notes & remediation
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- 0
GNU C Library Buffer Overflow Vulnerability — 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. Listed in the CISA KEV catalog (added 2023-11-21) — confirmed exploited in the wild, not theoretical. FIRST EPSS puts the chance of exploitation in the next 30 days at ~79%. Treat it as real and prioritize remediation over triage.
- 0
Required action for GNU GNU C Library: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. CISA set a federal remediation due date of 2023-12-12. After patching, verify the vulnerable path is no longer reachable before closing the finding.
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