CVE-2025-4802: glibc — Exploit & Fix

Description

Untrusted LD_LIBRARY_PATH environment variable vulnerability in the GNU C Library version 2.27 to 2.38 allows attacker controlled loading of dynamically shared library in statically compiled setuid binaries that call dlopen (including internal dlopen calls after setlocale or calls to NSS functions such as getaddrinfo).

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness Type (CWE)

CWE-426 CWE-426

Affected Products

Vendor	Product	Versions
gnu	glibc	2.27 — 2.38

References

Advisories & Patches

https://sourceware.org/cgit/glibc/commit/?id=1e18586c5820e329f741d5c710275e165581380e

Exploits

http://www.openwall.com/lists/oss-security/2025/05/17/2

Other References

https://sourceware.org/bugzilla/show_bug.cgi?id=32976 http://www.openwall.com/lists/oss-security/2025/05/16/7 https://lists.debian.org/debian-lts-announce/2025/05/msg00033.html

Frequently Asked Questions

What is CVE-2025-4802? +

Untrusted LD_LIBRARY_PATH environment variable vulnerability in the GNU C Library version 2.27 to 2.38 allows attacker controlled loading of dynamically shared library in statically compiled setuid binaries that call dlopen (including internal dlopen calls after setlocale or calls to NSS functions such as getaddrinfo). It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-4802? +

CVE-2025-4802 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-4802? +

CVE-2025-4802 affects products from gnu, specifically: glibc. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4802? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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