CVE-2014-3484

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-02-20 · updated 2026-06-17
Weakness: CWE-787

Description

Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x before 1.1.2 and 0.9.13 through 1.0.3 allow remote attackers to (1) have unspecified impact via an invalid name length in a DNS response or (2) cause a denial of service (crash) via an invalid name length in a DNS response, related to an infinite loop with no output.

Affected products

musl-libc musl: from 0.9.13 through 1.0.3; from 1.1.0 before 1.1.2 — fixed in 1.1.2

How to fix

Upgrade to a fixed version: musl-libc musl 1.1.2. Check the vendor advisory for mitigations.

References

http://git.musl-libc.org/cgit/musl/commit/?id=b3d9e0b94ea73c68ef4169ec82c898ce59a4e30a
http://seclists.org/oss-sec/2014/q2/495
http://git.musl-libc.org/cgit/musl/commit/?id=b3d9e0b94ea73c68ef4169ec82c898ce59a4e30a
http://seclists.org/oss-sec/2014/q2/495

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