CVE-2025-62408

EUVD-2025-201830
c-ares is an asynchronous resolver library. Versions 1.32.3 through 1.34.5  terminate a query after maximum attempts when using read_answer() and process_answer(), which can cause a Denial of Service. This issue is fixed in version 1.34.6.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub_MCNA
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 19%
Affected Products (NVD)
VendorProductVersion
c-aresc-ares
1.32.3 ≤
𝑥
< 1.34.6
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
c-ares
bookworm
1.18.1-3
not-affected
bullseye
1.17.1-1+deb11u3
not-affected
bullseye (security)
1.17.1-1+deb11u3
fixed
forky
1.34.6-1
fixed
sid
1.34.6-1
fixed
trixie
1.34.5-1+deb13u1
fixed
trixie (security)
1.34.5-1+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
c-ares
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
plucky
Fixed 1.34.4-2.1ubuntu0.2
released
questing
Fixed 1.34.5-1ubuntu0.1
released
xenial
not-affected
Common Weakness Enumeration
References
https://github.com/c-ares/c-ares/commit/714bf5675c541bd1e668a8db8e67ce012651e618
https://github.com/c-ares/c-ares/security/advisories/GHSA-jq53-42q6-pqr5