CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
15.5%
c-ares is a C library for asynchronous DNS requests. ares__read_line()
is used to parse local configuration files such as /etc/resolv.conf
, /etc/nsswitch.conf
, the HOSTALIASES
file, and if using a c-ares version prior to 1.27.0, the /etc/hosts
file. If any of these configuration files has an embedded NULL
character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.
github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183
github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q
lists.fedoraproject.org/archives/list/[email protected]/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/
lists.fedoraproject.org/archives/list/[email protected]/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/
lists.fedoraproject.org/archives/list/[email protected]/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/
security.alpinelinux.org/vuln/CVE-2024-25629