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CVE-2024-25629

nvd nist
Published: Feb 23, 2024Modified: Jun 17, 2026

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5.5
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability: 1.8 / Impact: 3.6
Source: NVD

Description

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.

Affected (4)

C Ares
1 product
C Ares
Fedoraproject
1 product
Fedora
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
C Ares
Before 1.27.0
Configuration B
3 vulnerable
Vulnerable SoftwareAffected Versions
Fedoraproject
Fedora
Version 38
Fedora
Version 39
Fedora
Version 40

Related CWEs

CWE-125
Out-of-bounds Read
The product reads data past the end, or before the beginning, of the intended buffer.
CWE-127
Buffer Under-read
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations prior to the targeted buffer.

References (10)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Vendor Advisory
Source: security-advisories@github.com
Mailing List
Source: security-advisories@github.com
Mailing List
Source: security-advisories@github.com
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
Patch
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List

Timeline

No history available yet.