CVE-2024-25629CWE-127

c-ares out of bounds read in ares__read_line()

Medium · published February 23, 2024

CVSS v3.1
4.4
EPSS
0%
Percentile
27.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.4 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00352 · 27.6th percentile
Weakness
CWE-127 · Buffer Under-read
Published
2024-02-23T14:52Z
EPSS history
Timeline
  • 23 FEB 14:52Z
    c-ares out of bounds read in ares__read_line()
    cvelistv5