CVE-2024-25629
Medium
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.
SeverityMedium
CVSS4.4
Exploit probability—
Product
C-ares
PublishedFeb 23, 2024
First seenFeb 23, 2024
Weakness typeCWE-127CWE-127
How to fix
Update
- c-ares c-ares1.27.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| c-ares c-ares | v < 1.27.0 | 1.27.0 |
| fedoraproject fedora | 38, 39, 40 | — |
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