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CVE-2024-25629

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2024-4249-03
Posted Jul 3, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-4249-03 - An update for c-ares is now available for Red Hat Enterprise Linux 8. Issues addressed include an out of bounds read vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2024-25629
SHA-256 | 5270b94b180f8e9639705a64bbb7590f7ae832ca8ef7e6111b602be615fed48e
Red Hat Security Advisory 2024-3842-03
Posted Jun 12, 2024
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2024-3842-03 - An update for c-ares is now available for Red Hat Enterprise Linux 9. Issues addressed include an out of bounds read vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2024-25629
SHA-256 | a5e7749c400384de02569560302160c979c5e2317d1ce11bcb741740ed53dbb4
Ubuntu Security Notice USN-6676-1
Posted Mar 6, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6676-1 - Vojtěch Vobr discovered that c-ares incorrectly handled user input from local configuration files. An attacker could possibly use this issue to cause a denial of service via application crash.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2024-25629
SHA-256 | dbe62c177736e67d0f34559bcd12eaefa58499419a3ef18ef50db23f6bb5ade7
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