medium
5.5
CWE
127 125
EPSS
0.043%
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2024-25629: c-ares out of bounds read in ares__read_line()

First published: Fri Feb 23 2024(Updated: )

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.

Credit: security-advisories@github.com security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
debian/c-ares<=1.14.0-1+deb10u1<=1.14.0-1+deb10u4<=1.17.1-1+deb11u3<=1.18.1-3
1.27.0-1
ubuntu/c-ares<1.14.0-1ubuntu0.2+
1.14.0-1ubuntu0.2+
ubuntu/c-ares<1.15.0-1ubuntu0.5
1.15.0-1ubuntu0.5
ubuntu/c-ares<1.18.1-1ubuntu0.22.04.3
1.18.1-1ubuntu0.22.04.3
ubuntu/c-ares<1.19.1-3ubuntu0.1
1.19.1-3ubuntu0.1
ubuntu/c-ares<1.27.0
1.27.0
ubuntu/c-ares<1.10.0-3ubuntu0.2+
1.10.0-3ubuntu0.2+
redhat/c-ares<1.27.0
1.27.0
IBM Cognos Analytics<=12.0.0-12.0.3
IBM Cognos Analytics<=11.2.0-11.2.4 FP4
F5 Traffix Systems Signaling Delivery Controller>=5.1.0<=5.2.0
c-ares<1.27.0
Fedora=38
Fedora=39
Fedora=40

Remedy

https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2024-25629?

    CVE-2024-25629 has been assigned a severity rating that indicates potential exploitation could lead to significant security risks.

  • How do I fix CVE-2024-25629?

    To fix CVE-2024-25629, update c-ares to version 1.27.0 or later.

  • Which software is affected by CVE-2024-25629?

    CVE-2024-25629 affects multiple versions of the c-ares library across various operating systems and products.

  • What are the potential risks associated with CVE-2024-25629?

    The risks include potential exploitation of vulnerabilities in DNS request handling, which could lead to data exposure or system compromise.

  • Is there a specific patch for CVE-2024-25629?

    Yes, patches are available for various distributions, including updates for Ubuntu and Debian to resolve CVE-2024-25629.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203