medium
6.5
CWE
330
Advisory Published
CVE Published
Updated

CVE-2023-31124: AutoTools does not set CARES_RANDOM_FILE during cross compilation

First published: Wed May 24 2023(Updated: )

c-ares is an asynchronous resolver library. When cross-compiling c-ares and using the autotools build system, CARES_RANDOM_FILE will not be set, as seen when cross compiling aarch64 android. This will downgrade to using rand() as a fallback which could allow an attacker to take advantage of the lack of entropy by not using a CSPRNG. This issue was patched in version 1.19.1.

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

Affected SoftwareAffected VersionHow to fix
C-ares Project C-ares<1.19.1
Fedoraproject Fedora=37
Fedoraproject Fedora=38

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-31124?

    CVE-2023-31124 is a vulnerability in the c-ares asynchronous resolver library that downgrades to using rand() as a fallback, allowing an attacker to take advantage of the lack of randomness in cryptographic keys.

  • What is the severity of CVE-2023-31124?

    CVE-2023-31124 has a severity level of medium, with a CVSS score of 6.5.

  • What software versions are affected by CVE-2023-31124?

    Versions up to and excluding 1.19.1 of the c-ares library and Fedora versions 37 and 38 are affected by CVE-2023-31124.

  • How can an attacker exploit CVE-2023-31124?

    An attacker can exploit CVE-2023-31124 by taking advantage of the lack of randomness in cryptographic keys generated by the fallback rand() function.

  • Where can I find more information about CVE-2023-31124?

    You can find more information about CVE-2023-31124 at the following references: [Red Hat Security Advisory](https://access.redhat.com/security/cve/CVE-2023-31124), [GitHub Security Advisory](https://github.com/c-ares/c-ares/security/advisories/GHSA-54xr-f67r-4pc4), [Bugzilla](https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2209542).

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