Medium: c-ares

Issue 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. (CVE-2024-25629)

Affected Packages:

c-ares

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update c-ares to update your system.

New Packages:

aarch64:  
    c-ares-1.10.0-3.amzn2.0.6.aarch64  
    c-ares-devel-1.10.0-3.amzn2.0.6.aarch64  
    c-ares-debuginfo-1.10.0-3.amzn2.0.6.aarch64  
  
i686:  
    c-ares-1.10.0-3.amzn2.0.6.i686  
    c-ares-devel-1.10.0-3.amzn2.0.6.i686  
    c-ares-debuginfo-1.10.0-3.amzn2.0.6.i686  
  
src:  
    c-ares-1.10.0-3.amzn2.0.6.src  
  
x86_64:  
    c-ares-1.10.0-3.amzn2.0.6.x86_64  
    c-ares-devel-1.10.0-3.amzn2.0.6.x86_64  
    c-ares-debuginfo-1.10.0-3.amzn2.0.6.x86_64  

Additional References

Red Hat: CVE-2024-25629

Mitre: CVE-2024-25629