• [SECURITY] [DSA 5419-1] c-ares security update

    From Aron Xu@21:1/5 to All on Wed Jun 7 07:20:01 2023
    Hash: SHA256

    - ------------------------------------------------------------------------- Debian Security Advisory DSA-5419-1 security@debian.org https://www.debian.org/security/ Aron Xu
    June 07, 2023 https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : c-ares
    CVE ID : CVE-2023-31130 CVE-2023-32067
    Debian Bug :

    Two vunerabilities were discovered in c-ares, an asynchronous name
    resolver library:


    ares_inet_net_pton() is found to be vulnerable to a buffer underflow
    for certain ipv6 addresses, in particular "0::00:00:00/2" was found
    to cause an issue. c-ares only uses this function internally for
    configuration purposes, however external usage for other purposes may
    cause more severe issues.


    Target resolver may erroneously interprets a malformed UDP packet
    with a lenght of 0 as a graceful shutdown of the connection, which
    could cause a denial of service.

    For the stable distribution (bullseye), these problems have been fixed in version 1.17.1-1+deb11u3.

    We recommend that you upgrade your c-ares packages.

    For the detailed security status of c-ares please refer to
    its security tracker page at: https://security-tracker.debian.org/tracker/c-ares

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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