openSUSE-SU-2021:2760-1

    Dashboard / Vulnerabilities / openSUSE-SU-2021:2760-1

    openSUSE-SU-2021:2760-1

    Published: 17 Aug 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-3672
    Aliases:
    CVE-2021-3672

    Summary: Security update for c-ares

    Details: This update for c-ares fixes the following issues: Version update to git snapshot 1.17.1+20200724: - CVE-2021-3672: fixed missing input validation on hostnames returned by DNS servers (bsc#1188881) - If ares_getaddrinfo() was terminated by an ares_destroy(), it would cause crash - Crash in sortaddrinfo() if the list size equals 0 due to an unexpected DNS response - Expand number of escaped characters in DNS replies as per RFC1035 5.1 to prevent spoofing - Use unbuffered /dev/urandom for random data to prevent early startup performance issues

    References: https://lists.opensuse.org/archives/list/[email protected]/thread/4F2ZKNNMGENSNMAS5CDHA3CDDRAXF3AQ/, https://bugzilla.suse.com/1188881, https://www.suse.com/security/cve/CVE-2021-3672

    Affected packages

    Package

    Name: c-ares

    Purl: pkg:rpm/opensuse/c-ares&distro=openSUSE%20Leap%2015.3

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.17.1+20200724-3.14.1

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    openSUSE-SU-2021:2760-1 | CVE-DB