SUSE-SU-2021:2834-1

    Dashboard / Vulnerabilities / SUSE-SU-2021:2834-1

    SUSE-SU-2021:2834-1

    Published: 25 Aug 2021Last Modified: 4 Feb 2026

    Summary: Security update for unrar

    Details: This update for unrar to version 5.6.1 fixes several issues. These security issues were fixed: - CVE-2017-12938: Prevent remote attackers to bypass a directory-traversal protection mechanism via vectors involving a symlink to the . directory, a symlink to the .. directory, and a regular file (bsc#1054038). - CVE-2017-12940: Prevent out-of-bounds read in the EncodeFileName::Decode call within the Archive::ReadHeader15 function (bsc#1054038). - CVE-2017-12941: Prevent an out-of-bounds read in the Unpack::Unpack20 function (bsc#1054038). - CVE-2017-12942: Prevent a buffer overflow in the Unpack::LongLZ function (bsc#1054038). - CVE-2017-20006: Fixed heap-based buffer overflow in Unpack:CopyString (bsc#1187974). These non-security issues were fixed: - Added extraction support for .LZ archives created by Lzip compressor - Enable unpacking of files in ZIP archives compressed with XZ algorithm and encrypted with AES - Added support for PAX extended headers inside of TAR archive - If RAR recovery volumes (.rev files) are present in the same folder as usual RAR volumes, archive test command verifies .rev contents after completing testing .rar files - By default unrar skips symbolic links with absolute paths in link target when extracting unless -ola command line switch is specified - Added support for AES-NI CPU instructions - Support for a new RAR 5.0 archiving format - Wildcard exclusion mask for folders - Prevent conditional jumps depending on uninitialised values (bsc#1046882)

    References: https://www.suse.com/support/update/announcement/2021/suse-su-20212834-1/, https://bugzilla.suse.com/1046882, https://bugzilla.suse.com/1054038, https://bugzilla.suse.com/1187974, https://www.suse.com/security/cve/CVE-2012-6706, https://www.suse.com/security/cve/CVE-2017-12938, https://www.suse.com/security/cve/CVE-2017-12940, https://www.suse.com/security/cve/CVE-2017-12941, https://www.suse.com/security/cve/CVE-2017-12942, https://www.suse.com/security/cve/CVE-2017-20006

    Affected packages

    Package

    Name: unrar

    Purl: pkg:rpm/suse/unrar&distro=SUSE%20OpenStack%20Cloud%208

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -5.6.1-4.5.1

    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