UnRAR before 5.5.7 allows 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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - UnRAR before 5.5.7 allows 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.
    (CVE-2017-12938)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote SUSE Linux SLED12 / SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:2834-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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).

The update package also includes non-security fixes. See advisory for details.

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Type	Severity
250208	Linux Distros Unpatched Vulnerability : CVE-2017-12938	Nessus	Misc.	Local	high
152833	SUSE SLED12 / SLES12 Security Update : unrar (SUSE-SU-2021:2834-1)	Nessus	SuSE Local Security Checks	Local	critical
108828	SUSE SLES11 Security Update : unrar (SUSE-SU-2018:0862-1)	Nessus	SuSE Local Security Checks	Local	critical

Detections

Analytics

CVE-2017-12938

high

Tenable Plugins

high

critical

critical