SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write that may lead to code execution. The vulnerability was patched in version 1.3.3.

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

  - SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry     `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write     that may lead to code execution. The vulnerability was patched in version 1.3.3. (CVE-2021-32840)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry
    `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write
    that may lead to code execution. The vulnerability was patched in version 1.3.3. (CVE-2021-32840)

It is, therefore, affected by a vulnerability as referenced in the ALAS2MONO-2023-001 advisory.

    SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Prior to version 1.3.3, a TAR file entry     `../evil.txt` may be extracted in the parent directory of `destFolder`. This leads to arbitrary file write     that may lead to code execution. The vulnerability was patched in version 1.3.3. (CVE-2021-32840)

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

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

ID	Name	Product	Family	Severity
257342	Linux Distros Unpatched Vulnerability : CVE-2021-32840	Nessus	Misc.	critical
416643	SCA: security update for SharpZipLib (GHSA-m22m-h4rf-pwq3)	Tenable Cloud Security	SCA Checks	critical
416643	SCA: security update for SharpZipLib (GHSA-m22m-h4rf-pwq3)	Tenable Self-Hosted Container Security	SCA Checks	critical
182059	Amazon Linux 2 : mono (ALASMONO-2023-001)	Nessus	Amazon Linux Local Security Checks	critical

Detections

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CVE-2021-32840

critical

Tenable Plugins

critical

critical

critical

critical