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CVE-2021-32840

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Date: January 26, 2022

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.

Language: C#

Severity Score

Related Resources (7)

https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib
https://nvd.nist.gov/vuln/detail/CVE-2021-32840
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/
https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc
https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
https://github.com/icsharpcode/SharpZipLib
https://www.mend.io/vulnerability-database/CVE-2021-32840

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): HIGH
Availability (A): LOW

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): PARTIAL
Additional information:

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