CVE-2021-32840

Path Traversal in SharpZipLib

CVSS 7.3 HIGHEPSS 2.0%CWE-22

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.3EPSS 2.0%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

26 Jan 2022Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Affected products

icsharpcode · sharpziplib

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References

https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3 https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/