CVE-2021-32840

Public Exploit
Path Traversal in SharpZipLib

Description

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.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.57% Top 20%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com
Affected: icsharpcode sharpziplib
Published at:
Updated at:

References

Link Tags
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/ third party advisory exploit
https://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3 third party advisory
https://github.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-32840?
CVE-2021-32840 has been scored as a high severity vulnerability.
How to fix CVE-2021-32840?
To fix CVE-2021-32840, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32840 being actively exploited in the wild?
It is possible that CVE-2021-32840 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32840?
CVE-2021-32840 affects icsharpcode sharpziplib.
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