Cyber Resilience

CVE-2021-32840

HighPublic PoC

Published: 26 January 2022

Published
26 January 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 7.3 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
EPSS Score 0.0155 81.8th percentile
Risk Priority 16 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-32840 is a high-severity Path Traversal (CWE-22) vulnerability in Sharpziplib Project Sharpziplib. Its CVSS base score is 7.3 (High).

Operationally, ranked in the top 18.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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…

more

execution. The vulnerability was patched in version 1.3.3.

CWE(s)
CWE-22

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

sharpziplib project
sharpziplib
≤ 1.3.3

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-10 Information Input Validation
addresses: CWE-22

Validates pathnames and filenames to prevent traversal outside intended directories.

References