by Kastro
Paper/Archive/CVE-2021-32840

CVE-2021-32840

icsharpcode sharpziplib — Path Traversal in SharpZipLib

EPSS 2%public exploitCVSS 9.8
critical.is priorityof 100
55
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 79.7.797 × 2015.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
sharpziplib1.3.3 – < 1.3.31.3.3CNA
sharpziplib0.86.0 – < 0.86.0*0.86.0*CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)7.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

refsecuritylab.github.com/advisories/GHSL-2021-125-sharpziplibrefgithub.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3refgithub.com/icsharpcode/SharpZipLib/commit/a0e96de70b5264f4c919b09253b1522bc7a221cc