Path Traversal in Icsharpcode Sharpziplib
CVE-2021-32840
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.020 (78.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.
Affected products
- Icsharpcode Sharpziplib — versions 1.3.3, 0.86.0
- Sharpziplib_project Sharpziplib
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-32840?
- CVE-2021-32840 is a high-severity vulnerability in Icsharpcode Sharpziplib, classified under Path Traversal. CVSS score: 7.3/10. Published 2022-01-26.
- How severe is CVE-2021-32840?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2021-32840 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.