Critical
mono — security advisory
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.
- Products
- mono
- Affected versions
- 6.12.0.199+dfsg-3, 6.12.0.199+dfsg-6, 6.14.1+ds2-1, 6.14.1+ds2-2, 6.14.1+ds2-3, 6.8.0.105+dfsg-3.2, 6.8.0.105+dfsg-3.4, 6.8.0.105+dfsg-3.5ubuntu1, 6.8.0.105+dfsg-3.6ubuntu1, 6.8.0.105+dfsg-3.6ubuntu2
- Fixed versions
- Not specified
- CVEs
- CVE-2021-32840
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:34 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2021-32840
mono
Fixed versions: Not specified
mono
Fixed versions: Not specified
mono
Fixed versions: Not specified
mono
Fixed versions: Not specified
mono
Fixed versions: Not specified
Complete source record
{
"id": "4c4569978fb7d479e1c6aad6751e372a6028b073304a5fd562d73f3d9f22428f",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2021-32840",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2021-32840",
"summary": "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.",
"evidence": "osv:UBUNTU-CVE-2021-32840",
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"severity": "critical",
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"aliases": [
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"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L"
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{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
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{
"type": "Ubuntu",
"score": "medium"
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