CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
Percentile
46.8%
SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting
version 1.3.0 and prior to version 1.3.3, a check was added if the
destination file is under destination directory. However, it is not
enforced that destDir
ends with slash. If the destDir
is not slash
terminated like /home/user/dir
it is possible to create a file with a
name thats begins with the destination directory, i.e. /home/user/dir.sh
.
Because of the file name and destination directory constraints, the
arbitrary file creation impact is limited and depends on the use case.
Version 1.3.3 contains a patch for this vulnerability.
github.com/icsharpcode/SharpZipLib/commit/5c3b293de5d65b108e7f2cd0ea8f81c1b8273f78
github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
launchpad.net/bugs/cve/CVE-2021-32841
nvd.nist.gov/vuln/detail/CVE-2021-32841
security-tracker.debian.org/tracker/CVE-2021-32841
securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/
www.cve.org/CVERecord?id=CVE-2021-32841
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
Percentile
46.8%