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ubuntucveUbuntu.comUB:CVE-2021-32841
HistoryJan 26, 2022 - 12:00 a.m.

CVE-2021-32841

2022-01-2600:00:00
ubuntu.com
ubuntu.com
7
sharpziplib
directory traversal
cve-2021-32841
file creation
unix

CVSS2

5

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

5.3

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

0.001

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.

OSVersionArchitecturePackageVersionFilename
ubuntu22.04noarchmono< anyUNKNOWN
ubuntu24.04noarchmono< anyUNKNOWN

CVSS2

5

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

5.3

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

0.001

Percentile

46.8%