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[email protected]CVE-2021-32841

HistoryJan 26, 2022 - 10:15 p.m.

CVE-2021-32841

2022-01-2622:15:07

CWE-22

[email protected]

web.nvd.nist.gov

sharpziplib

#ziplib

cve-2021-32841

zip library

gzip library

tar library

bzip2 library

directory traversal vulnerability

arbitrary file creation

5 Medium

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

5.3 Medium

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

5.2 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

42.1%

JSON

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.

Affected configurations

Vulners

NVD

Node

icsharpcodesharpziplibRange<1.3.3

icsharpcodesharpziplibRange<1.3.0*

CPENameOperatorVersion
sharpziplib_project:sharpziplibsharpziplib project sharpzipliblt1.3.3

CPE	Name	Operator	Version
sharpziplib_project:sharpziplib	sharpziplib project sharpziplib	lt	1.3.3

CNA Affected

[
  {
    "product": "sharpziplib",
    "vendor": "icsharpcode",
    "versions": [
      {
        "lessThan": "1.3.3",
        "status": "affected",
        "version": "1.3.3",
        "versionType": "custom"
      },
      {
        "lessThan": "1.3.0*",
        "status": "affected",
        "version": "1.3.0",
        "versionType": "custom"
      }
    ]
  }
]