Detections
Analytics

Echo: SharpCompress: security update to 0.23.0+echo.1

medium Tenable Self-Hosted Container Security Plugin ID 474019

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - SharpCompress is a fully managed C# library to deal with many compression types and formats. Versions
 prior to 0.29.0 are vulnerable to partial path traversal. SharpCompress recreates a hierarchy of
 directories under destinationDirectory if ExtractFullPath is set to true in options. In order to prevent
 extraction outside the destination directory the destinationFileName path is verified to begin with
 fullDestinationDirectoryPath. However, prior to version 0.29.0, it is not enforced that
 fullDestinationDirectoryPath ends with slash. If the destinationDirectory is not slash terminated like
 `/home/user/dir` it is possible to create a file with a name thats begins as the destination directory one
 level up from the 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. This issue is fixed
 in SharpCompress version 0.29.0. (CVE-2021-39208)

Solution

Update the SharpCompress library and its related packages to version 0.23.0+echo.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2021-39208

Plugin Details

Severity: Medium

ID: 474019

Version: Revision 1.1

Type: Local

Published: 10/9/2026

Updated: 10/9/2026

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.1

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

CVSS Score Source: CVE-2021-39208

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.9

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 2.1

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/9/2026

Vulnerability Publication Date: 9/16/2021

Reference Information

CVE: CVE-2021-39208