CVE-2021-39208
SharpCompress Partial Path Traversal Vulnerability
Description
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.
INFO
Published Date :
Sept. 16, 2021, 3:15 p.m.
Last Modified :
Sept. 28, 2021, 12:40 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-39208.
| URL | Resource |
|---|---|
| https://github.com/adamhathcock/sharpcompress/pull/614 | Patch Third Party Advisory |
| https://github.com/adamhathcock/sharpcompress/releases/tag/0.29.0 | Release Notes Third Party Advisory |
| https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-jp7f-grcv-6mjf | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-39208 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39208 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 28, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:P/A:N) Changed Reference Type https://github.com/adamhathcock/sharpcompress/pull/614 No Types Assigned https://github.com/adamhathcock/sharpcompress/pull/614 Patch, Third Party Advisory Changed Reference Type https://github.com/adamhathcock/sharpcompress/releases/tag/0.29.0 No Types Assigned https://github.com/adamhathcock/sharpcompress/releases/tag/0.29.0 Release Notes, Third Party Advisory Changed Reference Type https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-jp7f-grcv-6mjf No Types Assigned https://github.com/adamhathcock/sharpcompress/security/advisories/GHSA-jp7f-grcv-6mjf Exploit, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:sharpcompress_project:sharpcompress:*:*:*:*:*:*:*:* versions up to (excluding) 0.29.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-39208 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-39208
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.02%
score
0.33387
percentile