What is the vulnerability ID of this vulnerability?

The vulnerability ID of this vulnerability is CVE-2021-29136.

What is the severity of CVE-2021-29136?

The severity of CVE-2021-29136 is medium with a CVSS score of 5.5.

Which software is affected by CVE-2021-29136?

The Linuxfoundation Umoci versions up to and exclusive of 0.4.7 and Sylabs Singularity versions up to and exclusive of 3.7.3 are affected by CVE-2021-29136.

Vulnerability/
CVE-2021-29136

medium

5.5

CWE

6/4/2021

3/8/2024

CVE-2021-29136: Input Validation

Q: How can an attacker exploit CVE-2021-29136?

An attacker can exploit CVE-2021-29136 by using a crafted image that causes symlink traversal when "umoci unpack" or "umoci raw unpack" is used, allowing them to overwrite arbitrary host paths.

Q: Are there any references for CVE-2021-29136?

Yes, you can find references for CVE-2021-29136 at the following links: [Link 1](http://www.openwall.com/lists/oss-security/2021/04/06/2), [Link 2](https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57), [Link 3](https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v).

First published: Tue Apr 06 2021(Updated: )

Open Container Initiative umoci before 0.4.7 allows attackers to overwrite arbitrary host paths via a crafted image that causes symlink traversal when "umoci unpack" or "umoci raw unpack" is used.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Linuxfoundation Umoci	<0.4.7
Sylabs Singularity	<3.7.3

Remedy

http://www.openwall.com/lists/oss-security/2021/04/06/2

Remedy

https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57

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Reference Links

Frequently Asked Questions

What is the vulnerability ID of this vulnerability?
The vulnerability ID of this vulnerability is CVE-2021-29136.
What is the severity of CVE-2021-29136?
The severity of CVE-2021-29136 is medium with a CVSS score of 5.5.
Which software is affected by CVE-2021-29136?
The Linuxfoundation Umoci versions up to and exclusive of 0.4.7 and Sylabs Singularity versions up to and exclusive of 3.7.3 are affected by CVE-2021-29136.
How can an attacker exploit CVE-2021-29136?
An attacker can exploit CVE-2021-29136 by using a crafted image that causes symlink traversal when "umoci unpack" or "umoci raw unpack" is used, allowing them to overwrite arbitrary host paths.
Are there any references for CVE-2021-29136?
Yes, you can find references for CVE-2021-29136 at the following links: [Link 1](http://www.openwall.com/lists/oss-security/2021/04/06/2), [Link 2](https://github.com/opencontainers/umoci/commit/d9efc31daf2206f7d3fdb839863cf7a576a2eb57), [Link 3](https://github.com/opencontainers/umoci/security/advisories/GHSA-9m95-8hx6-7p9v).

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collector/mitre-cve
source/MITRE
vendor/linuxfoundation
canonical/linuxfoundation umoci
vendor/sylabs
canonical/sylabs singularity

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