Directory Traversal Affecting libcurl package, versions <0:7.61.1-12.104.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
2.44% (85th percentile)

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  • Snyk IDSNYK-AMZN201803-LIBCURL-5441489
  • published21 Apr 2023
  • disclosed30 Mar 2023

Introduced: 30 Mar 2023

CVE-2023-27534  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 libcurl to version 0:7.61.1-12.104.amzn1 or higher.
This issue was patched in ALAS-2023-1729.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde () character to be wrongly replaced when used as a prefix in the first path element, in addition to its intended use as the first element to indicate a path relative to the user's home directory. Attackers can exploit this flaw to bypass filtering or execute arbitrary code by crafting a path like /2/foo while accessing a server with a specific user.

CVSS Base Scores

version 3.1