Improper Authentication Affecting curl package, versions <7.88.1-r1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ALPINE317-CURL-3364762
  • published20 Mar 2023
  • disclosed30 Mar 2023

Introduced: 20 Mar 2023

CVE-2023-27538  (opens in a new tab)
CWE-287  (opens in a new tab)

How to fix?

Upgrade Alpine:3.17 curl to version 7.88.1-r1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Alpine. See How to fix? for Alpine:3.17 relevant fixed versions and status.

An authentication bypass vulnerability exists in libcurl prior to v8.0.0 where it reuses a previously established SSH connection despite the fact that an SSH option was modified, which should have prevented reuse. libcurl maintains a pool of previously used connections to reuse them for subsequent transfers if the configurations match. However, two SSH settings were omitted from the configuration check, allowing them to match easily, potentially leading to the reuse of an inappropriate connection.

CVSS Scores

version 3.1