Arbitrary Code Injection Affecting py3-urllib3 package, versions <1.25.9-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.21% (60th percentile)

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  • Snyk IDSNYK-ALPINE315-PY3URLLIB3-1927896
  • published2 Aug 2021
  • disclosed30 Sept 2020

Introduced: 30 Sep 2020

CVE-2020-26137  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Alpine:3.15 py3-urllib3 to version 1.25.9-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream py3-urllib3 package and not the py3-urllib3 package as distributed by Alpine. See How to fix? for Alpine:3.15 relevant fixed versions and status.

urllib3 before 1.25.9 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). NOTE: this is similar to CVE-2020-26116.

CVSS Scores

version 3.1