Inappropriate Encoding for Output Context Affecting libcurl-minimal package, versions <0:7.87.0-2.amzn2023.0.2


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.1% (45th percentile)

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  • Snyk IDSNYK-AMZN2023-LIBCURLMINIMAL-3348242
  • published7 Mar 2023
  • disclosed2 Jun 2022

Introduced: 2 Jun 2022

CVE-2022-27780  (opens in a new tab)
CWE-838  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 libcurl-minimal to version 0:7.87.0-2.amzn2023.0.2 or higher.
This issue was patched in ALAS2023-2023-083.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl-minimal package and not the libcurl-minimal package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

The curl URL parser wrongly accepts percent-encoded URL separators like '/'when decoding the host name part of a URL, making it a different URL usingthe wrong host name when it is later retrieved.For example, a URL like http://example.com%2F127.0.0.1/, would be allowed bythe parser and get transposed into http://example.com/127.0.0.1/. This flawcan be used to circumvent filters, checks and more.

CVSS Scores

version 3.1