Out-of-bounds Read Affecting curl package, versions <8.9.0-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.08% (36th percentile)

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  • Snyk IDSNYK-ALPINE321-CURL-8483150
  • published6 Dec 2024
  • disclosed24 Jul 2024

Introduced: 24 Jul 2024

CVE-2024-6874  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Alpine:3.21 curl to version 8.9.0-r0 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:3.21 relevant fixed versions and status.

libcurl's URL API function curl_url_get() offers punycode conversions, to and from IDN. Asking to convert a name that is exactly 256 bytes, libcurl ends up reading outside of a stack based buffer when built to use the macidn IDN backend. The conversion function then fills up the provided buffer exactly - but does not null terminate the string.

This flaw can lead to stack contents accidently getting returned as part of the converted string.

CVSS Scores

version 3.1