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Advisories

GNU Wget 1.25.0 Heap Buffer Underread via Metalink URL Parsing

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severity
high
date
Affecting

  • Wget <= 1.25.0, fixed in commit 37a40fc

CWE
  • CWE-125 Out-of-bounds Read
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
Credit
Tristan Madani
Description
GNU Wget through 1.25.0, fixed in commit 37a40fc, contains a heap buffer underread vulnerability in the clean_metalink_string() function within src/metalink.c that allows a malicious server to trigger memory corruption by serving a Metalink document containing a whitespace-only URL. Attackers can cause the function to decrement a pointer past the start of the buffer when processing an all-whitespace Metalink URL, potentially leading to abnormal program behavior.

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