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Advisories

Dulwich before 1.2.9 Infinite Loop DoS via Pack.resolve_object

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Severity
high
Date
Affecting

  • dulwich >= 0, < 1.2.9

CWE
  • CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS
7.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
LukeBanto
Description
Dulwich before 1.2.9 contains a denial of service vulnerability in Pack.resolve_object that allows attackers to cause infinite recursion via self-referential OFS_DELTA objects. Attackers can supply a malicious packfile with an OFS_DELTA delta_offset of 0 to exhaust CPU during clone, fetch, or cat-file operations.

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