Advisories

OW2 ASM 9.11 before 9.11.1 Denial of Service via Infinite Loop in Label.resolve()

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Severity
medium
Date
Affecting
  • ASM >= 9.11, < 9.11.1

CWE
  • CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS
6.8
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
Eric Bruneton
Description
OW2 ASM 9.11 before 9.11.1 contains an infinite loop vulnerability in Label.resolve() caused by 16-bit forward-reference offsets truncating when rewritten methods exceed 64 KB. Attackers can supply crafted class files whose transformed code grows past 65535 bytes, hanging ClassReader.accept() and denying service to build tools, instrumenters, agents, or analyzers.

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