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Advisories

OW2 ASM 3.0 before 9.11 Quadratic Memory Allocation via Exception Handlers

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Severity
medium
Date
Affecting

  • ASM >= 3.0, < 9.11

CWE
  • CWE-407 Inefficient Algorithmic Complexity
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
Yu Bao, PayPal Cyber Security Team
Description
OW2 ASM 3.0 before 9.11 contains a quadratic memory allocation vulnerability in MethodWriter.computeMaxStackAndLocal() and computeAllFrames() when using COMPUTE_MAXS or COMPUTE_FRAMES. Attackers can supply a crafted class file with thousands of overlapping exception handlers, causing excessive Edge allocations and an OutOfMemoryError that crashes the JVM.

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