Process crash via invalid read in free_lines
Published Mar 5, 2024 · Updated Aug 27, 2024
Use-after-free in the swfc utility in SWFTools 0.9.2 allows local users to crash the process via a crafted script file. The free_lines cleanup path reads an invalid address at swfshape.c:1094 after c_primitive passes malformed shape data through swf_RecodeShapeData. Exploitation requires a user to run swfc on attacker-supplied input; the demonstrated consequence is termination of that command-line process.
Summary
What happened
Use-after-free in the swfc utility in SWFTools 0.9.2 allows local users to crash the process via a crafted script file. The free_lines cleanup path reads an invalid address at swfshape.c:1094 after c_primitive passes malformed shape data through swf_RecodeShapeData. Exploitation requires a user to run swfc on attacker-supplied input; the demonstrated consequence is termination of that command-line process.
The record
- CVE
- CVE-2024-26333
- Published
- Mar 5, 2024
- Updated
- Aug 27, 2024
- Vendor
- SWFTools
- Product
- SWFTools
- Classifications
- CWE-416, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 5, 2024CVE publishedPublication date reported by the CVE source.
- Aug 27, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0.9.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- 2_poc.zip swfc crash proof-of-conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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