CVE-2018-19974
First published: Mon Dec 17 2018(Updated: )
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memory in libyara/exec.c. This can allow attackers to discover addresses in the real stack (not the YARA virtual stack).
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| VirusTotal | =3.8.1 |
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Reference Links
- https://bnbdr.github.io/posts/extracheese/
- https://github.com/VirusTotal/yara/issues/999
- https://github.com/bnbdr/swisscheese/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/
Frequently Asked Questions
What is the severity of CVE-2018-19974?
CVE-2018-19974 is considered a moderate severity vulnerability due to potential information disclosure.
How do I fix CVE-2018-19974?
To mitigate CVE-2018-19974, upgrade YARA to version 3.8.2 or later.
What software is affected by CVE-2018-19974?
CVE-2018-19974 affects YARA version 3.8.1.
What type of attack can CVE-2018-19974 facilitate?
CVE-2018-19974 can facilitate information disclosure by allowing attackers to read uninitialized data.
What does CVE-2018-19974 exploit in YARA?
CVE-2018-19974 exploits the ability of specially crafted bytecode to access VM scratch memory.
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