CVE-2018-19975
First published: Mon Dec 17 2018(Updated: )
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c. Specifically, OP_COUNT can read a DWORD.
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-2018-19975?
CVE-2018-19975 is classified as a medium severity vulnerability due to the potential for arbitrary memory reads.
How do I fix CVE-2018-19975?
To fix CVE-2018-19975, update YARA to version 3.8.2 or later, where the vulnerability is resolved.
What software is affected by CVE-2018-19975?
CVE-2018-19975 affects YARA version 3.8.1, specifically developed by VirusTotal.
What is the impact of CVE-2018-19975 on systems?
The impact of CVE-2018-19975 includes the ability for crafted rules to exploit the bytecode execution and potentially expose sensitive data.
Is CVE-2018-19975 exploitable in all environments?
CVE-2018-19975 may be exploitable in environments where YARA 3.8.1 is used to process untrusted input.
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
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- vendor/virustotal
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- version/virustotal/3.8.1