CVE-2017-5923

Public Exploit

Description

libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (heap-based out-of-bounds read and application crash) via a crafted rule that is mishandled in the yara_yyparse function.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.79% Top 30%
Vendor Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/VirusTotal/yara/issues/597 patch issue tracking exploit
http://www.securityfocus.com/bid/98080 vdb entry
https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-5923?
CVE-2017-5923 has been scored as a high severity vulnerability.
How to fix CVE-2017-5923?
To fix CVE-2017-5923, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-5923 being actively exploited in the wild?
It is possible that CVE-2017-5923 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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