What’s Vulnerable › Vulnerabilities

CVE-2017-5923

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2017-04-03 · updated 2026-06-17
• Weakness: CWE-125

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.

Affected products

• Yara Object: 3.5.0

References

• http://www.securityfocus.com/bid/98080
• https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636
• https://github.com/VirusTotal/yara/issues/597
• http://www.securityfocus.com/bid/98080
• https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636
• https://github.com/VirusTotal/yara/issues/597

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