YARA 'yara_yyparse()' Function Denial of Service Vulnerability

Bugtraq ID:	98080
Class:	Design Error
CVE:	CVE-2017-5923
Remote:	Yes
Local:	No
Published:	Apr 10 2017 12:00AM
Updated:	May 02 2017 12:11AM
Credit:	The vendor reported this issue.
Vulnerable:	VirusTotal Yara 3.5
Not Vulnerable:

YARA 'yara_yyparse()' Function Denial of Service Vulnerability

YARA is prone to a denial-of-service vulnerability.

Attackers can exploit this issue to crash the affected application, denying service to legitimate users.

YARA 3.5.0 is vulnerable; other versions may also be affected.

YARA 'yara_yyparse()' Function Denial of Service Vulnerability

Currently, we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

YARA 'yara_yyparse()' Function Denial of Service Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

YARA 'yara_yyparse()' Function Denial of Service Vulnerability

References:

• Fix issue #597 (VirusTotal)
  
• Heap out of bounds read in yara_yyparse() #597 (VirusTotal)
  
• Yara Product Page (VirusTotal)