CVE-2017-5923

CVSS V2 Medium 5 CVSS V3 High 7.5

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.

Overview

CVE ID
CVE-2017-5923

Assigner
cve@mitre.org

Vulnerability Status
Modified

Published Version
2017-04-03T05:59:00

Last Modified Date
2017-05-02T01:59:02

Weakness Enumerations

CWE	URL
CWE-125	http://cwe.mitre.org/data/definitions/125.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:virustotal:yara:3.5.0:::::::*	1	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector
NETWORK

Access Compatibility
LOW

Authentication
NONE

Confidentiality Impact
NONE

Integrity Impact
NONE

Availability Impact
PARTIAL

Base Score
5

Severity
MEDIUM

Exploitability Score
10

Impact Score
2.9

CVSS Version 3

Version
3.0

Vector String
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
NONE

Availability Impact
HIGH

Base Score
7.5

Base Severity
HIGH

Exploitability Score
3.9

Impact Score
3.6

References

Reference URL	Reference Tags
https://github.com/VirusTotal/yara/issues/597	Exploit Issue Tracking Patch
https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636	Patch Vendor Advisory
http://www.securityfocus.com/bid/98080

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2017-5923
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5923

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 09:43:50				Added to TrackCVE
2022-12-02 15:27:36	2017-04-03T05:59Z	2017-04-03T05:59:00	CVE Published Date	updated
2022-12-02 15:27:36		2017-05-02T01:59:02	CVE Modified Date	updated
2022-12-02 15:27:36		Modified	Vulnerability Status	updated