Vulnerability Details : CVE-2017-8294
libyara/re.c in the regex component in YARA 3.5.0 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted rule that is mishandled in the yr_re_exec function.
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2017-8294
Probability of exploitation activity in the next 30 days: 0.47%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 72 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2017-8294
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST |
7.5
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2017-8294
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The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2017-8294
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https://github.com/VirusTotal/yara/issues/646
Out of bounds read in yr_re_exec() · Issue #646 · VirusTotal/yara · GitHubIssue Tracking;Patch
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http://www.securityfocus.com/bid/98072
YARA CVE-2017-8294 Denial of Service VulnerabilityThird Party Advisory;VDB Entry
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https://github.com/VirusTotal/yara/commit/83d799804648c2a0895d40a19835d9b757c6fa4e
Fix issue #646 (#648) · VirusTotal/yara@83d7998 · GitHubPatch
Products affected by CVE-2017-8294
- cpe:2.3:a:virustotal:yara:3.5.0:*:*:*:*:*:*:*