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CVE-2017-5924

19
FAUCET Score

CVE-2017-5924 is a use-after-free vulnerability in YARA 3.5.0, specifically within the libyara/grammar.y component, affecting products like VirusTotal YARA. This high-severity flaw (CVSS 7.5) allows remote attackers to trigger a denial of service and application crash via a crafted rule, requiring no user interaction or privileges. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
3.5.0CPE matchmatch criteria
cpe:2.3:a:virustotal:yara:3.5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.60%
Probability of exploitation in next 30 days
EPSS Percentile
73.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0160 is in the 55th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
ubuntupatch availablevia ubuntu_usn
Product: yara (bionic)Fixed in: 3.7.1-1ubuntu2+esm1
ubuntupatch availablevia ubuntu_usn
Product: yara (focal)Fixed in: 3.9.0-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: yara (xenial)Fixed in: 3.4.0+dfsg-2ubuntu0.1~esm1

Vendor Advisories (1)

ubuntuUSN-8080-1

YARA vulnerabilities

Mar 9, 2026

References

github.com / VirusTotal/yara/commit/7f02eca670f29c00a1d2c305e96febae6ce5d37b
PatchVendor Advisory
github.com / VirusTotal/yara/issues/593
ExploitIssue TrackingPatch
securityfocus.com / bid/98075