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
Published Apr 3, 2017
7.5
HIGHCVSS 3.0
EPSS 1.63%
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
No data.
- 3.5.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.63% (0.01633) | 75.40th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.63% (0.01633) | 75.20th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.62% (0.00620) | 79.06th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.62% (0.00620) | 78.17th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.62% (0.00620) | 75.55th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.30% (0.01300) | 31.12th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.30% (0.01300) | 0.00th | v1 |
References (3)
- http://www.securityfocus.com/bid/98080 vdb-entryx_refsource_BID
- https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636 x_refsource_CONFIRMPatchVendor Advisory
- https://github.com/VirusTotal/yara/issues/597 x_refsource_CONFIRMExploitIssue TrackingPatch
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/98080 | vdb-entryx_refsource_BID | |
| https://github.com/VirusTotal/yara/commit/ab906da53ff2a68c6fd6d1fa73f2b7c7bf0bc636 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://github.com/VirusTotal/yara/issues/597 | x_refsource_CONFIRMExploitIssue TrackingPatch |
Change history (0)
No recorded changes yet.