libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_parser_lookup_loop_variable function
Published Apr 3, 2017
7.5
HIGHCVSS 3.0
EPSS 1.59%
Description
libyara/grammar.y in YARA 3.5.0 allows remote attackers to cause a denial of service (use-after-free and application crash) via a crafted rule that is mishandled in the yr_parser_lookup_loop_variable 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
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.59% (0.01587) | 74.72th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.60% (0.01601) | 72.56th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.79% (0.00787) | 71.60th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.02% (0.02015) | 72.92th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.79% (0.00787) | 72.17th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.62% (0.00620) | 79.53th | 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) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (3)
- http://www.securityfocus.com/bid/98078 vdb-entryx_refsource_BID
- https://github.com/VirusTotal/yara/commit/890c3f850293176c0e996a602ffa88b315f4e98f x_refsource_CONFIRMPatchVendor Advisory
- https://github.com/VirusTotal/yara/issues/575 x_refsource_CONFIRMExploitIssue TrackingPatch
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/98078 | vdb-entryx_refsource_BID | |
| https://github.com/VirusTotal/yara/commit/890c3f850293176c0e996a602ffa88b315f4e98f | x_refsource_CONFIRMPatchVendor Advisory | |
| https://github.com/VirusTotal/yara/issues/575 | x_refsource_CONFIRMExploitIssue TrackingPatch |
Change history (0)
No recorded changes yet.