MEDIUM
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c
Published Dec 17, 2018
5.5
MEDIUMCVSS 3.0
EPSS 1.37%
Description
In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memory, in libyara/exec.c. Specifically, OP_COUNT can read a DWORD.
Affected products
No data.
- 3.8.1
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.
5.5 MEDIUM NVD
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
7.1 HIGH NVD
AV:N/AC:M/Au:N/C:C/I:N/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.37% 0.01368
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01368
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 | 1.37% (0.01368) | 70.87th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.35% (0.01348) | 70.20th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.12% (0.00117) | 46.03th | v3 (v2023.03.01) |
| Dec 11, 2023 | 0.12% (0.00117) | 45.31th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.11% (0.00111) | 42.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.04% (0.01040) | 28.32th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.04% (0.01040) | 0.00th | v1 |
Weaknesses (1)
References (4)
- https://bnbdr.github.io/posts/extracheese/ x_refsource_MISCExploitThird Party Advisory
- https://github.com/VirusTotal/yara/issues/999 x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory
- https://github.com/bnbdr/swisscheese/ x_refsource_MISCExploitThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/ vendor-advisoryx_refsource_FEDORA
| Link | Providers | Tags |
|---|---|---|
| https://bnbdr.github.io/posts/extracheese/ | x_refsource_MISCExploitThird Party Advisory | |
| https://github.com/VirusTotal/yara/issues/999 | x_refsource_CONFIRMExploitIssue TrackingThird Party Advisory | |
| https://github.com/bnbdr/swisscheese/ | x_refsource_MISCExploitThird Party Advisory | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DFFXDAMP6GJ337LIOTVF5I4T6QGMN3ZR/ | vendor-advisoryx_refsource_FEDORA |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Dec 17, 2018
Updated Aug 5, 2024
Reserved Dec 8, 2018
Link CVE-2018-19975
CISA Vulnrichment
Updated n/a