CRITICAL
libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the EncodeFileName::Decode call within the Archive::ReadHeader15 function
Published Aug 18, 2017
9.8
CRITICALCVSS 3.0
EPSS 2.20%
Description
libunrar.a in UnRAR before 5.5.7 has an out-of-bounds read in the EncodeFileName::Decode call within the Archive::ReadHeader15 function.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.20% 0.02197
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02197
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.20% (0.02197) | 81.85th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.26% (0.02259) | 80.63th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.47% (0.00473) | 75.91th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00473) | 74.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.47% (0.00473) | 71.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00954) | 36.37th | v2 (v2022.01.01) |
| Sep 2, 2022 | 0.95% (0.00954) | 34.50th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00954) | 32.50th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00954) | 16.28th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.83% (0.00833) | 24.58th | v1 |
| Jan 6, 2022 | 0.83% (0.00833) | 23.96th | v1 |
| Sep 1, 2021 | 0.83% (0.00833) | 57.50th | v1 |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
Weaknesses (1)
References (3)
- http://seclists.org/oss-sec/2017/q3/290 x_refsource_MISCExploitMailing ListThird Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10241 x_refsource_CONFIRM
- https://security.gentoo.org/glsa/201709-24 vendor-advisoryx_refsource_GENTOO
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/oss-sec/2017/q3/290 | x_refsource_MISCExploitMailing ListThird Party Advisory | |
| https://kc.mcafee.com/corporate/index?page=content&id=SB10241 | x_refsource_CONFIRM | |
| https://security.gentoo.org/glsa/201709-24 | vendor-advisoryx_refsource_GENTOO |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 18, 2017
Updated Aug 5, 2024
Reserved Aug 18, 2017
Link CVE-2017-12940
CISA Vulnrichment
Updated n/a