A VMSF_DELTA memory corruption was discovered in unrar before 5.5.5, as used in Sophos Anti-Virus Threat Detection Engine before 3.37.2 and other products, that can lead to arbitrary code execution
Published Jun 22, 2017
9.8
CRITICALCVSS 3.0
EPSS 10.03%
Description
A VMSF_DELTA memory corruption was discovered in unrar before 5.5.5, as used in Sophos Anti-Virus Threat Detection Engine before 3.37.2 and other products, that can lead to arbitrary code execution. An integer overflow can be caused in DataSize+CurChannel. The result is a negative value of the "DestPos" variable, which allows the attacker to write out of bounds when setting Mem[DestPos].
Affected products
No data.
Configuration 1
- ≤ 3.36.2
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:H/I:H/A:H
AV:N/AC:L/Au:N/C:C/I:C/A:C
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 (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 10.03% (0.10027) | 95.48th | v5 (v2026.06.15) |
| Jun 15, 2026 | 10.03% (0.10027) | 95.00th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.06% (0.03061) | 85.51th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.31% (0.09308) | 87.79th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.44% (0.02435) | 84.06th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.76% (0.03761) | 91.70th | v3 (v2023.03.01) |
| Dec 2, 2024 | 4.93% (0.04929) | 93.08th | v3 (v2023.03.01) |
| Jul 4, 2024 | 3.15% (0.03149) | 91.18th | v3 (v2023.03.01) |
| Jun 2, 2023 | 2.42% (0.02417) | 88.37th | v3 (v2023.03.01) |
| May 2, 2023 | 2.44% (0.02445) | 88.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.45% (0.02451) | 88.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.91% (0.03910) | 85.66th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.91% (0.03910) | 84.19th | v2 (v2022.01.01) |
| Mar 19, 2022 | 3.91% (0.03910) | 68.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.81% (0.03806) | 67.27th | v2 (v2022.01.01) |
References (10)
- http://securitytracker.com/id?1027725 x_refsource_MISCThird Party Advisory
- http://telussecuritylabs.com/threats/show/TSL20121207-01 x_refsource_MISCThird Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1286 x_refsource_MISCExploitThird Party Advisory
- https://community.sophos.com/kb/en-us/118424#six x_refsource_MISCVendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10205 x_refsource_CONFIRM
- https://lock.cmpxchg8b.com/sophailv2.pdf x_refsource_MISCThird Party Advisory
- https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/ x_refsource_MISCVendor Advisory
- https://security.gentoo.org/glsa/201708-05 vendor-advisoryx_refsource_GENTOO
- https://security.gentoo.org/glsa/201709-24 vendor-advisoryx_refsource_GENTOO
- https://security.gentoo.org/glsa/201804-16 vendor-advisoryx_refsource_GENTOO
| Link | Providers | Tags |
|---|---|---|
| http://securitytracker.com/id?1027725 | x_refsource_MISCThird Party Advisory | |
| http://telussecuritylabs.com/threats/show/TSL20121207-01 | x_refsource_MISCThird Party Advisory | |
| https://bugs.chromium.org/p/project-zero/issues/detail?id=1286 | x_refsource_MISCExploitThird Party Advisory | |
| https://community.sophos.com/kb/en-us/118424#six | x_refsource_MISCVendor Advisory | |
| https://kc.mcafee.com/corporate/index?page=content&id=SB10205 | x_refsource_CONFIRM | |
| https://lock.cmpxchg8b.com/sophailv2.pdf | x_refsource_MISCThird Party Advisory | |
| https://nakedsecurity.sophos.com/2012/11/05/tavis-ormandy-sophos/ | x_refsource_MISCVendor Advisory | |
| https://security.gentoo.org/glsa/201708-05 | vendor-advisoryx_refsource_GENTOO | |
| https://security.gentoo.org/glsa/201709-24 | vendor-advisoryx_refsource_GENTOO | |
| https://security.gentoo.org/glsa/201804-16 | vendor-advisoryx_refsource_GENTOO |
Change history (0)
No recorded changes yet.