MEDIUM
The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression
Published Aug 7, 2017
5.5
MEDIUMCVSS 3.0
EPSS 1.38%
Description
The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression.
Affected products
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:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact None
Availability Impact High
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.38% 0.01375
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.01375
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.38% (0.01375) | 71.03th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.32% (0.01321) | 67.06th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.47% (0.00474) | 62.70th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.47% (0.00467) | 76.33th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.47% (0.00467) | 74.78th | v3 (v2023.03.01) |
| Sep 3, 2023 | 0.47% (0.00466) | 72.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.27% (0.00273) | 62.90th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.62% (0.01623) | 33.90th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.62% (0.01623) | 0.00th | v1 |
Weaknesses (1)
References (4)
- https://bugzilla.clamav.net/show_bug.cgi?id=11798 x_refsource_MISCPermissions Required
- https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/use-after-free/clamav-use-after-free-pe.md x_refsource_MISCThird Party Advisory
- https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc x_refsource_MISCIssue TrackingPatchThird Party Advisory
- https://security.gentoo.org/glsa/201804-16 vendor-advisoryx_refsource_GENTOO
| Link | Providers | Tags |
|---|---|---|
| https://bugzilla.clamav.net/show_bug.cgi?id=11798 | x_refsource_MISCPermissions Required | |
| https://github.com/varsleak/varsleak-vul/blob/master/clamav-vul/use-after-free/clamav-use-after-free-pe.md | x_refsource_MISCThird Party Advisory | |
| https://github.com/vrtadmin/clamav-devel/commit/dfc00cd3301a42b571454b51a6102eecf58407bc | x_refsource_MISCIssue TrackingPatchThird Party Advisory | |
| https://security.gentoo.org/glsa/201804-16 | vendor-advisoryx_refsource_GENTOO |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 7, 2017
Updated Aug 5, 2024
Reserved Mar 1, 2017
Link CVE-2017-6420
CISA Vulnrichment
Updated n/a