MEDIUM
Off-by-one error in the cli_hm_scan function in matcher-hash.c in libclamav in ClamAV before 0.97.2 allows remote attackers to cause a denial of service (daemon crash) via an e-mail message that is not properly handled during certain hash calculations
Published Aug 5, 2011
5.0
MEDIUMCVSS 2.0
EPSS 3.38%
Description
Off-by-one error in the cli_hm_scan function in matcher-hash.c in libclamav in ClamAV before 0.97.2 allows remote attackers to cause a denial of service (daemon crash) via an e-mail message that is not properly handled during certain hash calculations.
Affected products
No data.
OR
- ≤ 0.97.1
- 0.01
- 0.02
- 0.3
- 0.03
- 0.05
- 0.8
- 0.9
- 0.10
- 0.12
- 0.13
- 0.14
- 0.14
- 0.15
- 0.20
- 0.21
- 0.22
- 0.23
- 0.24
- 0.51
- 0.52
- 0.53
- 0.54
- 0.60
- 0.60p
- 0.65
- 0.66
- 0.67
- 0.67-1
- 0.68
- 0.68.1
- 0.70
- 0.70
- 0.71
- 0.72
- 0.73
- 0.74
- 0.75
- 0.75.1
- 0.80
- 0.80
- 0.80
- 0.80
- 0.80
- 0.80
- 0.80_rc
- 0.81
- 0.81
- 0.82
- 0.83
- 0.84
- 0.84
- 0.84
- 0.85
- 0.85.1
- 0.86
- 0.86
- 0.86.1
- 0.86.2
- 0.87
- 0.87.1
- 0.88
- 0.88.1
- 0.88.2
- 0.88.3
- 0.88.4
- 0.88.5
- 0.88.6
- 0.88.7
- 0.88.7_p0
- 0.88.7_p1
- 0.90
- 0.90
- 0.90
- 0.90
- 0.90
- 0.90.1
- 0.90.1_p0
- 0.90.2
- 0.90.2_p0
- 0.90.3
- 0.90.3_p0
- 0.90.3_p1
- 0.91
- 0.91
- 0.91
- 0.91.1
- 0.91.2
- 0.91.2_p0
- 0.92
- 0.92.1
- 0.92_p0
- 0.93
- 0.93.1
- 0.93.2
- 0.93.3
- 0.94
- 0.94.1
- 0.94.2
- 0.95
- 0.95
- 0.95
- 0.95
- 0.95
- 0.95.1
- 0.95.2
- 0.95.3
- 0.96
- 0.96
- 0.96
- 0.96.1
- 0.96.2
- 0.96.3
- 0.96.4
- 0.96.5
- 0.97
- 0.97
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.
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
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.
3.38% 0.03377
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03377
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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.38% (0.03377) | 88.37th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.38% (0.03377) | 87.17th | v5 (v2026.06.15) |
| Feb 20, 2026 | 7.43% (0.07432) | 91.58th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.06% (0.03065) | 85.82th | v4 (v2025.03.14) |
| Dec 12, 2024 | 7.08% (0.07083) | 94.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 7.08% (0.07083) | 92.89th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
Weaknesses (1)
References (18)
- http://git.clamav.net/gitweb?p=clamav-devel.git%3Ba=blob_plain%3Bf=ChangeLog%3Bhb=clamav-0.97.2 x_refsource_CONFIRM
- http://git.clamav.net/gitweb?p=clamav-devel.git%3Ba=commit%3Bh=4842733eb3f09be61caeed83778bb6679141dbc5 x_refsource_CONFIRM
- http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068940.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068941.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-November/068942.html vendor-advisoryx_refsource_FEDORA
- http://secunia.com/advisories/45382 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/46717 third-party-advisoryx_refsource_SECUNIA
- http://securitytracker.com/id?1025858 vdb-entryx_refsource_SECTRACK
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:122 vendor-advisoryx_refsource_MANDRIVA
- http://www.openwall.com/lists/oss-security/2011/07/26/13 mailing-listx_refsource_MLISTPatch
- http://www.openwall.com/lists/oss-security/2011/07/26/3 mailing-listx_refsource_MLISTPatch
- http://www.osvdb.org/74181 vdb-entryx_refsource_OSVDB
- http://www.securityfocus.com/bid/48891 vdb-entryx_refsource_BID
- http://www.ubuntu.com/usn/USN-1179-1 vendor-advisoryx_refsource_UBUNTU
- https://bugzilla.novell.com/show_bug.cgi?id=708263 x_refsource_CONFIRMPatch
- https://bugzilla.redhat.com/show_bug.cgi?id=725694 x_refsource_CONFIRMPatch
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68785 vdb-entryx_refsource_XF
- https://wwws.clamav.net/bugzilla/show_bug.cgi?id=2818 x_refsource_CONFIRMPatch
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Aug 5, 2011
Updated Aug 6, 2024
Reserved Jul 11, 2011
Link CVE-2011-2721
CISA Vulnrichment
Updated n/a