Cisco IOS 12.0 through 12.2, when supporting SSH, allows remote attackers to cause a denial of service (CPU consumption) via a large packet that was designed to exploit the SSH CRC32 attack detection overflow (CVE-2001-0144)
Published Apr 2, 2003
7.1
HIGHCVSS 2.0
EPSS 3.30%
Description
Cisco IOS 12.0 through 12.2, when supporting SSH, allows remote attackers to cause a denial of service (CPU consumption) via a large packet that was designed to exploit the SSH CRC32 attack detection overflow (CVE-2001-0144).
Affected products
No data.
Configuration 1
- 12.0s
- 12.0sp
- 12.0st
- 12.0xb
- 12.0xm
- 12.0xv
- 12.1\(1\)ex
- 12.1\(5c\)ex
- 12.1\(8a\)ex
- 12.1\(9\)ex
- 12.1e
- 12.1ec
- 12.1t
- 12.1xb
- 12.1xc
- 12.1xf
- 12.1xg
- 12.1xh
- 12.1xi
- 12.1xj
- 12.1xl
- 12.1xm
- 12.1xp
- 12.1xq
- 12.1xt
- 12.1xu
- 12.1yb
- 12.1yc
- 12.1yd
- 12.1ye
- 12.1yf
- 12.1yi
- 12.2
- 12.2b
- 12.2bc
- 12.2da
- 12.2dd
- 12.2s
- 12.2t
- 12.2xa
- 12.2xb
- 12.2xd
- 12.2xe
- 12.2xf
- 12.2xg
- 12.2xh
- 12.2xi
- 12.2xj
- 12.2xk
- 12.2xl
- 12.2xm
- 12.2xn
- 12.2xq
- 12.2xr
- 12.2xs
- 12.2xt
- 12.2xw
- 12.2ya
- 12.2yb
- 12.2yc
- 12.2yd
- 12.2yf
- 12.2yg
- 12.2yh
- 5.2
- 5.3
- 6.0
- 6.1
- 6.2
- n/a
Configuration 2
- 5.3\(1\)csx
- 5.3\(1a\)csx
- 5.3\(2\)csx
- 5.3\(3\)csx
- 5.3\(4\)csx
- 5.3\(5\)csx
- 5.3\(5a\)csx
- 5.3\(6\)csx
- 5.4
- 5.4\(1\)
- 5.4\(2\)
- 5.4\(3\)
- 5.4\(4\)
- 5.5
- 5.5\(1\)
- 5.5\(2\)
- 5.5\(3\)
- 5.5\(4\)
- 5.5\(4a\)
- 5.5\(4b\)
- 5.5\(13\)
- 6.1\(1\)
- 6.1\(1a\)
- 6.1\(1b\)
- 6.1\(1c\)
- 6.1\(2.13\)
- 6.2\(0.110\)
- 6.2\(0.111\)
- 6.3\(0.7\)pan
- 6.3\(4\)
- 7.1
- 7.1\(2\)
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.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:N/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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.30% (0.03297) | 88.10th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.30% (0.03297) | 86.87th | v5 (v2026.06.15) |
| Dec 17, 2025 | 4.87% (0.04874) | 89.19th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.16% (0.01163) | 77.13th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.92% (0.00923) | 83.62th | v3 (v2023.03.01) |
| Jan 29, 2024 | 0.92% (0.00923) | 81.23th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.73% (0.00731) | 77.77th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (4)
- http://www.cisco.com/warp/public/707/SSH-scanning.shtml vendor-advisoryx_refsource_CISCO
- http://www.iss.net/security_center/static/9437.php vdb-entryx_refsource_XFPatchVendor Advisory
- http://www.kb.cert.org/vuls/id/290140 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.securityfocus.com/bid/5114 vdb-entryx_refsource_BIDPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.cisco.com/warp/public/707/SSH-scanning.shtml | vendor-advisoryx_refsource_CISCO | |
| http://www.iss.net/security_center/static/9437.php | vdb-entryx_refsource_XFPatchVendor Advisory | |
| http://www.kb.cert.org/vuls/id/290140 | third-party-advisoryx_refsource_CERT-VNUS Government Resource | |
| http://www.securityfocus.com/bid/5114 | vdb-entryx_refsource_BIDPatchVendor Advisory |
Change history (0)
No recorded changes yet.