HIGH
Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of service (device reload) (1) via a username that contains a domain name when using a TACACS+ server to authenticate, (2) when a new SSH session is in the login phase and a currently logged in user issues a send command, or (3) when IOS is logging messages and an SSH session is terminated while the server is sending data
Published Apr 9, 2005
7.1
HIGHCVSS 2.0
EPSS 1.73%
Description
Secure Shell (SSH) 2 in Cisco IOS 12.0 through 12.3 allows remote attackers to cause a denial of service (device reload) (1) via a username that contains a domain name when using a TACACS+ server to authenticate, (2) when a new SSH session is in the login phase and a currently logged in user issues a send command, or (3) when IOS is logging messages and an SSH session is terminated while the server is sending data.
Affected products
No data.
OR
- 12.0
- 12.0\(23\)s4
- 12.0\(23\)s5
- 12.0\(24\)s1
- 12.0\(24\)s4
- 12.0\(24\)s5
- 12.0\(24.2\)s
- 12.0\(26\)s1
- 12.0\(27\)s
- 12.0\(27\)sv
- 12.0\(27\)sv1
- 12.0da
- 12.0db
- 12.0dc
- 12.0s
- 12.0sc
- 12.0sl
- 12.0sp
- 12.0st
- 12.0sv
- 12.0sx
- 12.0sy
- 12.0sz
- 12.0t
- 12.0w5
- 12.0wc
- 12.0wt
- 12.0wx
- 12.0xa
- 12.0xb
- 12.0xc
- 12.0xd
- 12.0xe
- 12.0xf
- 12.0xg
- 12.0xh
- 12.0xi
- 12.0xj
- 12.0xk
- 12.0xl
- 12.0xm
- 12.0xn
- 12.0xp
- 12.0xq
- 12.0xr
- 12.0xs
- 12.0xt
- 12.0xu
- 12.0xv
- 12.0xw
- 12.1
- 12.1\(11\)e
- 12.1\(11b\)e
- 12.1\(11b\)e12
- 12.1\(11b\)e14
- 12.1\(13\)e9
- 12.1\(19\)e1
- 12.1\(20\)e
- 12.1\(20\)e1
- 12.1\(20\)e2
- 12.1\(20\)ea1
- 12.1\(20\)ec
- 12.1\(20\)ec1
- 12.1\(20\)eo
- 12.1\(20\)ew
- 12.1\(20\)ew1
- 12.1aa
- 12.1ax
- 12.1ay
- 12.1az
- 12.1cx
- 12.1da
- 12.1db
- 12.1dc
- 12.1e
- 12.1ea
- 12.1eb
- 12.1ec
- 12.1eo
- 12.1eu
- 12.1ev
- 12.1ew
- 12.1ex
- 12.1ey
- 12.1m
- 12.1t
- 12.1xa
- 12.1xb
- 12.1xc
- 12.1xd
- 12.1xe
- 12.1xf
- 12.1xg
- 12.1xh
- 12.1xi
- 12.1xj
- 12.1xk
- 12.1xl
- 12.1xm
- 12.1xp
- 12.1xq
- 12.1xr
- 12.1xs
- 12.1xt
- 12.1xu
- 12.1xv
- 12.1xw
- 12.1xx
- 12.1xy
- 12.1xz
- 12.1ya
- 12.1yb
- 12.1yc
- 12.1yd
- 12.1ye
- 12.1yf
- 12.1yh
- 12.1yi
- 12.1yj
- 12.2
- 12.2\(1\)xa
- 12.2\(1\)xd
- 12.2\(1\)xd1
- 12.2\(1\)xd3
- 12.2\(1\)xd4
- 12.2\(1\)xe
- 12.2\(1\)xe2
- 12.2\(1\)xe3
- 12.2\(1\)xh
- 12.2\(1\)xq
- 12.2\(1\)xs
- 12.2\(1\)xs1
- 12.2\(2\)t4
- 12.2\(2\)xa
- 12.2\(2\)xa1
- 12.2\(2\)xa5
- 12.2\(2\)xb
- 12.2\(2\)xb3
- 12.2\(2\)xb4
- 12.2\(2\)xf
- 12.2\(2\)xg
- 12.2\(2\)xh
- 12.2\(2\)xh2
- 12.2\(2\)xh3
- 12.2\(2\)xi
- 12.2\(2\)xi1
- 12.2\(2\)xi2
- 12.2\(2\)xj
- 12.2\(2\)xj1
- 12.2\(2\)xk
- 12.2\(2\)xk2
- 12.2\(2\)xn
- 12.2\(2\)xt
- 12.2\(2\)xt3
- 12.2\(2\)xu
- 12.2\(2\)xu2
- 12.2\(4\)ja
- 12.2\(4\)ja1
- 12.2\(8\)ja
- 12.2\(11\)ja
- 12.2\(11\)ja1
- 12.2\(11\)t
- 12.2\(12g\)
- 12.2\(12h\)
- 12.2\(14\)sy
- 12.2\(14\)sy1
- 12.2\(14\)sz
- 12.2\(14\)za
- 12.2\(14\)za2
- 12.2\(14.5\)
- 12.2\(14.5\)t
- 12.2\(15\)zn
- 12.2\(15.1\)s
- 12.2\(16\)b
- 12.2\(16.1\)b
- 12.2\(17a\)sxa
- 12.2\(18\)ew
- 12.2\(18\)ewa
- 12.2\(18\)s
- 12.2\(18\)se
- 12.2\(18\)sv
- 12.2\(18\)sw
- 12.2\(20\)ew
- 12.2\(20\)s
- 12.2\(20\)s1
- 12.2\(21\)
- 12.2\(21a\)
- 12.2\(23\)
- 12.2b
- 12.2bc
- 12.2bw
- 12.2bx
- 12.2by
- 12.2bz
- 12.2cx
- 12.2cy
- 12.2cz
- 12.2da
- 12.2dd
- 12.2dx
- 12.2ew
- 12.2ewa
- 12.2ja
- 12.2jk
- 12.2mb
- 12.2mc
- 12.2mx
- 12.2s
- 12.2se
- 12.2su
- 12.2sv
- 12.2sw
- 12.2sx
- 12.2sxa
- 12.2sxb
- 12.2sxd
- 12.2sy
- 12.2sz
- 12.2t
- 12.2x
- 12.2xa
- 12.2xb
- 12.2xc
- 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
- 12.2xu
- 12.2xw
- 12.2xz
- 12.2ya
- 12.2yb
- 12.2yc
- 12.2yd
- 12.2ye
- 12.2yf
- 12.2yg
- 12.2yh
- 12.2yj
- 12.2yk
- 12.2yl
- 12.2ym
- 12.2yn
- 12.2yo
- 12.2yp
- 12.2yq
- 12.2yr
- 12.2ys
- 12.2yt
- 12.2yu
- 12.2yv
- 12.2yw
- 12.2yx
- 12.2yy
- 12.2yz
- 12.2za
- 12.2zb
- 12.2zc
- 12.2zd
- 12.2ze
- 12.2zf
- 12.2zg
- 12.2zh
- 12.2zi
- 12.2zj
- 12.2zk
- 12.2zl
- 12.2zm
- 12.2zn
- 12.2zo
- 12.2zp
- 12.2zq
- 12.3
- 12.3\(2\)t3
- 12.3\(2\)xc1
- 12.3\(2\)xc2
- 12.3\(4\)t
- 12.3\(4\)t1
- 12.3\(4\)t2
- 12.3\(4\)t3
- 12.3\(4\)xd
- 12.3\(4\)xd1
- 12.3\(5\)
- 12.3\(5a\)
- 12.3\(5a\)b
- 12.3\(5b\)
- 12.3\(6\)
- 12.3b
- 12.3bc
- 12.3bw
- 12.3j
- 12.3ja
- 12.3t
- 12.3xa
- 12.3xb
- 12.3xc
- 12.3xd
- 12.3xe
- 12.3xf
- 12.3xg
- 12.3xh
- 12.3xi
- 12.3xj
- 12.3xk
- 12.3xl
- 12.3xm
- 12.3xn
- 12.3xq
- 12.3xr
- 12.3xs
- 12.3xt
- 12.3xu
- 12.3xv
- 12.3xw
- 12.3xx
- 12.3xy
- 12.3xz
- 12.3ya
- 12.3yc
- 12.3yd
- 12.3ye
- 12.3yf
- 12.3yg
- 12.3yh
- 12.3yj
- 12.3yl
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.
7.1 HIGH NVD
AV:N/AC:M/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.73% 0.01729
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.01729
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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 1.73% (0.01729) | 76.78th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.73% (0.01729) | 74.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.58% (0.01580) | 80.32th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.12% (0.03116) | 90.86th | v3 (v2023.03.01) |
| Mar 16, 2024 | 2.02% (0.02015) | 88.59th | v3 (v2023.03.01) |
| Mar 7, 2023 | 2.81% (0.02811) | 89.03th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.41% (0.01408) | 72.89th | v2 (v2022.01.01) |
| Mar 2, 2023 | 1.41% (0.01408) | 72.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.41% (0.01408) | 70.87th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01408) | 49.94th | v2 (v2022.01.01) |
Weaknesses (1)
References (8)
- http://secunia.com/advisories/14854 third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory
- http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml vendor-advisoryx_refsource_CISCOVendor Advisory
- http://www.securityfocus.com/bid/13043 vdb-entryx_refsource_BID
- http://www.securitytracker.com/alerts/2005/Apr/1013655.html vdb-entryx_refsource_SECTRACKVendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/19987 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/19989 vdb-entryx_refsource_XF
- https://exchange.xforce.ibmcloud.com/vulnerabilities/19990 vdb-entryx_refsource_XF
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://secunia.com/advisories/14854 | third-party-advisoryx_refsource_SECUNIAPatchVendor Advisory | |
| http://www.cisco.com/warp/public/707/cisco-sa-20050406-ssh.shtml | vendor-advisoryx_refsource_CISCOVendor Advisory | |
| http://www.securityfocus.com/bid/13043 | vdb-entryx_refsource_BID | |
| http://www.securitytracker.com/alerts/2005/Apr/1013655.html | vdb-entryx_refsource_SECTRACKVendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/19987 | vdb-entryx_refsource_XF | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/19989 | vdb-entryx_refsource_XF | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/19990 | vdb-entryx_refsource_XF | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5455 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Apr 9, 2005
Updated Aug 7, 2024
Reserved Apr 10, 2005
Link CVE-2005-1020
CISA Vulnrichment
Updated n/a