The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c
Published Dec 4, 2012
9.3
HIGHCVSS 2.0
EPSS 35.87%
Description
The SSH USERAUTH CHANGE REQUEST feature in SSH Tectia Server 6.0.4 through 6.0.20, 6.1.0 through 6.1.12, 6.2.0 through 6.2.5, and 6.3.0 through 6.3.2 on UNIX and Linux, when old-style password authentication is enabled, allows remote attackers to bypass authentication via a crafted session involving entry of blank passwords, as demonstrated by a root login session from a modified OpenSSH client with an added input_userauth_passwd_changereq call in sshconnect2.c.
Affected products
No data.
- 6.0.4
- 6.0.5
- 6.0.6
- 6.0.7
- 6.0.8
- 6.0.9
- 6.0.10
- 6.0.11
- 6.0.12
- 6.0.13
- 6.0.14
- 6.0.17
- 6.0.18
- 6.0.19
- 6.0.20.
- 6.1.0
- 6.1.1
- 6.1.2
- 6.1.3
- 6.1.4
- 6.1.5
- 6.1.6
- 6.1.7
- 6.1.8
- 6.1.9
- 6.1.12
- 6.2.0
- 6.2.1
- 6.2.2
- 6.2.3
- 6.2.4
- 6.2.5
- 6.3.0
- 6.3.1
- 6.3.2
Running on/with
- n/a
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: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 (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 35.87% (0.35874) | 98.42th | v5 (v2026.06.15) |
| Jun 15, 2026 | 35.87% (0.35874) | 98.26th | v5 (v2026.06.15) |
| Mar 30, 2025 | 25.75% (0.25747) | 95.79th | v4 (v2025.03.14) |
| Mar 29, 2025 | 37.72% (0.37721) | 95.74th | v4 (v2025.03.14) |
| Mar 19, 2025 | 25.75% (0.25747) | 95.59th | v4 (v2025.03.14) |
| Mar 17, 2025 | 24.23% (0.24232) | 95.62th | v4 (v2025.03.14) |
| Feb 16, 2025 | 35.77% (0.35766) | 97.22th | v3 (v2023.03.01) |
| Dec 23, 2024 | 37.19% (0.37192) | 97.21th | v3 (v2023.03.01) |
| Dec 17, 2024 | 46.96% (0.46963) | 97.53th | v3 (v2023.03.01) |
| Oct 30, 2024 | 45.79% (0.45793) | 97.52th | v3 (v2023.03.01) |
| Sep 17, 2024 | 47.91% (0.47911) | 97.52th | v3 (v2023.03.01) |
| May 24, 2024 | 60.08% (0.60080) | 97.77th | v3 (v2023.03.01) |
| May 10, 2024 | 59.25% (0.59252) | 97.73th | v3 (v2023.03.01) |
| Apr 25, 2024 | 54.95% (0.54947) | 97.61th | v3 (v2023.03.01) |
| Apr 12, 2024 | 51.26% (0.51257) | 97.50th | v3 (v2023.03.01) |
| Mar 15, 2024 | 51.58% (0.51575) | 97.48th | v3 (v2023.03.01) |
| Feb 8, 2024 | 47.43% (0.47429) | 97.33th | v3 (v2023.03.01) |
| Dec 29, 2023 | 44.16% (0.44156) | 97.04th | v3 (v2023.03.01) |
| Oct 25, 2023 | 49.14% (0.49137) | 97.12th | v3 (v2023.03.01) |
| Jun 22, 2023 | 47.45% (0.47446) | 96.94th | v3 (v2023.03.01) |
| Mar 10, 2023 | 49.36% (0.49356) | 96.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 42.42% (0.42421) | 96.70th | v3 (v2023.03.01) |
| Mar 6, 2023 | 73.02% (0.73021) | 99.27th | v2 (v2022.01.01) |
| Feb 18, 2023 | 73.02% (0.73021) | 99.26th | v2 (v2022.01.01) |
| Nov 17, 2022 | 73.60% (0.73596) | 99.26th | v2 (v2022.01.01) |
| Aug 15, 2022 | 75.35% (0.75349) | 99.29th | v2 (v2022.01.01) |
| May 8, 2022 | 76.69% (0.76690) | 99.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 78.27% (0.78265) | 99.35th | v2 (v2022.01.01) |
References (4)
- http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html mailing-listx_refsource_FULLDISC
- http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html mailing-listx_refsource_FULLDISC
- http://www.exploit-db.com/exploits/23082/ exploitx_refsource_EXPLOIT-DB
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb x_refsource_MISCExploit
| Link | Providers | Tags |
|---|---|---|
| http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0013.html | mailing-listx_refsource_FULLDISC | |
| http://archives.neohapsis.com/archives/fulldisclosure/2012-12/0065.html | mailing-listx_refsource_FULLDISC | |
| http://www.exploit-db.com/exploits/23082/ | exploitx_refsource_EXPLOIT-DB | |
| https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/unix/ssh/tectia_passwd_changereq.rb | x_refsource_MISCExploit |
Change history (0)
No recorded changes yet.