OpenSSH 4.6 and earlier, when ChallengeResponseAuthentication is enabled, allows remote attackers to determine the existence of user accounts by attempting to authenticate via S/KEY, which displays a different response if the user account exists, a similar issue to CVE-2001-1483.
Weakness
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openssh | Openbsd | 1.2 (including) | 1.2 (including) |
| Openssh | Openbsd | 1.2.1 (including) | 1.2.1 (including) |
| Openssh | Openbsd | 1.2.2 (including) | 1.2.2 (including) |
| Openssh | Openbsd | 1.2.3 (including) | 1.2.3 (including) |
| Openssh | Openbsd | 1.2.27 (including) | 1.2.27 (including) |
| Openssh | Openbsd | 2.1 (including) | 2.1 (including) |
| Openssh | Openbsd | 2.1.1 (including) | 2.1.1 (including) |
| Openssh | Openbsd | 2.2 (including) | 2.2 (including) |
| Openssh | Openbsd | 2.3 (including) | 2.3 (including) |
| Openssh | Openbsd | 2.5 (including) | 2.5 (including) |
| Openssh | Openbsd | 2.5.1 (including) | 2.5.1 (including) |
| Openssh | Openbsd | 2.5.2 (including) | 2.5.2 (including) |
| Openssh | Openbsd | 2.9 (including) | 2.9 (including) |
| Openssh | Openbsd | 2.9.9 (including) | 2.9.9 (including) |
| Openssh | Openbsd | 2.9.9p2 (including) | 2.9.9p2 (including) |
| Openssh | Openbsd | 2.9p1 (including) | 2.9p1 (including) |
| Openssh | Openbsd | 2.9p2 (including) | 2.9p2 (including) |
| Openssh | Openbsd | 3.0 (including) | 3.0 (including) |
| Openssh | Openbsd | 3.0.1 (including) | 3.0.1 (including) |
| Openssh | Openbsd | 3.0.1p1 (including) | 3.0.1p1 (including) |
| Openssh | Openbsd | 3.0.2 (including) | 3.0.2 (including) |
| Openssh | Openbsd | 3.0.2p1 (including) | 3.0.2p1 (including) |
| Openssh | Openbsd | 3.0p1 (including) | 3.0p1 (including) |
| Openssh | Openbsd | 3.1 (including) | 3.1 (including) |
| Openssh | Openbsd | 3.1p1 (including) | 3.1p1 (including) |
| Openssh | Openbsd | 3.2 (including) | 3.2 (including) |
| Openssh | Openbsd | 3.2.2 (including) | 3.2.2 (including) |
| Openssh | Openbsd | 3.2.2p1 (including) | 3.2.2p1 (including) |
| Openssh | Openbsd | 3.2.3p1 (including) | 3.2.3p1 (including) |
| Openssh | Openbsd | 3.3 (including) | 3.3 (including) |
| Openssh | Openbsd | 3.3p1 (including) | 3.3p1 (including) |
| Openssh | Openbsd | 3.4 (including) | 3.4 (including) |
| Openssh | Openbsd | 3.4p1 (including) | 3.4p1 (including) |
| Openssh | Openbsd | 3.5 (including) | 3.5 (including) |
| Openssh | Openbsd | 3.5p1 (including) | 3.5p1 (including) |
| Openssh | Openbsd | 3.6 (including) | 3.6 (including) |
| Openssh | Openbsd | 3.6.1 (including) | 3.6.1 (including) |
| Openssh | Openbsd | 3.6.1p1 (including) | 3.6.1p1 (including) |
| Openssh | Openbsd | 3.6.1p2 (including) | 3.6.1p2 (including) |
| Openssh | Openbsd | 3.7 (including) | 3.7 (including) |
| Openssh | Openbsd | 3.7.1 (including) | 3.7.1 (including) |
| Openssh | Openbsd | 3.7.1p1 (including) | 3.7.1p1 (including) |
| Openssh | Openbsd | 3.7.1p2 (including) | 3.7.1p2 (including) |
| Openssh | Openbsd | 3.8 (including) | 3.8 (including) |
| Openssh | Openbsd | 3.8.1 (including) | 3.8.1 (including) |
| Openssh | Openbsd | 3.8.1p1 (including) | 3.8.1p1 (including) |
| Openssh | Openbsd | 3.9 (including) | 3.9 (including) |
| Openssh | Openbsd | 3.9.1 (including) | 3.9.1 (including) |
| Openssh | Openbsd | 3.9.1p1 (including) | 3.9.1p1 (including) |
| Openssh | Openbsd | 4.0 (including) | 4.0 (including) |
| Openssh | Openbsd | 4.0p1 (including) | 4.0p1 (including) |
| Openssh | Openbsd | 4.1 (including) | 4.1 (including) |
| Openssh | Openbsd | 4.1p1 (including) | 4.1p1 (including) |
| Openssh | Openbsd | 4.2 (including) | 4.2 (including) |
| Openssh | Openbsd | 4.2p1 (including) | 4.2p1 (including) |
| Openssh | Openbsd | 4.3 (including) | 4.3 (including) |
| Openssh | Openbsd | 4.3p1 (including) | 4.3p1 (including) |
| Openssh | Openbsd | 4.3p2 (including) | 4.3p2 (including) |
| Openssh | Openbsd | 4.4 (including) | 4.4 (including) |
| Openssh | Openbsd | 4.4p1 (including) | 4.4p1 (including) |
| Openssh | Openbsd | 4.5 (including) | 4.5 (including) |
| Openssh | Openbsd | 4.6 (including) | 4.6 (including) |
| Openssh | Ubuntu | dapper | * |
| Openssh | Ubuntu | devel | * |
| Openssh | Ubuntu | edgy | * |
| Openssh | Ubuntu | feisty | * |
| Openssh | Ubuntu | gutsy | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/114.html
- https://cwe.mitre.org/data/definitions/115.html
- https://cwe.mitre.org/data/definitions/151.html
- https://cwe.mitre.org/data/definitions/194.html
- https://cwe.mitre.org/data/definitions/22.html
- https://cwe.mitre.org/data/definitions/57.html
- https://cwe.mitre.org/data/definitions/593.html
- https://cwe.mitre.org/data/definitions/633.html
- https://cwe.mitre.org/data/definitions/650.html
- https://cwe.mitre.org/data/definitions/94.html
References
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html
- http://securityreason.com/securityalert/2631
- http://www.osvdb.org/34600
- http://www.securityfocus.com/bid/23601
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33794
- https://security.netapp.com/advisory/ntap-20191107-0003/
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053906.html
- http://lists.grok.org.uk/pipermail/full-disclosure/2007-April/053951.html
- http://securityreason.com/securityalert/2631
- http://www.osvdb.org/34600
- http://www.securityfocus.com/bid/23601
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33794
- https://security.netapp.com/advisory/ntap-20191107-0003/