CVE-1999-1231
First published: Wed Jun 09 1999(Updated: )
ssh 2.0.12, and possibly other versions, allows valid user names to attempt to enter the correct password multiple times, but only prompts an invalid user name for a password once, which allows remote attackers to determine user account names on the server.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| SSH (Secure Shell) | =2.0 | |
| SSH (Secure Shell) | =2.0.1 | |
| SSH (Secure Shell) | =2.0.2 | |
| SSH (Secure Shell) | =2.0.3 | |
| SSH (Secure Shell) | =2.0.4 | |
| SSH (Secure Shell) | =2.0.5 | |
| SSH (Secure Shell) | =2.0.6 | |
| SSH (Secure Shell) | =2.0.7 | |
| SSH (Secure Shell) | =2.0.8 | |
| SSH (Secure Shell) | =2.0.9 | |
| SSH (Secure Shell) | =2.0.10 | |
| SSH (Secure Shell) | =2.0.11 | |
| SSH (Secure Shell) | =2.0.12 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-1999-1231?
CVE-1999-1231 is considered a moderate severity vulnerability due to its potential to expose user account names.
How do I fix CVE-1999-1231?
To mitigate CVE-1999-1231, upgrade to a fixed version of SSH that addresses this user enumeration issue.
What versions of SSH are affected by CVE-1999-1231?
CVE-1999-1231 affects SSH versions 2.0.12 and prior, including several version 2.0 releases.
What type of vulnerability is CVE-1999-1231?
CVE-1999-1231 is an information disclosure vulnerability that allows attackers to enumerate valid usernames.
Who should be concerned about CVE-1999-1231?
System administrators using affected versions of SSH should be concerned about CVE-1999-1231 as it can compromise user account security.
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- agent/software-canonical-lookup-request
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-historical
- vendor/ssh
- canonical/ssh (secure shell)
- version/ssh (secure shell)/2.0
- version/ssh (secure shell)/2.0.1
- version/ssh (secure shell)/2.0.2
- version/ssh (secure shell)/2.0.3
- version/ssh (secure shell)/2.0.4
- version/ssh (secure shell)/2.0.5
- version/ssh (secure shell)/2.0.6
- version/ssh (secure shell)/2.0.7
- version/ssh (secure shell)/2.0.8
- version/ssh (secure shell)/2.0.9
- version/ssh (secure shell)/2.0.10
- version/ssh (secure shell)/2.0.11
- version/ssh (secure shell)/2.0.12