Irssi hostname man-in-the-middle
| irssi-hostname-mitm (57790) |  Medium Risk |
Description:
Irssi is vulnerable to a man-in-the-middle attack, caused by the failure to check the hostname when establishing SSL connections. A remote attacker could exploit this vulnerability using unknown attack vectors to perform a man-in-the-middle attack.
*CVSS:
| Base Score: | 6.8 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Irssi (0.8.15 or later), available from the Irssi Web site. See References.
References:
- Irssi Web site: Irssi 0.8.15 Released.
- BID-39377: Irssi Denial of Service and SSL Hostname Verification Security Bypass Vulnerabilities
- CVE-2010-1155: Irssi before 0.8.15, when SSL is used, does not verify that the server hostname matches a domain name in the subject's Common Name (CN) field or a Subject Alternative Name field of the X.509 certificate, which allows man-in-the-middle attackers to spoof IRC servers via an arbitrary certificate.
- MDVSA-2010:079: irssi
- OSVDB ID: 63888: irssi X.509 Certificate Common Name (CN) Field Handling SSL MiTM Weakness
- SA39365: irssi Denial of Service and SSL Hostname Verification Vulnerabilities
- SUSE-SR:2010:011: SUSE Security Summary Report
- USN-929-1: irssi vulnerabilities
- USN-929-2: irssi regression
- VUPEN/ADV-2010-0856: Irssi SSL Hostname Validation and Denial of Service Vulnerabilities
- VUPEN/ADV-2010-0987: Slackware Security Update Fixes Irssi Security Bypass and DoS Issues
- VUPEN/ADV-2010-1107: SuSE Security Update Fixes Code Execution and Security Bypass
- VUPEN/ADV-2010-1110: Fedora Security Update Fixes Irssi Security Bypass and DoS Issues
Platforms Affected:
- Canonical Ubuntu 8.04 LTS
- Canonical Ubuntu 8.10
- irssi irssi 0.8.13
- Mandriva Linux 2009.1
- Mandriva Linux 2009.1 X86_64
- Mandriva Linux 2010 X86_64
- Mandriva Linux 2010
Reported:
Apr 11, 2010
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.