Dovecot message parsing denial of service
| dovecot-message-parsing-dos (46227) |  Low Risk |
Description:
Dovecot is vulnerable to a denial of service, caused by an error in the message parsing feature when used with the FETCH ENVELOPE command. By sending an email containing a specially-crafted From address, a remote attacker could exploit this vulnerability to cause an assertion error which blocks the victim's access to the mailbox.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Dovecot (1.1.6 or later), available from the Dovecot Download Web site. See References.
References:
- Dovecot Download Web site: Download.
- Dovecot-news Mailing List, Thu Oct 30 00:25:29 EET 2008: v1.1.6 released.
- BID-31997: Dovecot Invalid Message Address Parsing Denial of Service Vulnerability
- CVE-2008-4907: The message parsing feature in Dovecot 1.1.4 and 1.1.5, when using the FETCH ENVELOPE command in the IMAP client, allows remote attackers to cause a denial of service (persistent crash) via an email with a malformed From address, which triggers an assertion error, aka invalid message address parsing bug.
- GLSA-200812-16: Dovecot: Multiple vulnerabilities
- SA32479: Dovecot Malformed Header Denial of Service Vulnerability
- USN-666-1: Dovecot vulnerability
Platforms Affected:
- Canonical Ubuntu 8.10
- Dovecot Dovecot 1.1.4
- Dovecot Dovecot 1.1.5
- Gentoo Linux
Reported:
Oct 30, 2008
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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.