Bug 699035 (CVE-2011-1720)
| Summary: | CVE-2011-1720 postfix (smtpd): Crash due to improper management of SASL handlers for SMTP sessions | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Jan Lieskovsky <jlieskov> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | hfuchi, jskarvad, security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-06-20 15:31:33 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 704133, 704134, 704135, 704136, 704137, 833972 | ||
| Bug Blocks: | |||
This issue affects the versions of the postfix package, as shipped with Red Hat Enterprise Linux 4, 5, and 6. -- This issue affects the versions of the postfix package, as shipped with Fedora release of 13 and 14. Public now via: http://thread.gmane.org/gmane.mail.postfix.announce/127 http://www.postfix.org/CVE-2011-1720.html (to be available soon) Acknowledgements: Red Hat would like to thank the CERT/CC for reporting CVE-2011-1720. Upstream acknowledges Thomas Jarosch of Intra2net AG as the original reporter. This issue has been addressed in following products: Red Hat Enterprise Linux 4 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2011:0843 https://rhn.redhat.com/errata/RHSA-2011-0843.html |
A heap-based buffer overread flaw was found in the way Postfix mail transport agent performed SASL handlers management for SMTP sessions, when the Cyrus SASL authentication was enabled. A remote attacker could use this flaw to cause Postfix smtpd server crash via specially-crafted SASL authentication request. Note: The default configuration of Postfix mail transport agent, as shipped with Red Hat Enterprise Linux 4, 5, and 6 do not enable SASL support for SMTP authentication for mail clients (thus Postfix server instances using it are not vulnerable to this flaw). Workaround: If your Postfix server configuration contains directive like: smtpd_sasl_auth_enable = yes change 'yes' to 'no' or comment the whole line out not to be vulnerable to this flaw.