Bug 506903 (CVE-2009-1887)
| Summary: | CVE-2009-1887 net-snmp: DoS (division by zero) via SNMP GetBulk requests | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Tomas Hoger <thoger> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | jsafrane, security-response-team, vdanen |
| 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: | 2009-06-25 14:42:25 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: | 506444 | ||
| Bug Blocks: | |||
This issue has been addressed in following products: Red Hat Enterprise Linux 3 Via RHSA-2009:1124 https://rhn.redhat.com/errata/RHSA-2009-1124.html |
It was discovered that remote attacker can cause net-snmp's snmpd to crash via specially crafted SNMP GetBulk requests, that triggers division by zero in the following code: if (maxbulk <= 0 || maxbulk > maxresponses / r) maxbulk = maxresponses / r; This code has been added as part of the fix for CVE-2008-4309 (bug #469349). This problem never affected upstream net-snmp versions, thanks to following upstream commit from 2004: http://net-snmp.svn.sourceforge.net/viewvc/net-snmp/trunk/net-snmp/agent/snmp_agent.c?r1=9583&r2=9695 This upstream change is part of net-snmp packages shipped in Red Hat Enterprise Linux 4 and later. Therefore this division by zero DoS only affects net-snmp in Red Hat Enterprise Linux 3.