net-snmp before 5.8.1.pre1 has a double free in usm_free_usmStateReference in snmplib/snmpusm.c via an SNMPv3 GetBulk request. NOTE: this affects net-snmp packages shipped to end users by multiple Linux distributions, but might not affect an upstream release.
Weakness
The product calls free() twice on the same memory address.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Net-snmp | Net-snmp | * | 5.8 (including) |
| Red Hat Enterprise Linux 8 | RedHat | net-snmp-1:5.8-12.el8_1.1 | * |
| Red Hat Enterprise Linux 8 | RedHat | net-snmp-1:5.8-12.el8_1.1 | * |
| Net-snmp | Ubuntu | devel | * |
| Net-snmp | Ubuntu | esm-infra/focal | * |
| Net-snmp | Ubuntu | focal | * |
| Net-snmp | Ubuntu | trusty | * |
Potential Mitigations
References
- http://www.openwall.com/lists/oss-security/2020/06/25/4
- https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027
- https://bugzilla.redhat.com/show_bug.cgi?id=1663027
- https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9
- https://security.gentoo.org/glsa/202008-12
- https://sourceforge.net/p/net-snmp/bugs/2923/
- https://usn.ubuntu.com/4410-1/
- https://www.oracle.com/security-alerts/cpujan2021.html
- http://www.openwall.com/lists/oss-security/2020/06/25/4
- https://bugs.launchpad.net/ubuntu/+source/net-snmp/+bug/1877027
- https://bugzilla.redhat.com/show_bug.cgi?id=1663027
- https://github.com/net-snmp/net-snmp/commit/5f881d3bf24599b90d67a45cae7a3eb099cd71c9
- https://security.gentoo.org/glsa/202008-12
- https://sourceforge.net/p/net-snmp/bugs/2923/
- https://usn.ubuntu.com/4410-1/
- https://www.oracle.com/security-alerts/cpujan2021.html