SB2020070606 - Remote code execution in net-snmp
Published: July 6, 2020
Security Bulletin ID
SB2020070606
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Double Free (CVE-ID: CVE-2019-20892)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing an SNMPv3 GetBulk request in usm_free_usmStateReference in snmplib/snmpusm.c in net-snmp. A remote attacker can pass specially crafted data to the application, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.
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://sourceforge.net/p/net-snmp/bugs/2923/