USN-4471-1: Net-SNMP vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM
• Ubuntu 12.04

Packages

• net-snmp - SNMP (Simple Network Management Protocol) server and applications

Details

Tobias Neitzel discovered that Net-SNMP incorrectly handled certain symlinks.
An attacker could possibly use this issue to access sensitive information.
(CVE-2020-15861)

It was discovered that Net-SNMP incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code.
This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 LTS, Ubuntu
18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2020-15862)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

• libsnmp-base - 5.8+dfsg-2ubuntu2.3
• libsnmp-perl - 5.8+dfsg-2ubuntu2.3
• libsnmp35 - 5.8+dfsg-2ubuntu2.3
• snmpd - 5.8+dfsg-2ubuntu2.3

Ubuntu 18.04

• libsnmp-base - 5.7.3+dfsg-1.8ubuntu3.5
• libsnmp-perl - 5.7.3+dfsg-1.8ubuntu3.5
• libsnmp30 - 5.7.3+dfsg-1.8ubuntu3.5
• snmpd - 5.7.3+dfsg-1.8ubuntu3.5

Ubuntu 16.04

• libsnmp-base - 5.7.3+dfsg-1ubuntu4.5
• libsnmp-perl - 5.7.3+dfsg-1ubuntu4.5
• libsnmp30 - 5.7.3+dfsg-1ubuntu4.5
• snmpd - 5.7.3+dfsg-1ubuntu4.5

Ubuntu 14.04

• libsnmp-base - 5.7.2~dfsg-8.1ubuntu3.3+esm1
• libsnmp-perl - 5.7.2~dfsg-8.1ubuntu3.3+esm1
• libsnmp30 - 5.7.2~dfsg-8.1ubuntu3.3+esm1
• snmpd - 5.7.2~dfsg-8.1ubuntu3.3+esm1

Ubuntu 12.04

• libsnmp-base - 5.4.3~dfsg-2.4ubuntu1.5
• libsnmp-perl - 5.4.3~dfsg-2.4ubuntu1.5
• libsnmp15 - 5.4.3~dfsg-2.4ubuntu1.5
• snmpd - 5.4.3~dfsg-2.4ubuntu1.5

After a standard system update you need to restart snmpd to make
all the necessary changes.

References

• CVE-2020-15861
• CVE-2020-15862