==========================================================================
Ubuntu Security Notice USN-4471-2
September 01, 2020
net-snmp regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
– Ubuntu 14.04 ESM
Summary:
USN-4471-1 introduced a regression in Net-SNMP.
Software Description:
– net-snmp: SNMP (Simple Network Management Protocol) server and applications
Details:
USN-4471-1 fixed a vulnerability in Net-SNMP. The updated introduced a regression making
nsExtendCacheTime not settable. This update fixes the problem adding the cacheTime feature flag.
Original advisory 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 18.04 LTS:
libsnmp-base 5.7.3+dfsg-1.8ubuntu3.6
libsnmp-perl 5.7.3+dfsg-1.8ubuntu3.6
libsnmp30 5.7.3+dfsg-1.8ubuntu3.6
snmpd 5.7.3+dfsg-1.8ubuntu3.6
Ubuntu 16.04 LTS:
libsnmp-base 5.7.3+dfsg-1ubuntu4.6
libsnmp-perl 5.7.3+dfsg-1ubuntu4.6
libsnmp30 5.7.3+dfsg-1ubuntu4.6
snmpd 5.7.3+dfsg-1ubuntu4.6
Ubuntu 14.04 ESM:
libsnmp-base 5.7.2~dfsg-8.1ubuntu3.3+esm2
libsnmp-perl 5.7.2~dfsg-8.1ubuntu3.3+esm2
libsnmp30 5.7.2~dfsg-8.1ubuntu3.3+esm2
snmpd 5.7.2~dfsg-8.1ubuntu3.3+esm2
After a standard system update you need to restart snmpd to make
all the necessary changes.
References:
https://usn.ubuntu.com/4471-2
https://usn.ubuntu.com/4471-1
https://launchpad.net/bugs/1892980
Package Information:
https://launchpad.net/ubuntu/+source/net-snmp/5.7.3+dfsg-1.8ubuntu3.6
https://launchpad.net/ubuntu/+source/net-snmp/5.7.3+dfsg-1ubuntu4.6
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