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Ubuntu 20.04: USN-4471-1 Critical: Net-SNMP Access Issues

ubuntu
Calendar Grey August 24, 2020
Dist Ubuntu Esm H88
Several vulnerabilities in Net-SNMP patched by Ubuntu, posing threats to data integrity and potential code execution.
Several security issues were fixed in Net-SNMP.

Summary

Several security issues were fixed in Net-SNMP.

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory code execution access issue net-snmp ubuntu 16.04 ubuntu 20.04 ubuntu 18.04

Update Instructions

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

Ubuntu 20.04 LTS:
  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 LTS:
  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 LTS:
  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 ESM:
  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 ESM:
  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

https://ubuntu.com/security/notices/USN-4471-1

CVE-2020-15861, CVE-2020-15862

Severity
critical
Lowest
Low
Medium
High
Critical

August 24, 2020

Topics%20covered

Topics Covered

security advisory code execution access issue net-snmp ubuntu 16.04 ubuntu 20.04 ubuntu 18.04

Package Information

https://launchpad.net/ubuntu/+source/net-snmp/5.8+dfsg-2ubuntu2.3
https://launchpad.net/ubuntu/+source/net-snmp/5.7.3+dfsg-1.8ubuntu3.5
https://launchpad.net/ubuntu/+source/net-snmp/5.7.3+dfsg-1ubuntu4.5

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