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Ubuntu 19.10: USN-4256-1 Critical: cyrus-sasl2 Denial of Service

ubuntu
Calendar Grey January 28, 2020
Dist Ubuntu Esm H88
The vulnerability in Cyrus SASL could enable system crashes or arbitrary code execution due to specially designed LDAP packets. It is advised to apply the latest updates.
Cyrus SASL could be made to crash or execute arbitrary code if it received a specially crafted LDAP packet.

Summary

Cyrus SASL could be made to crash or execute arbitrary code if it received

a specially crafted LDAP packet.

Software Description:

- cyrus-sasl2: Cyrus Simple Authentication and Security Layer

Details:

It was discovered that Cyrus SASL incorrectly handled certain LDAP packets.

An attacker could possibly use this issue to execute arbitrary code or cause

a denial of service.

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code ubuntu cyrus sasl

Update Instructions

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

Ubuntu 19.10:
  libsasl2-2                      2.1.27+dfsg-1ubuntu0.1

Ubuntu 18.04 LTS:
  libsasl2-2                      2.1.27~101-g0780600+dfsg-3ubuntu2.1

Ubuntu 16.04 LTS:
  libsasl2-2                      2.1.26.dfsg1-14ubuntu0.2

Ubuntu 14.04 ESM:
  libsasl2-2                      2.1.25.dfsg1-17ubuntu0.1~esm1

Ubuntu 12.04 ESM:
  libsasl2-2                      2.1.25.dfsg1-3ubuntu0.2

After a standard system update you need to restart services using
SASL to effect the necessary changes.

References

https://ubuntu.com/security/notices/USN-4256-1

CVE-2019-19906

Severity
critical
Lowest
Low
Medium
High
Critical

January 28, 2020

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code ubuntu cyrus sasl

Package Information

https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.27+dfsg-1ubuntu0.1
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.27~101-g0780600+dfsg-3ubuntu2.1
https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.26.dfsg1-14ubuntu0.2

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