- Vulnerability/
- USN-4256-1
USN-4256-1: Cyrus SASL vulnerability
First published: Tue Jan 28 2020(Updated: )
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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/libsasl2-2 | <2.1.27+dfsg-1ubuntu0.1 | 2.1.27+dfsg-1ubuntu0.1 |
| Ubuntu Linux | =19.10 | |
| All of | ||
| ubuntu/libsasl2-2 | <2.1.27~101-g0780600+dfsg-3ubuntu2.1 | 2.1.27~101-g0780600+dfsg-3ubuntu2.1 |
| Ubuntu Linux | =18.04 | |
| All of | ||
| ubuntu/libsasl2-2 | <2.1.26.dfsg1-14ubuntu0.2 | 2.1.26.dfsg1-14ubuntu0.2 |
| Ubuntu Linux | =16.04 | |
| All of | ||
| ubuntu/libsasl2-2 | <2.1.25.dfsg1-17ubuntu0.1~esm1 | 2.1.25.dfsg1-17ubuntu0.1~esm1 |
| Ubuntu Linux | =14.04 | |
| All of | ||
| ubuntu/libsasl2-2 | <2.1.25.dfsg1-3ubuntu0.2 | 2.1.25.dfsg1-3ubuntu0.2 |
| Ubuntu Linux | =12.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2019-19906
- 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
- https://launchpad.net/ubuntu/+source/cyrus-sasl2/2.1.25.dfsg1-3ubuntu0.2
- https://ubuntu.com/security/notices/USN-4256-1 (Advisory)
Frequently Asked Questions
What is the severity of USN-4256-1?
The vulnerability USN-4256-1 has a high severity as it allows for potential arbitrary code execution or denial of service.
How do I fix USN-4256-1?
To fix USN-4256-1, upgrade the libsasl2-2 package to the recommended versions listed in the advisory.
Which Ubuntu versions are affected by USN-4256-1?
USN-4256-1 affects Ubuntu 19.10, 18.04, 16.04, 14.04, and 12.04.
What components are impacted by USN-4256-1?
The USN-4256-1 vulnerability specifically affects the Cyrus SASL implementation found in the libsasl2-2 package.
Can USN-4256-1 be exploited remotely?
Yes, an attacker could exploit the USN-4256-1 vulnerability remotely through crafted LDAP packets.
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