- Vulnerability/
- USN-3999-1
USN-3999-1: GnuTLS vulnerabilities
First published: Thu May 30 2019(Updated: )
Eyal Ronen, Kenneth G. Paterson, and Adi Shamir discovered that GnuTLS was vulnerable to a timing side-channel attack known as the "Lucky Thirteen" issue. A remote attacker could possibly use this issue to perform plaintext-recovery attacks via analysis of timing data. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2018-10844, CVE-2018-10845, CVE-2018-10846) Tavis Ormandy discovered that GnuTLS incorrectly handled memory when verifying certain X.509 certificates. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS, Ubuntu 18.10, and Ubuntu 19.04. (CVE-2019-3829) It was discovered that GnuTLS incorrectly handled certain post-handshake messages. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.10 and Ubuntu 19.04. (CVE-2019-3836)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/libgnutls30 | <3.6.5-2ubuntu1.1 | 3.6.5-2ubuntu1.1 |
| =19.04 | ||
| All of | ||
| ubuntu/libgnutls30 | <3.6.4-2ubuntu1.2 | 3.6.4-2ubuntu1.2 |
| =18.10 | ||
| All of | ||
| ubuntu/libgnutls30 | <3.5.18-1ubuntu1.1 | 3.5.18-1ubuntu1.1 |
| =18.04 | ||
| All of | ||
| ubuntu/libgnutls30 | <3.4.10-4ubuntu1.5 | 3.4.10-4ubuntu1.5 |
| =16.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2018-10844
- https://ubuntu.com/security/CVE-2018-10845
- https://ubuntu.com/security/CVE-2018-10846
- https://ubuntu.com/security/CVE-2019-3829
- https://ubuntu.com/security/CVE-2019-3836
- https://launchpad.net/ubuntu/+source/gnutls28/3.6.5-2ubuntu1.1
- https://launchpad.net/ubuntu/+source/gnutls28/3.6.4-2ubuntu1.2
- https://launchpad.net/ubuntu/+source/gnutls28/3.5.18-1ubuntu1.1
- https://launchpad.net/ubuntu/+source/gnutls28/3.4.10-4ubuntu1.5
- https://ubuntu.com/security/notices/USN-3999-1 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
Frequently Asked Questions
What is the severity of USN-3999-1?
The severity of USN-3999-1 is high.
How does the GnuTLS vulnerability known as "Lucky Thirteen" work?
The "Lucky Thirteen" vulnerability in GnuTLS is a timing side-channel attack that could allow a remote attacker to perform plaintext-recovery attacks by analyzing timing data.
Which versions of Ubuntu are affected by USN-3999-1?
Ubuntu versions 19.04, 18.10, 18.04, and 16.04 are affected by USN-3999-1.
How can I fix the GnuTLS vulnerability in Ubuntu?
To fix the GnuTLS vulnerability, update the libgnutls30 package to version 3.6.5-2ubuntu1.1 for Ubuntu 19.04, 3.6.4-2ubuntu1.2 for Ubuntu 18.10, 3.5.18-1ubuntu1.1 for Ubuntu 18.04, and 3.4.10-4ubuntu1.5 for Ubuntu 16.04.
Where can I find more information about USN-3999-1?
You can find more information about USN-3999-1 at the following links: - [CVE-2018-10844](https://ubuntu.com/security/CVE-2018-10844) - [CVE-2018-10845](https://ubuntu.com/security/CVE-2018-10845) - [CVE-2018-10846](https://ubuntu.com/security/CVE-2018-10846)
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