Advisory Published

USN-3183-1: GnuTLS vulnerabilities

First published: Wed Feb 01 2017(Updated: )

Stefan Buehler discovered that GnuTLS incorrectly verified the serial length of OCSP responses. A remote attacker could possibly use this issue to bypass certain certificate validation measures. This issue only applied to Ubuntu 16.04 LTS. (CVE-2016-7444) Shi Lei discovered that GnuTLS incorrectly handled certain warning alerts. A remote attacker could possibly use this issue to cause GnuTLS to hang, resulting in a denial of service. This issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-8610) It was discovered that GnuTLS incorrectly decoded X.509 certificates with a Proxy Certificate Information extension. 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 16.04 LTS and Ubuntu 16.10. (CVE-2017-5334) It was discovered that GnuTLS incorrectly handled certain OpenPGP certificates. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2017-5335, CVE-2017-5336, CVE-2017-5337)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/libgnutls30<3.5.3-5ubuntu1.1
3.5.3-5ubuntu1.1
Ubuntu gir1.2-packagekitglib-1.0=16.10
All of
ubuntu/libgnutls30<3.4.10-4ubuntu1.2
3.4.10-4ubuntu1.2
Ubuntu gir1.2-packagekitglib-1.0=16.04
All of
ubuntu/libgnutls26<2.12.23-12ubuntu2.6
2.12.23-12ubuntu2.6
Ubuntu gir1.2-packagekitglib-1.0=14.04
All of
ubuntu/libgnutls26<2.12.14-5ubuntu3.13
2.12.14-5ubuntu3.13
Ubuntu gir1.2-packagekitglib-1.0=12.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-3183-1?

    The severity of USN-3183-1 is categorized as critical due to potential bypass of certificate validation.

  • How do I fix USN-3183-1?

    To fix USN-3183-1, upgrade to the patched version of GnuTLS as specified in the advisory for your Ubuntu version.

  • Which Ubuntu versions are affected by USN-3183-1?

    USN-3183-1 affects Ubuntu versions 16.04 LTS, 16.10, 14.04 LTS, and 12.04 LTS with specific GnuTLS package versions.

  • What is the impact of not addressing USN-3183-1?

    Failing to address USN-3183-1 can result in a remote attacker bypassing certificate validation, leading to security breaches.

  • Who discovered the vulnerability detailed in USN-3183-1?

    The vulnerability in USN-3183-1 was discovered by researcher Stefan Buehler.

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