Advisory Published

USN-3805-1: curl vulnerabilities

First published: Wed Oct 31 2018(Updated: )

Harry Sintonen discovered that curl incorrectly handled SASL authentication. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-16839) Brian Carpenter discovered that curl incorrectly handled memory when closing certain handles. A remote attacker could use this issue to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-16840) Brian Carpenter discovered that the curl command-line tool incorrectly handled error messages. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2018-16842)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/curl<7.61.0-1ubuntu2.2
7.61.0-1ubuntu2.2
=18.10
All of
ubuntu/libcurl3-gnutls<7.61.0-1ubuntu2.2
7.61.0-1ubuntu2.2
=18.10
All of
ubuntu/libcurl3-nss<7.61.0-1ubuntu2.2
7.61.0-1ubuntu2.2
=18.10
All of
ubuntu/libcurl4<7.61.0-1ubuntu2.2
7.61.0-1ubuntu2.2
=18.10
All of
ubuntu/curl<7.58.0-2ubuntu3.5
7.58.0-2ubuntu3.5
=18.04
All of
ubuntu/libcurl3-gnutls<7.58.0-2ubuntu3.5
7.58.0-2ubuntu3.5
=18.04
All of
ubuntu/libcurl3-nss<7.58.0-2ubuntu3.5
7.58.0-2ubuntu3.5
=18.04
All of
ubuntu/libcurl4<7.58.0-2ubuntu3.5
7.58.0-2ubuntu3.5
=18.04
All of
ubuntu/curl<7.47.0-1ubuntu2.11
7.47.0-1ubuntu2.11
=16.04
All of
ubuntu/libcurl3<7.47.0-1ubuntu2.11
7.47.0-1ubuntu2.11
=16.04
All of
ubuntu/libcurl3-gnutls<7.47.0-1ubuntu2.11
7.47.0-1ubuntu2.11
=16.04
All of
ubuntu/libcurl3-nss<7.47.0-1ubuntu2.11
7.47.0-1ubuntu2.11
=16.04
All of
ubuntu/curl<7.35.0-1ubuntu2.19
7.35.0-1ubuntu2.19
=14.04
All of
ubuntu/libcurl3<7.35.0-1ubuntu2.19
7.35.0-1ubuntu2.19
=14.04
All of
ubuntu/libcurl3-gnutls<7.35.0-1ubuntu2.19
7.35.0-1ubuntu2.19
=14.04
All of
ubuntu/libcurl3-nss<7.35.0-1ubuntu2.19
7.35.0-1ubuntu2.19
=14.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is USN-3805-1.

  • What is the severity of USN-3805-1?

    The severity of USN-3805-1 is not specified in the advisory.

  • What is the affected software for USN-3805-1?

    The affected software for USN-3805-1 includes curl and its related libraries (libcurl3-gnutls, libcurl3-nss, libcurl4) on Ubuntu 18.10, 18.04, 16.04, and 14.04.

  • How can this vulnerability be exploited?

    This vulnerability can be exploited by a remote attacker to cause curl to crash, resulting in a denial of service, or possibly execute arbitrary code.

  • How can I fix USN-3805-1?

    To fix USN-3805-1, update the affected curl packages to the specified remedy version for your Ubuntu version.

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