Advisory Published

USN-3625-1: Perl vulnerabilities

First published: Mon Apr 16 2018(Updated: )

It was discovered that Perl incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause Perl to hang, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS. (CVE-2015-8853) It was discovered that Perl incorrectly loaded libraries from the current working directory. A local attacker could possibly use this issue to execute arbitrary code. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-6185) It was discovered that Perl incorrectly handled the rmtree and remove_tree functions. A local attacker could possibly use this issue to set the mode on arbitrary files. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2017-6512) Brian Carpenter discovered that Perl incorrectly handled certain regular expressions. An attacker could use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue has only been addressed in Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2018-6797) Nguyen Duc Manh discovered that Perl incorrectly handled certain regular expressions. An attacker could use this issue to cause Perl to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.10. (CVE-2018-6798) GwanYeong Kim discovered that Perl incorrectly handled certain data when using the pack function. An attacker could use this issue to cause Perl to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2018-6913)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/perl<5.26.0-8ubuntu1.1
5.26.0-8ubuntu1.1
Ubuntu OpenSSH Client=17.10
All of
ubuntu/perl<5.22.1-9ubuntu0.3
5.22.1-9ubuntu0.3
Ubuntu OpenSSH Client=16.04
All of
ubuntu/perl<5.18.2-2ubuntu1.4
5.18.2-2ubuntu1.4
Ubuntu OpenSSH Client=14.04

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Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID of this advisory?

    The vulnerability ID of this advisory is USN-3625-1.

  • What is the severity of USN-3625-1?

    The severity of USN-3625-1 is not specified in the information provided.

  • What software versions are affected by USN-3625-1?

    USN-3625-1 affects Perl versions 5.26.0-8ubuntu1.1, 5.22.1-9ubuntu0.3, and 5.18.2-2ubuntu1.4.

  • How can an attacker exploit USN-3625-1?

    This vulnerability can be exploited by an attacker to cause Perl to hang, resulting in a denial of service.

  • How can I fix USN-3625-1?

    To fix USN-3625-1, update to Perl version 5.26.0-8ubuntu1.1 if you are using Ubuntu 17.10, version 5.22.1-9ubuntu0.3 if you are using Ubuntu 16.04, or version 5.18.2-2ubuntu1.4 if you are using Ubuntu 14.04.

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