CVE-2019-13117 Uninitialized read in Nokogiri gem

What is CVE-2019-13117?

CVE-2019-13117 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 1 Jul 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In numbers.c in libxslt 1.1.33, an xsl:number with certain format strings could lead to a uninitialized read in xsltNumberFormatInsertNumbers. This could allow an attacker to discern whether a byte on the stack contains the characters A, a, I, i, or 0, or any other character.

Weakness: CWE-908

Which versions are affected by CVE-2019-13117?

2 open source packages ship an affected version, including nokogiri. It affects 6 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Oracle Openjdk, Xmlsoft Libxslt.

How do I fix CVE-2019-13117?

Upgrade nokogiri to 1.10.5 or later.

Is CVE-2019-13117 being exploited?

There is no known exploitation of CVE-2019-13117 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2019-13117, DEBIAN-CVE-2019-13117, GHSA-4hm9-844j-jmxp, JLSEC-2026-578, UBUNTU-CVE-2019-13117.