medium
4.7
CWE
476
Advisory Published
CVE Published
Updated

CVE-2019-20919: Null Pointer Dereference

First published: Thu Sep 17 2020(Updated: )

An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for NULL and the code does that. But, shortly thereafter, it calls SvOK(profile), causing a NULL pointer dereference.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Perl Dbi<1.643
Fedoraproject Fedora=31
Canonical Ubuntu Linux=12.04
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Debian Debian Linux=9.0
openSUSE Leap=15.1
openSUSE Leap=15.2
ubuntu/libdbi-perl<1.640-1ubuntu0.2
1.640-1ubuntu0.2
ubuntu/libdbi-perl<1.630-1ubuntu0.1~
1.630-1ubuntu0.1~
ubuntu/libdbi-perl<1.643-1
1.643-1
ubuntu/libdbi-perl<1.634-1ubuntu0.2
1.634-1ubuntu0.2
debian/libdbi-perl
1.643-3
1.643-4

Remedy

https://github.com/perl5-dbi/dbi/commit/eca7d7c8f43d96f6277e86d1000e842eb4cc67ff

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2019-20919?

    CVE-2019-20919 is a vulnerability in the Perl DBI module that can cause a NULL pointer dereference.

  • How severe is CVE-2019-20919?

    CVE-2019-20919 has a severity level of 4.7, which is considered medium.

  • Which software is affected by CVE-2019-20919?

    The following software packages are affected by CVE-2019-20919: libdbi-perl (versions 1.642-1+deb10u2, 1.643-3, 1.643-4) on Debian, libdbi-perl (version 1.640-1ubuntu0.2) on Ubuntu (bionic), libdbi-perl (version 1.630-1ubuntu0.1~) on Ubuntu (trusty), libdbi-perl (version 1.643-1) on Ubuntu (upstream), libdbi-perl (version 1.634-1ubuntu0.2) on Ubuntu (xenial), Perl DBI (version up to 1.643), Fedora (version 31), Canonical Ubuntu Linux (versions 12.04, 14.04, 16.04, 18.04), Debian Linux (version 9.0), and openSUSE Leap (versions 15.1, 15.2).

  • How can I fix CVE-2019-20919?

    To fix CVE-2019-20919, you should update to the patched versions of the affected software packages. Refer to the documentation provided by the relevant sources.

  • Where can I find more information about CVE-2019-20919?

    You can find more information about CVE-2019-20919 at the following references: [GitHub](https://github.com/perl5-dbi/dbi/commit/eca7d7c8f43d96f6277e86d1000e842eb4cc67ff), [MetaCPAN](https://metacpan.org/pod/distribution/DBI/Changes#Changes-in-DBI-1.643-), [Fedora package announce](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JXLKODJ7B57GITDEZZXNSHPK4VBYXYHR/).

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