CVE-2019-20919

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-09-17 · updated 2026-06-17
Weakness: CWE-476

Description

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.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04
Debian Linux: 9.0
Fedoraproject Fedora: 31
openSUSE Leap: 15.1, 15.2
HMBRAND DBI: before 1.643 — fixed in 1.643

How to fix

Upgrade to a fixed version: HMBRAND DBI 1.643. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00013.html
https://github.com/perl5-dbi/dbi/commit/eca7d7c8f43d96f6277e86d1000e842eb4cc67ff
https://lists.debian.org/debian-lts-announce/2020/09/msg00026.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXLKODJ7B57GITDEZZXNSHPK4VBYXYHR/
https://metacpan.org/pod/distribution/DBI/Changes#Changes-in-DBI-1.643-...
https://usn.ubuntu.com/4534-1/
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00012.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00013.html
https://github.com/perl5-dbi/dbi/commit/eca7d7c8f43d96f6277e86d1000e842eb4cc67ff
https://lists.debian.org/debian-lts-announce/2020/09/msg00026.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JXLKODJ7B57GITDEZZXNSHPK4VBYXYHR/

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