CVE-2019-20919 — An issue was discovered in the DBI module before 1

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-09-17T17:35:43.000Z
• Last modified: 2024-08-05T03:00:18.776Z

09References

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