CVE-2019-19624

Name	CVE-2019-19624
Description	An out-of-bounds read was discovered in OpenCV before 4.1.1. Specifically, variable coarsest_scale is assumed to be greater than or equal to finest_scale within the calc()/ocl_calc() functions in dis_flow.cpp. However, this is not true when dealing with small images, leading to an out-of-bounds read of the heap-allocated arrays Ux and Uy.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	medium

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
opencv (PTS)	stretch	2.4.9.1+dfsg1-2	fixed
	buster	3.2.0+dfsg-6	vulnerable
	bullseye, sid	4.2.0+dfsg-6	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
opencv	source	jessie	(not affected)
opencv	source	stretch	(not affected)
opencv	source	(unstable)	4.1.2+dfsg-3

Notes

[buster] - opencv <no-dsa> (Minor issue; can be fixed via point release)
[stretch] - opencv <not-affected> (Vulnerable code introduced later)
[jessie] - opencv <not-affected> (Vulnerable code introduced later)
https://github.com/opencv/opencv/commit/d1615ba11a93062b1429fce9f0f638d1572d3418
https://github.com/opencv/opencv/issues/14554