CVE-2020-12829

Name	CVE-2020-12829
Description	In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write() callback. A local attacker could abuse this flaw to crash the QEMU process in sm501_2d_operation() in hw/display/sm501.c on the host, resulting in a denial of service.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DSA-4760-1
Debian Bugs	961451

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
qemu (PTS)	buster	1:3.1+dfsg-8+deb10u8	fixed
	buster (security)	1:3.1+dfsg-8+deb10u10	fixed
	bullseye (security), bullseye	1:5.2+dfsg-11+deb11u2	fixed
	bookworm, sid	1:7.2+dfsg-7	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
qemu	source	stretch	(not affected)
qemu	source	buster	1:3.1+dfsg-8+deb10u8		DSA-4760-1
qemu	source	(unstable)	1:5.0-12	low		961451

Notes

[stretch] - qemu <not-affected> (SM501 only compiled for misc/sh4 where it's not enabled as a graphics device yet; intrusive)
https://bugzilla.redhat.com/show_bug.cgi?id=1808510
https://bugzilla.redhat.com/show_bug.cgi?id=1786026
https://git.qemu.org/?p=qemu.git;a=commit;h=b15a22bbcbe6a78dc3d88fe3134985e4cdd87de4