CVE-2020-35504

NameCVE-2020-35504
DescriptionA NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
SourceCVE (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 severitylow
Debian Bugs979679

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)stretch1:2.8+dfsg-6+deb9u9vulnerable
stretch (security)1:2.8+dfsg-6+deb9u16vulnerable
buster, buster (security)1:3.1+dfsg-8+deb10u8vulnerable
bullseye1:5.2+dfsg-11vulnerable
bookworm, sid1:6.1+dfsg-5fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusourceexperimental1:6.0+dfsg-1~exp0
qemusource(unstable)1:6.0+dfsg-3979679

Notes

[bullseye] - qemu <postponed> (Minor issue, revisit when fixed upstream)
[buster] - qemu <postponed> (Fix along in future DSA)
[stretch] - qemu <postponed> (Fix along in future DLA)
https://bugzilla.redhat.com/show_bug.cgi?id=1909766
https://bugs.launchpad.net/qemu/+bug/1910723 (reproducer)
https://lists.gnu.org/archive/html/qemu-devel/2020-12/msg06065.html
https://git.qemu.org/?p=qemu.git;a=commit;h=0db895361b8a82e1114372ff9f48
https://git.qemu.org/?p=qemu.git;a=commit;h=e392255766071c8cac480da3a9ae
https://git.qemu.org/?p=qemu.git;a=commit;h=e5455b8c1c6170c788f3c0fd577c
https://git.qemu.org/?p=qemu.git;a=commit;h=c5fef9112b15c4b5494791cdf8bb
https://git.qemu.org/?p=qemu.git;a=commit;h=7b320a8e67a534925048cbabfa51
https://git.qemu.org/?p=qemu.git;a=commit;h=99545751734035b76bd372c4e721
https://git.qemu.org/?p=qemu.git;a=commit;h=fa7505c154d4d00ad89a747be2ed
https://git.qemu.org/?p=qemu.git;a=commit;h=fbc6510e3379fa8f8370bf71198f
https://git.qemu.org/?p=qemu.git;a=commit;h=0ebb5fd80589835153a0c2baa1b8
https://git.qemu.org/?p=qemu.git;a=commit;h=324c8809897c8c53ad05c3a7147d
https://git.qemu.org/?p=qemu.git;a=commit;h=607206948cacda4a80be5b976dba

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