CVE-2021-20255

NameCVE-2021-20255
DescriptionA stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or 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)
ReferencesDLA-2623-1
NVD severitylow
Debian Bugs984451

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+deb9u14fixed
buster, buster (security)1:3.1+dfsg-8+deb10u8vulnerable
bullseye, sid1:5.2+dfsg-10vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusourcestretch1:2.8+dfsg-6+deb9u14DLA-2623-1
qemusource(unstable)(unfixed)984451

Notes

[bullseye] - qemu <postponed> (Minor issue)
[buster] - qemu <postponed> (Minor issue)
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg06098.html
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Feepro100_stackoverflow1

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