CVE-2018-20191

NameCVE-2018-20191
Descriptionhw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).
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 severitymedium (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie1:2.1+dfsg-12+deb8u6fixed
jessie (security)1:2.1+dfsg-12+deb8u11fixed
stretch1:2.8+dfsg-6+deb9u5fixed
stretch (security)1:2.8+dfsg-6+deb9u7fixed
buster1:3.1+dfsg-8~deb10u1vulnerable
sid1:3.1+dfsg-8vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusource(unstable)(unfixed)unimportant
qemusourcejessie(not affected)
qemusourcestretch(not affected)
qemu-kvmsource(unstable)(unfixed)medium

Notes

[stretch] - qemu <not-affected> (Vulnerable code not present)
[jessie] - qemu <not-affected> (Vulnerable code not present)
https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg03066.html
PVRDMA support not enabled in the binary packages until 1:3.1+dfsg-3, disabled again in 1:3.1+dfsg-4

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