CVE-2016-7907

NameCVE-2016-7907
DescriptionThe imx_fec_do_tx function in hw/net/imx_fec.c in QEMU (aka Quick Emulator) does not properly limit the buffer descriptor count when transmitting packets, which allows local guest OS administrators to cause a denial of service (infinite loop and QEMU process crash) via vectors involving a buffer descriptor with a length of 0 and crafted values in bd.flags.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs839986

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
qemu (PTS)jessie, jessie (lts)1:2.1+dfsg-12+deb8u23fixed
stretch (security)1:2.8+dfsg-6+deb9u17fixed
stretch (lts), stretch1:2.8+dfsg-6+deb9u19fixed
buster1:3.1+dfsg-8+deb10u8fixed
buster (security)1:3.1+dfsg-8+deb10u12fixed
bullseye1:5.2+dfsg-11+deb11u3fixed
bullseye (security)1:5.2+dfsg-11+deb11u2fixed
bookworm1:7.2+dfsg-7+deb12u6fixed
trixie1:8.2.4+ds-1fixed
sid1:9.0.2+ds-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
qemusourcewheezy(not affected)
qemusourcejessie(not affected)
qemusource(unstable)1:2.8+dfsg-3839986
qemu-kvmsource(unstable)(not affected)

Notes

[jessie] - qemu <not-affected> (Vulnerable code introduced after v2.5.0-rc0)
[wheezy] - qemu <not-affected> (Vulnerable code introduced after v2.5.0-rc0)
- qemu-kvm <not-affected> (Vulnerable code introduced after v2.5.0-rc0)
https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg05556.html
i.MX Fast Ethernet Controller emulation introduced in v2.5.0-rc0 with
http://git.qemu.org/?p=qemu.git;a=commit;h=fcbd8018e645f3ab1ef9af94dc88a0d3272926d3 (v2.5.0-rc0)

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