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CVE-2017-7539

Published: 26 July 2018

An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.

Notes

AuthorNote
seth-arnold
Debian triage suggests it was introduced in v2.9.0-rc0

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
qemu
Launchpad, Ubuntu, Debian
trusty Not vulnerable

upstream Needed

xenial Not vulnerable

zesty Not vulnerable

Patches:
upstream: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b

qemu-kvm
Launchpad, Ubuntu, Debian
trusty Does not exist

upstream Needed

xenial Does not exist

zesty Does not exist

Patches:

upstream: http://git.qemu.org/?p=qemu.git;a=commitdiff;h=2b0bbc4f8809c972bad134bc1a2570dbb01dea0b

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H