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CVE-2018-12617

Publication date 21 June 2018

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

Status

Package Ubuntu Release Status
qemu 21.04 hirsute
Fixed 1:2.12+dfsg-3ubuntu9
20.10 groovy
Fixed 1:2.12+dfsg-3ubuntu9
20.04 LTS focal
Fixed 1:2.12+dfsg-3ubuntu9
19.10 eoan
Fixed 1:2.12+dfsg-3ubuntu9
19.04 disco
Fixed 1:2.12+dfsg-3ubuntu9
18.10 cosmic
Fixed 1:2.12+dfsg-3ubuntu8.1
18.04 LTS bionic
Fixed 1:2.11+dfsg-1ubuntu7.8
17.10 artful Ignored
16.04 LTS xenial
Fixed 1:2.5+dfsg-5ubuntu10.33
14.04 LTS trusty
Fixed 2.0.0+dfsg-2ubuntu1.44
qemu-kvm 21.04 hirsute Not in release
20.10 groovy Not in release
20.04 LTS focal Not in release
19.10 eoan Not in release
19.04 disco Not in release
18.10 cosmic Not in release
18.04 LTS bionic Not in release
17.10 artful Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
qemu

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H