CVE-2017-8284

Publication date 26 April 2017

Last updated 4 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.0 · High

Score breakdown

Description

The disas_insn function in target/i386/translate.c in QEMU before 2.9.0, when TCG mode without hardware acceleration is used, does not limit the instruction size, which allows local users to gain privileges by creating a modified basic block that injects code into a setuid program, as demonstrated by procmail. NOTE: the vendor has stated "this bug does not violate any security guarantees QEMU makes.

Read the notes from the security team

Status

Package Ubuntu Release Status
qemu-kvm 17.04 zesty Not in release
16.10 yakkety Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
12.04 LTS precise Ignored
qemu 17.04 zesty Ignored
16.10 yakkety Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Ignored
12.04 LTS precise Not in release

Notes

mdeslaur

upstream disputed this has a security impact. Ignoring.

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 7.0 · High
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Other references