Vulnerability Monitor

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CVE-2017-8284

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.

Published

2017-04-26T14:59:00.270

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.0: 7.0 (HIGH)

CVSSv2 Vector

AV:L/AC:M/Au:N/C:C/I:C/A:C

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

10.0

Weaknesses

Type: Primary
CWE-94

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	qemu	qemu	≤ 2.8.1.1	Yes

References

https://bugs.chromium.org/p/project-zero/issues/detail?id=1122 Issue Tracking, Third Party Advisory ([email protected])
https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://bugs.chromium.org/p/project-zero/issues/detail?id=1122 Issue Tracking, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)