Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 2.8.1.1 |
Related Weaknesses (CWE)
References
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1122Issue TrackingThird Party Advisory
- https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14Issue TrackingPatchThird Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1122Issue TrackingThird Party Advisory
- https://github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14Issue TrackingPatchThird Party Advisory
FAQ
What is CVE-2017-8284?
CVE-2017-8284 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 priv...
How severe is CVE-2017-8284?
CVE-2017-8284 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-8284?
Check the references section above for vendor advisories and patch information. Affected products include: Qemu Qemu.