RCE in Qemu
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- bugs.chromium.org/p/project-zero/issues/detail (Third Party Advisory, Issue Tracking)
- github.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14 (Patch, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2017-8284?
- CVE-2017-8284 is a high-severity vulnerability in Qemu, classified under Code Injection. CVSS score: 7.0/10. Published 2017-04-26.
- How severe is CVE-2017-8284?
- High severity. CVSS v3 base score is 7.0 out of 10.