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CVE-2017-8284

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 p…

Published Apr 26, 2017CWE-94EPSS 0.43%

Overview

CVE-2017-8284 is a high-severity vulnerability. It was published on April 26, 2017 and has a CVSS 3.0 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbugs.chromium.org/p/project-zero/issues/detail?id=1122GitHubgithub.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14Refbugs.chromium.org/p/project-zero/issues/detail?id=1122GitHubgithub.com/qemu/qemu/commit/30663fd26c0307e414622c7a8607fbc04f92ec14

How CyberStrike helps

Frequently asked questions

What is CVE-2017-8284?

CVE-2017-8284 is a high-severity vulnerability. It was published on April 26, 2017 and has a CVSS 3.0 base score of 7.0 (HIGH).

How severe is CVE-2017-8284?

This vulnerability has a CVSS 3.0 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2017-8284?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-8284?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-8284 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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