Arbitrary Code Injection Affecting qemu package, versions <1:2.10.0-1


low

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High
    Availability High

    Threat Intelligence

    EPSS 0.04% (6th percentile)
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NVD
7 high
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Red Hat
4.8 medium

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  • Snyk ID SNYK-DEBIANUNSTABLE-QEMU-428312
  • published 26 Apr 2017
  • disclosed 26 Apr 2017

How to fix?

Upgrade Debian:unstable qemu to version 1:2.10.0-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.