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CVE details

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.

Score
7.0 high
Published
2017-04-26
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
emulators/qemu-cheriqemu-cheri0.d20260108unaddressedbrooks@FreeBSD.org

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>qemu-cheri</name>
	<range><lt>FIXME</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>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.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2017-8284</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2017-8284</url>
    </references>
    <dates>
      <discovery>2017-04-26</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>