Improper access control in QEMU - CVE-2015-8550

Vulnerability details

The vulnerability allows a local privileged user to execute arbitrary code.

Xen, when used on a system providing PV backends, allows local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability.

Affected software

How to mitigate CVE-2015-8550

Links to Public Exploits and PoC-codes

• Exploit #5166 - kernel-exploit-factory (Linux kernel CVE exploit analysis report and relative debug environment. You don't need to compile Linux kernel and configure your environment anymore. ) (February 23, 2021)

External References

• http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html
• http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00005.html
• http://www.debian.org/security/2016/dsa-3434
• http://www.debian.org/security/2016/dsa-3471
• http://www.debian.org/security/2016/dsa-3519
• http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
• http://www.securityfocus.com/bid/79592
• http://www.securitytracker.com/id/1034479
• http://xenbits.xen.org/xsa/advisory-155.html
• https://security.gentoo.org/glsa/201604-03

Related Security Bulletins

• Improper access control in QEMU
• Improper access control in linux-vanilla (Alpine package)
• Improper access control in linux-grsec (Alpine package)
• Improper access control in qemu (Alpine package)