Resource management error in Xen - CVE-2015-4164
Published: June 15, 2015 / Updated: August 9, 2020
Vulnerability identifier: #VU40713
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-4164
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The compat_iret function in Xen 3.1 through 4.5 iterates the wrong way through a loop, which allows local 32-bit PV guest administrators to cause a denial of service (large loop and system hang) via a hypercall_iret call with EFLAGS.VM set.
Affected software
Xen
SUSE Linux
Fedora
xen
SUSE Linux
Fedora
xen
How to mitigate CVE-2015-4164
Install update from vendor's website.
xen - addressed in versions 4.4.2-6.fc21, 4.5.0-11.fc22
External References
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html
- http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00027.html
- http://support.citrix.com/article/CTX201145
- http://www.debian.org/security/2015/dsa-3286
- http://www.securityfocus.com/bid/75149
- http://www.securitytracker.com/id/1032569
- http://xenbits.xen.org/xsa/advisory-136.html
- https://security.gentoo.org/glsa/201604-03