Auth bypass in Citrix Xenserver
CVE-2015-4106
QEMU does not properly restrict write access to the PCI config space for certain PCI pass-through devices, which might allow local x86 HVM guests to gain privileges, cause a denial of service (host crash), obtain sensitive information, or possibly have other unspecified impact via unknown vectors.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v2 metric
CVSS v2 base score 4.6 (Medium). Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.005 (39.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Citrix Xenserver — versions 6.0, 6.0.2, 6.1.0
- Qemu
- Canonical Ubuntu Linux — versions 12.04, 14.04, 14.10
- Debian Linux — versions 7.0, 8.0
- Fedoraproject Fedora — versions 20, 21, 22
- SUSE Linux Enterprise Desktop — versions 11, 12
- SUSE Linux Enterprise Server — versions 11, 12
- SUSE Linux Enterprise Software Development Kit — versions 11, 12
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ubuntu.com/usn/USN-2630-1 (vendor-advisory, Third Party Advisory)
- support.citrix.com/article/CTX206006 (Third Party Advisory)
- www.debian.org/security/2015/dsa-3286 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-06/msg00029.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-June/160154.html (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2015/dsa-3284 (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/74949 (VDB Entry, Third Party Advisory, vdb-entry)
- xenbits.xen.org/xsa/advisory-131.html (Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2015-06/msg00030.html (vendor-advisory, Mailing List, Third Party Advisory)
- support.citrix.com/article/CTX201145 (Third Party Advisory)
Frequently asked questions
- What is CVE-2015-4106?
- CVE-2015-4106 is a vulnerability in Citrix Xenserver, classified under Incorrect Authorization. Published 2015-06-03.
- Is CVE-2015-4106 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.