CVE-2016-3159

CWE-200 — Information ExposureCWE-284 — Improper Access Control9 documents8 sources
Severity
3.8LOW
EPSS
0.0%
top 89.06%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
XEN XENDebian Debian LinuxFedoraproject Fedora+1 more
Timeline
PublishedApr 13
Latest updateMay 14

Description

The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle writes to the hardware FSW.ES bit when running on AMD64 processors, which allows local guest OS users to obtain sensitive register content information from another guest by leveraging pending exception and mask bits. NOTE: this vulnerability exists because of an incorrect fix for CVE-2013-2076.

CVSS vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:NExploitability: 2.0 | Impact: 1.4

Affected Packages3 packages

▶Debianxen< 4.8.0~rc3-1+3
▶NVDxen/xen4.3.0 — 4.3.4+3
▶NVDoracle/vm_server3.3, 3.4+1

Also affects: Debian Linux 8.0, Fedora 22, 23

Patches

Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗Patch: xenbits.xen.org ↗

🔴Vulnerability Details

3
GHSA
GHSA-h55q-7cr6-wwr6: The fpu_fxrstor function in arch/x86/i387↗2022-05-14
▶
OSV
CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387↗2016-04-13
▶
CVEList
CVE-2016-3159: The fpu_fxrstor function in arch/x86/i387↗2016-04-13
▶

📋Vendor Advisories

3
Red Hat
xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172)↗2016-03-24
▶
Debian
CVE-2016-3159: xen - The fpu_fxrstor function in arch/x86/i387.c in Xen 4.x does not properly handle ...↗2016
▶
Apache
Apache camel: CVE-2017-3159↗
▶

💬Community

2
Bugzilla
CVE-2016-3158 CVE-2016-3159 xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172) [fedora-all]↗2016-03-29
▶
Bugzilla
CVE-2016-3158 CVE-2016-3159 xen: AMD FPU FIP/FDP/FOP leak workaround broken (XSA-172)↗2016-03-15
▶
CVE-2016-3159 (LOW CVSS 3.8) | The fpu_fxrstor function in arch/x8 | cvebase.io