CVE-2014-7155
published 2014-10-02CVE-2014-7155: The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local…
PriorityP421medium5.8CVSS 2.0
AVAACLAuNCPIPAP
EPSS
0.97%
57.9th percentile
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
Affected
47 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | xen | < xen 4.4.1-3 (bookworm) | xen 4.4.1-3 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| opensuse | opensuse | — | — |
| opensuse | opensuse | — | — |
| xen | xen | <= 4.4.0 | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
| xen | xen | — | — |
CVSS provenance
nvdv2.05.8MEDIUMAV:A/AC:L/Au:N/C:P/I:P/A:P
osv5.8MEDIUM
vendor_debian5.8MEDIUM
vendor_redhat5.8MEDIUM
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Red Hat
kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
vendor_redhat·2014-09-23·CVSS 5.8
CVE-2014-7155 [MEDIUM] CWE-862 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
Statement: Not vulnerable.
This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
Package: kernel-xen (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2014-7155: xen - The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and ...
vendor_debian·2014·CVSS 5.8
CVE-2014-7155 [MEDIUM] CVE-2014-7155: xen - The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and ...
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
Scope: local
bookworm: resolved (fixed in 4.4.1-3)
bullseye: resolved (fixed in 4.4.1-3)
forky: resolved (fixed in 4.4.1-3)
sid: resolved (fixed in 4.4.1-3)
trixie: resolved (fixed in 4.4.1-3)
GHSA
GHSA-7w7p-f566-6r85: The x86_emulate function in arch/x86/x86_emulate/x86_emulate
ghsa_unreviewed·2022-05-14
CVE-2014-7155 [MEDIUM] GHSA-7w7p-f566-6r85: The x86_emulate function in arch/x86/x86_emulate/x86_emulate
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
OSV
CVE-2014-7155: The x86_emulate function in arch/x86/x86_emulate/x86_emulate
osv·2014-10-02·CVSS 5.8
CVE-2014-7155 [MEDIUM] CVE-2014-7155: The x86_emulate function in arch/x86/x86_emulate/x86_emulate
The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (xsa105) [fedora-all]
bugzilla·2014-09-23·CVSS 5.8
CVE-2014-7155 [MEDIUM] CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (xsa105) [fedora-all]
CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (xsa105) [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this
Bugzilla
CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
bugzilla·2014-09-10·CVSS 5.8
CVE-2014-7155 [MEDIUM] CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
CVE-2014-7155 kernel: xen: Missing privilege level checks in x86 HLT, LGDT, LIDT, and LMSW emulation (XSA-105)
The emulation of the instructions HLT, LGDT, LIDT, and LMSW fails to
perform supervisor mode permission checks.
Malicious HVM guest user mode code may be able to crash the guest or
escalate its own privilege to guest kernel mode.
Acknowledgements:
Red Hat would like to thank the Xen for reporting this issue.
Discussion:
Statement:
Not vulnerable.
This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
---
Created xen tracking bugs for this issue:
Affects: fedora-all [bug 1145737]
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htmlhttp://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.htmlhttp://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.htmlhttp://secunia.com/advisories/61858http://secunia.com/advisories/61890http://security.gentoo.org/glsa/glsa-201412-42.xmlhttp://support.citrix.com/article/CTX200218http://www.debian.org/security/2014/dsa-3041http://www.securityfocus.com/bid/70057http://www.securitytracker.com/id/1030888http://xenbits.xen.org/xsa/advisory-105.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.htmlhttp://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.htmlhttp://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.htmlhttp://secunia.com/advisories/61858http://secunia.com/advisories/61890http://security.gentoo.org/glsa/glsa-201412-42.xmlhttp://support.citrix.com/article/CTX200218http://www.debian.org/security/2014/dsa-3041http://www.securityfocus.com/bid/70057http://www.securitytracker.com/id/1030888http://xenbits.xen.org/xsa/advisory-105.html
2014-10-02
Published