CVE-2016-10013
published 2017-01-26CVE-2016-10013: Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
PriorityP338high7.8CVSS 3.0
AVLACLPRLUINSUCHIHAH
EPSS
0.42%
34.4th percentile
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.8.0-1 (bookworm) | xen 4.8.0-1 (bookworm) |
| xen | xen | <= 4.8.0 | — |
| xen | xen | >= 0 < 4.8.0-1 | 4.8.0-1 |
| xen | xen | >= 0 < 4.8.0-1 | 4.8.0-1 |
| xen | xen | >= 0 < 4.8.0-1 | 4.8.0-1 |
| xen | xen | >= 0 < 4.8.0-1 | 4.8.0-1 |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
nvdv2.04.6MEDIUMAV:L/AC:L/Au:N/C:P/I:P/A:P
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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GHSA
GHSA-wc5c-mc82-hwrm: Xen through 4
ghsa_unreviewed·2022-05-17
CVE-2016-10013 [HIGH] GHSA-wc5c-mc82-hwrm: Xen through 4
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
OSV
CVE-2016-10013: Xen through 4
osv·2017-01-26·CVSS 7.8
CVE-2016-10013 [HIGH] CVE-2016-10013: Xen through 4
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
Red Hat
xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
vendor_redhat·2016-12-19·CVSS 7.8
CVE-2016-10013 [HIGH] xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
Package: xen (Red Hat Enterprise Linux 5) - Will not fix
Debian
CVE-2016-10013: xen - Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges ...
vendor_debian·2016·CVSS 7.8
CVE-2016-10013 [HIGH] CVE-2016-10013: xen - Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges ...
Xen through 4.8.x allows local 64-bit x86 HVM guest OS users to gain privileges by leveraging mishandling of SYSCALL singlestep during emulation.
Scope: local
bookworm: resolved (fixed in 4.8.0-1)
bullseye: resolved (fixed in 4.8.0-1)
forky: resolved (fixed in 4.8.0-1)
sid: resolved (fixed in 4.8.0-1)
trixie: resolved (fixed in 4.8.0-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
bugzilla·2016-12-20·CVSS 7.8
CVE-2016-10013 [HIGH] CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204)
ISSUE DESCRIPTION
The typical behaviour of singlestepping exceptions is determined at the start of the instruction, with a #DB trap being raised at the end of the instruction.
SYSCALL (and SYSRET, although we don't implement it) behave differently because the typical behaviour allows userspace to escalate its privilege. (This difference in behaviour seems to be undocumented.)
Xen wrongly raised the exception based on the flags at the start of the instruction.
IMPACT
Guest userspace which can invoke the instruction emulator can use this flaw to escalate its privilege to that of the guest kernel.
VULNERABLE SYSTEMS
All Xen versions are affected.
The vulnerability is only exposed to 64-bit x86 HVM g
Bugzilla
CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204) [fedora-all]
bugzilla·2016-12-20·CVSS 7.8
CVE-2016-10013 [HIGH] CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204) [fedora-all]
CVE-2016-10013 xen: x86: Mishandling of SYSCALL singlestep during emulation (XSA-204) [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 issue affects multiple s
http://www.debian.org/security/2017/dsa-3847http://www.securityfocus.com/bid/94963http://www.securitytracker.com/id/1037491http://xenbits.xen.org/xsa/advisory-204.htmlhttp://www.debian.org/security/2017/dsa-3847http://www.securityfocus.com/bid/94963http://www.securitytracker.com/id/1037491http://xenbits.xen.org/xsa/advisory-204.html
2017-01-26
Published