CVE-2018-12893
published 2018-07-02CVE-2018-12893: An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions…
PriorityP423medium6.5CVSS 3.0
AVLACLPRLUINSCCNINAH
EPSS
0.41%
33.6th percentile
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | xen | < xen 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 (bookworm) | xen 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 (bookworm) |
| xen | xen | <= 4.10.0 | — |
| xen | xen | >= 0 < 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| xen | xen | >= 0 < 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| xen | xen | >= 0 < 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
| xen | xen | >= 0 < 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 | 4.8.3+xsa267+shim4.10.1+xsa267-1+deb9u9 |
CVSS provenance
nvdv3.06.5MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:N/I:N/A:P
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
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GHSA
GHSA-7589-4cgq-4p68: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-13
CVE-2018-12893 [MEDIUM] GHSA-7589-4cgq-4p68: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
OSV
CVE-2018-12893: An issue was discovered in Xen through 4
osv·2018-07-02·CVSS 6.5
CVE-2018-12893 [MEDIUM] CVE-2018-12893: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
Red Hat
xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
vendor_redhat·2018-06-27·CVSS 6.5
CVE-2018-12893 [MEDIUM] CWE-266 xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged us
Debian
CVE-2018-12893: xen - An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added...
vendor_debian·2018·CVSS 6.5
CVE-2018-12893 [MEDIUM] CVE-2018-12893: xen - An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added...
An issue was discovered in Xen through 4.10.x. One of the fixes in XSA-260 added some safety checks to help prevent Xen livelocking with debug exceptions. Unfortunately, due to an oversight, at least one of these safety checks can be triggered by a guest. A malicious PV guest can crash Xen, leading to a Denial of Service. All Xen systems which have applied the XSA-260 fix are vulnerable. Only x86 systems are vulnerable. ARM systems are not vulnerable. Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH guests cannot exploit the vulnerability. An attacker needs to be able to control hardware debugging facilities to exploit the vulnerability, but such permissions are typically available to unprivileged users.
Scope: local
bookworm: resolved (fixed in 4.8.3+xsa267+shim4.10.1+xsa
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265) [fedora-all]
bugzilla·2018-06-27·CVSS 6.5
CVE-2018-12893 [MEDIUM] CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265) [fedora-all]
CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265) [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-all.
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 mult
Bugzilla
CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
bugzilla·2018-06-13·CVSS 6.5
CVE-2018-12893 [MEDIUM] CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
CVE-2018-12893 xen: x86 DB exception safety check can be triggered by a guest (XSA-265)
ISSUE DESCRIPTION
One of the fixes in XSA-260 added some safety checks to help prevent Xen
livelocking with debug exceptions. Unfortunately, due to an oversight, at
least one of these safety checks can be triggered by a guest.
IMPACT
A malicious PV guest can crash Xen, leading to a Denial of Service.
VULNERABLE SYSTEMS
All Xen systems which have applied the XSA-260 fix are vulnerable.
Only x86 systems are vulnerable. ARM systems are not vulnerable.
Only x86 PV guests can exploit the vulnerability. x86 HVM and PVH
guests cannot exploit the vulnerability.
An attacker needs to be able to control hardware debugging facilities to
exploit the vulnerability, but such permissions are typically availabl
http://www.openwall.com/lists/oss-security/2018/06/27/11http://www.securityfocus.com/bid/104572http://www.securitytracker.com/id/1041202http://xenbits.xen.org/xsa/advisory-265.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1590979https://lists.debian.org/debian-lts-announce/2018/11/msg00013.htmlhttps://security.gentoo.org/glsa/201810-06https://support.citrix.com/article/CTX235748https://www.debian.org/security/2018/dsa-4236http://www.openwall.com/lists/oss-security/2018/06/27/11http://www.securityfocus.com/bid/104572http://www.securitytracker.com/id/1041202http://xenbits.xen.org/xsa/advisory-265.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1590979https://lists.debian.org/debian-lts-announce/2018/11/msg00013.htmlhttps://security.gentoo.org/glsa/201810-06https://support.citrix.com/article/CTX235748https://www.debian.org/security/2018/dsa-4236
2018-07-02
Published