CVE-2017-17563
published 2017-12-12CVE-2017-17563: An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an…
PriorityP337high7.8CVSS 3.0
AVLACHPRLUINSCCHIHAH
EPSS
0.35%
27.7th percentile
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 (bookworm) | xen 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 (bookworm) |
| xen | xen | <= 4.9.1 | — |
| xen | xen | >= 0 < 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 |
| xen | xen | >= 0 < 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 |
| xen | xen | >= 0 < 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 |
| xen | xen | >= 0 < 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 | 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5 |
CVSS provenance
nvdv3.07.8HIGHCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
nvdv2.06.9MEDIUMAV:L/AC:M/Au:N/C:C/I:C/A:C
osv7.8HIGH
vendor_debian7.8HIGH
vendor_redhat7.8HIGH
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Red Hat
xen: broken x86 shadow mode refcount overflow check (XSA-249)
vendor_redhat·2017-12-12·CVSS 7.8
CVE-2017-17563 [HIGH] xen: broken x86 shadow mode refcount overflow check (XSA-249)
xen: broken x86 shadow mode refcount overflow check (XSA-249)
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
Package: xen (Red Hat Enterprise Linux 5) - Not affected
Debian
CVE-2017-17563: xen - An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a ...
vendor_debian·2017·CVSS 7.8
CVE-2017-17563 [HIGH] CVE-2017-17563: xen - An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a ...
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
Scope: local
bookworm: resolved (fixed in 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5)
bullseye: resolved (fixed in 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5)
forky: resolved (fixed in 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5)
sid: resolved (fixed in 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5)
trixie: resolved (fixed in 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5)
GHSA
GHSA-6mhv-9623-3chf: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-14
CVE-2017-17563 [HIGH] CWE-119 GHSA-6mhv-9623-3chf: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
OSV
CVE-2017-17563: An issue was discovered in Xen through 4
osv·2017-12-12·CVSS 7.8
CVE-2017-17563 [HIGH] CVE-2017-17563: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.9.x allowing guest OS users to cause a denial of service (host OS crash) or gain host OS privileges by leveraging an incorrect mask for reference-count overflow checking in shadow mode.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2017-17563 CVE-2017-17564 CVE-2017-17565 CVE-2017-17566 xen: various flaws [fedora-all]
bugzilla·2017-12-12·CVSS 7.8
CVE-2017-17563 [HIGH] CVE-2017-17563 CVE-2017-17564 CVE-2017-17565 CVE-2017-17566 xen: various flaws [fedora-all]
CVE-2017-17563 CVE-2017-17564 CVE-2017-17565 CVE-2017-17566 xen: various flaws [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 multiple supp
Bugzilla
CVE-2017-17563 xsa249 xen: broken x86 shadow mode refcount overflow check (XSA-249)
bugzilla·2017-11-29·CVSS 7.8
CVE-2017-17563 [HIGH] CVE-2017-17563 xsa249 xen: broken x86 shadow mode refcount overflow check (XSA-249)
CVE-2017-17563 xsa249 xen: broken x86 shadow mode refcount overflow check (XSA-249)
ISSUE DESCRIPTION
Pages being used to run x86 guests in shadow mode are reference counted
to track their uses. Unfortunately the overflow check when trying to
obtain a new reference used a mask one bit wider than the reference
count actually is, rendering the entire check ineffective.
IMPACT
A malicious or buggy guest may cause a hypervisor crash, resulting in
a Denial of Service (DoS) affecting the entire host, or cause hypervisor
memory corruption. We cannot rule out a guest being able to escalate
its privilege.
VULNERABLE SYSTEMS
Xen versions 4.1 and later are affected. Xen versions 4.0 and earlier
are not affected.
x86 systems are vulnerable. ARM systems are not vulnerable.
Only guests run in sh
http://www.openwall.com/lists/oss-security/2017/12/12/2http://www.securityfocus.com/bid/102169http://www.securitytracker.com/id/1040769https://lists.debian.org/debian-lts-announce/2018/01/msg00003.htmlhttps://lists.debian.org/debian-lts-announce/2018/10/msg00009.htmlhttps://security.gentoo.org/glsa/201801-14https://support.citrix.com/article/CTX232096https://www.debian.org/security/2018/dsa-4112https://xenbits.xen.org/xsa/advisory-249.htmlhttp://www.openwall.com/lists/oss-security/2017/12/12/2http://www.securityfocus.com/bid/102169http://www.securitytracker.com/id/1040769https://lists.debian.org/debian-lts-announce/2018/01/msg00003.htmlhttps://lists.debian.org/debian-lts-announce/2018/10/msg00009.htmlhttps://security.gentoo.org/glsa/201801-14https://support.citrix.com/article/CTX232096https://www.debian.org/security/2018/dsa-4112https://xenbits.xen.org/xsa/advisory-249.html
2017-12-12
Published