CVE-2017-17563: Buffer Overflow
First published: Tue Dec 12 2017(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/xen | 4.11.4+107-gef32c7afa2-1 4.14.6-1 4.14.5+94-ge49571868d-1 4.17.1+2-gb773c48e36-1 4.17.2+55-g0b56bed864-1 | |
| Xen xen-unstable | <=4.9.1 |
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Reference Links
- https://xenbits.xen.org/xsa/advisory-249.html
- https://security-tracker.debian.org/tracker/CVE-2017-17563
- http://www.openwall.com/lists/oss-security/2017/12/12/2
- http://www.securityfocus.com/bid/102169
- http://www.securitytracker.com/id/1040769
- https://lists.debian.org/debian-lts-announce/2018/01/msg00003.html
- https://lists.debian.org/debian-lts-announce/2018/10/msg00009.html
- https://security.gentoo.org/glsa/201801-14
- https://support.citrix.com/article/CTX232096
- https://www.debian.org/security/2018/dsa-4112
Frequently Asked Questions
What is the severity of CVE-2017-17563?
CVE-2017-17563 has a medium severity level due to its potential for denial of service and privilege escalation.
How do I fix CVE-2017-17563?
To fix CVE-2017-17563, users should upgrade to a fixed version of Xen, specifically those versions higher than 4.9.1.
What are the potential impacts of CVE-2017-17563?
The potential impacts of CVE-2017-17563 include denial of service resulting in host OS crashes and the ability for guest OS users to gain host OS privileges.
Which versions of Xen are affected by CVE-2017-17563?
Xen versions 4.9.x and lower are affected by CVE-2017-17563.
Can CVE-2017-17563 be exploited remotely?
CVE-2017-17563 is primarily a local exploit, meaning it requires access to the guest OS to exploit the vulnerability.
- collector/security-tracker-debian
- agent/references
- agent/type
- agent/softwarecombine
- agent/last-modified-date
- agent/first-publish-date
- agent/description
- agent/remedy
- agent/weakness
- agent/severity
- agent/author
- agent/tags
- agent/event
- collector/nvd-index
- agent/software-canonical-lookup-request
- package-manager/debian
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.9.1