CVE-2017-12135
First published: Wed Aug 02 2017(Updated: )
ISSUE DESCRIPTION ================= Code to handle copy operations on transitive grants has built in retry logic, involving a function reinvoking itself with unchanged parameters. Such use assumes that the compiler would also translate this to a so called "tail call" when generating machine code. Empirically, this is not commonly the case, allowing for theoretically unbounded nesting of such function calls. IMPACT ====== A malicious or buggy guest may be able to crash Xen. Privilege escalation and information leaks cannot be ruled out. VULNERABLE SYSTEMS ================== All versions of Xen are vulnerable. MITIGATION ========== There is no known mitigation. External References: <a href="http://xenbits.xen.org/xsa/advisory-226.html">http://xenbits.xen.org/xsa/advisory-226.html</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen XAPI | ||
| XenServer | =6.0.2 | |
| XenServer | =6.2.0 | |
| XenServer | =6.5 | |
| XenServer | =7.0 | |
| XenServer | =7.1 | |
| XenServer | =7.2 | |
| Debian | =8.0 | |
| Debian | =9.0 |
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Reference Links
- http://xenbits.xen.org/xsa/advisory-226.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1481765
- https://bugzilla.redhat.com/show_bug.cgi?id=1477655
- http://www.debian.org/security/2017/dsa-3969
- http://www.openwall.com/lists/oss-security/2017/08/15/1
- http://www.openwall.com/lists/oss-security/2017/08/17/6
- http://www.openwall.com/lists/oss-security/2020/04/14/4
- http://www.securityfocus.com/bid/100344
- http://www.securitytracker.com/id/1039178
- https://security.gentoo.org/glsa/201801-14
- https://support.citrix.com/article/CTX225941
Frequently Asked Questions
What is the severity of CVE-2017-12135?
The severity of CVE-2017-12135 is rated high with a score of 8.8.
How do I fix CVE-2017-12135?
To fix CVE-2017-12135, apply the latest security patches or upgrades provided by the software vendor.
What types of systems are affected by CVE-2017-12135?
CVE-2017-12135 affects various versions of Xen, Citrix XenServer, and Debian Linux.
Can CVE-2017-12135 be exploited remotely?
CVE-2017-12135 primarily requires local OS guest access, making remote exploitation unlikely.
What are the potential impacts of CVE-2017-12135?
The potential impacts of CVE-2017-12135 include denial of service and possible unauthorized privilege escalation.
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