CVE-2019-17345 — An issue was discovered in Xen 4

An issue was discovered in Xen 4.8.x through 4.11.x allowing x86 PV guest OS users to cause a denial of service because mishandling of failed IOMMU operations causes a bug check during the cleanup of a crashed guest.

01What is this vulnerability?

An issue was discovered in Xen 4.8.x through 4.11.x allowing x86 PV guest OS users to cause a denial of service because mishandling of failed IOMMU operations causes a bug check during the cleanup of a crashed guest.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-10-08T00:02:29.000Z
• Last modified: 2024-08-05T01:40:14.525Z

09References

• xenbits.xen.org — http://xenbits.xen.org/xsa/advisory-291.html
• xenbits.xen.org — https://xenbits.xen.org/xsa/advisory-291.html
• www.openwall.com — http://www.openwall.com/lists/oss-security/2019/10/25/4
• www.debian.org — https://www.debian.org/security/2020/dsa-4602
• seclists.org — https://seclists.org/bugtraq/2020/Jan/21