PT-2015-7623 · Xen · Xen

Julien Grall · Published 2015-10-30 · Updated 2018-10-30 · CVE-2015-7813

Positive Technologies (AI Summary)

CVSS v2.0

2.1

Low

Base vector

AV:L/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Xen versions 4.4.x through 4.6.x

Description The issue allows local guests to cause a denial of service by reporting unimplemented hypercalls without limiting the number of printk console messages. This can be achieved through a sequence of HYPERVISOR physdev op hypercalls, which are not properly handled in the do physdev op function in arch/arm/physdev.c, or HYPERVISOR hvm op hypercalls, which are not properly handled in the do hvm op function in arch/arm/hvm.c.

Recommendations For Xen versions 4.4.x through 4.6.x, consider restricting the use of the do physdev op and do hvm op functions until a patch is available. As a temporary workaround, limiting the number of printk console messages for unimplemented hypercalls may help mitigate the risk of denial of service. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Weakness Enumeration

CWE-399

Related Identifiers

CVE-2015-7813

DSA-3414-1

MGASA-2016-0098

Affected Products

Xen

References · 87

• http://debian.org/security/2015/dsa-3414 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2015-7813 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-3259 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2015-7813 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7970 · Security Note
• https://osv.dev/vulnerability/MGASA-2016-0098 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2015-7813 · Vendor Advisory
• https://security.gentoo.org/glsa/201604-03 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-12106 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7971 · Security Note
• http://xenbits.xen.org/xsa/advisory-146.html · Vendor Advisory
• https://advisories.mageia.org/MGASA-2016-0098.html · Security Note
• https://security-tracker.debian.org/tracker/DSA-3414-1 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7814 · Security Note
• https://ubuntu.com/security/CVE-2015-7813 · Vendor Advisory