PT-2015-7634 · Xen+1 · Xen+1

好风 + 1 · Published 2015-10-29 · Updated 2024-06-15 · CVE-2015-7835

Positive Technologies (AI Summary)

CVSS v2.0

7.2

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Xen versions 3.4 through 4.6.x

Description The issue arises from the mod l2 entry function in arch/x86/mm.c, which fails to properly validate level 2 page table entries. This allows local PV guest administrators to gain privileges by creating a crafted superpage mapping.

Recommendations For Xen versions 3.4 through 4.6.x, consider restricting access to the mod l2 entry function until a patch is available. As a temporary workaround, limit the creation of superpage mappings to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Weakness Enumeration

CWE-20

CWE-264

Related Identifiers

CVE-2015-7835

DSA-3390-1

MGASA-2016-0098

OPENSUSE-SU-2015_1964-1

OPENSUSE-SU-2015_2003-1

OPENSUSE-SU-2024:10196-1

SUSE-SU-2015:1853-1

SUSE-SU-2015:1894-1

SUSE-SU-2015:1908-1

SUSE-SU-2015:1952-1

SUSE-SU-2015:2324-1

SUSE-SU-2015:2328-1

SUSE-SU-2015:2338-1

Affected Products

Suse

Xen

References · 269

• https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txt · Vendor Advisory
• http://debian.org/security/2015/dsa-3390 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10196-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2015-7835 · Vendor Advisory
• https://osv.dev/vulnerability/MGASA-2016-0098 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2016-0098.html · Security Note
• http://xenbits.xen.org/xsa/advisory-148.html · Vendor Advisory
• https://security-tracker.debian.org/tracker/source-package/xen · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.html · Vendor Advisory
• http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2015:2324-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2015-11313 · Security Note
• https://ubuntu.com/security/CVE-2015-7835 · Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2015:2338-1 · Vendor Advisory