Vulnerability Monitor

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CVE-2020-27672

An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.

Published

2020-10-22T21:15:13.950

Last Modified

2024-11-21T05:21:38.207

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.0 (HIGH)

CVSSv2 Vector

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

Access Vector: LOCAL
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: COMPLETE
Integrity Impact: COMPLETE
Availability Impact: COMPLETE

Exploitability Score

3.4

Impact Score

10.0

Weaknesses

Type: Primary
CWE-362
CWE-416

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xen	xen	≤ 4.14.0	Yes
Operating System	fedoraproject	fedora	31	Yes
Operating System	opensuse	leap	15.1	Yes
Operating System	opensuse	leap	15.2	Yes
Operating System	debian	debian_linux	10.0	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html Mailing List, Third Party Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html Mailing List, Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/01/19/7 Mailing List, Third Party Advisory ([email protected])
http://xenbits.xen.org/xsa/advisory-345.html Patch, Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ ([email protected])
https://security.gentoo.org/glsa/202011-06 Third Party Advisory ([email protected])
https://www.debian.org/security/2020/dsa-4804 Third Party Advisory ([email protected])
https://xenbits.xen.org/xsa/advisory-345.html Patch, Vendor Advisory ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2021/01/19/7 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-345.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XIK57QJOVOPWH6RFRNMGOBCROBCKMDG2/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202011-06 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2020/dsa-4804 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://xenbits.xen.org/xsa/advisory-345.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)