CVE-2020-15563
published 2020-07-07CVE-2020-15563: An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty…
PriorityP425medium6.5CVSS 3.1
AVLACLPRLUINSCCNINAH
EPSS
0.41%
33.5th percentile
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage the vulnerability. x86 PV guests, as well as x86 HVM guests using hardware assisted paging (HAP), cannot leverage the vulnerability.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | xen | < xen 4.11.4+24-gddaaccbbab-1 (bookworm) | xen 4.11.4+24-gddaaccbbab-1 (bookworm) |
| fedoraproject | fedora | — | — |
| fedoraproject | fedora | — | — |
| opensuse | leap | — | — |
| xen | xen | >= 0 < 4.11.4+24-gddaaccbbab-1 | 4.11.4+24-gddaaccbbab-1 |
| xen | xen | >= 0 < 4.11.4+24-gddaaccbbab-1 | 4.11.4+24-gddaaccbbab-1 |
| xen | xen | >= 0 < 4.11.4+24-gddaaccbbab-1 | 4.11.4+24-gddaaccbbab-1 |
| xen | xen | >= 0 < 4.11.4+24-gddaaccbbab-1 | 4.11.4+24-gddaaccbbab-1 |
| xen | xen | >= 0 < 4.11.3+24-g14b62ab3e5-1ubuntu2.3 | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
| xen | xen | 4.8.0 – 4.13.1 | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
nvdv2.04.7MEDIUMAV:L/AC:M/Au:N/C:N/I:N/A:C
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu5.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
xen vulnerabilities
osv·2022-09-19·CVSS 5.5
CVE-2020-0543 [MEDIUM] xen vulnerabilities
xen vulnerabilities
It was discovered that memory contents previously stored in
microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY
read operations on Intel client and Xeon E3 processors may be briefly
exposed to processes on the same or different processor cores. A local
attacker could use this to expose sensitive information. (CVE-2020-0543)
Julien Grall discovered that Xen incorrectly handled memory barriers on
ARM-based systems. An attacker could possibly use this issue to cause a
denial of service, obtain sensitive information or escalate privileges.
(CVE-2020-11739)
Ilja Van Sprundel discovered that Xen incorrectly handled profiling of
guests. An unprivileged attacker could use this issue to obtain sensitive
information from other guests, cause a denial of s
GHSA
GHSA-wwfw-7rgm-hmmc: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-24
CVE-2020-15563 [MEDIUM] CWE-119 GHSA-wwfw-7rgm-hmmc: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage
OSV
CVE-2020-15563: An issue was discovered in Xen through 4
osv·2020-07-07·CVSS 6.5
CVE-2020-15563 [MEDIUM] CVE-2020-15563: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage
Ubuntu
Xen vulnerabilities
vendor_ubuntu·2022-09-19·CVSS 5.5
CVE-2020-25599 [MEDIUM] Xen vulnerabilities
Title: Xen vulnerabilities
Summary: Several security issues were fixed in Xen.
It was discovered that memory contents previously stored in
microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY
read operations on Intel client and Xeon E3 processors may be briefly
exposed to processes on the same or different processor cores. A local
attacker could use this to expose sensitive information. (CVE-2020-0543)
Julien Grall discovered that Xen incorrectly handled memory barriers on
ARM-based systems. An attacker could possibly use this issue to cause a
denial of service, obtain sensitive information or escalate privileges.
(CVE-2020-11739)
Ilja Van Sprundel discovered that Xen incorrectly handled profiling of
guests. An unprivileged attacker could use this issue to obtain
Red Hat
xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
vendor_redhat·2020-07-07·CVSS 6.5
CVE-2020-15563 [MEDIUM] CWE-822 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typic
Debian
CVE-2020-15563: xen - An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users t...
vendor_debian·2020·CVSS 6.5
CVE-2020-15563 [MEDIUM] CVE-2020-15563: xen - An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users t...
An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319) [fedora-all]
bugzilla·2020-07-07·CVSS 6.5
CVE-2020-15563 [MEDIUM] CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319) [fedora-all]
CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319) [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects mu
Bugzilla
CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
bugzilla·2020-06-26·CVSS 6.5
CVE-2020-15563 [MEDIUM] CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
CVE-2020-15563 xen: inverted code paths in x86 dirty VRAM tracking leads to DoS (XSA-319)
A vulnerability was found in xen, where a malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host.
Discussion:
Acknowledgments:
Name: the Xen project
---
Statement:
Xen versions 4.7 and earlier are not affected by this flaw. Arm systems are not affected, only x86 HVM guests using shadow paging can leverage the vulnerability. In addition there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage the vulnerability. x86 PV guests as well as x86 HVM guest using hardware assisted paging (HAP) cannot leverage the vulnerability.
---
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.htmlhttp://www.openwall.com/lists/oss-security/2020/07/07/3http://xenbits.xen.org/xsa/advisory-319.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/https://security.gentoo.org/glsa/202007-02https://www.debian.org/security/2020/dsa-4723http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00024.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00031.htmlhttp://www.openwall.com/lists/oss-security/2020/07/07/3http://xenbits.xen.org/xsa/advisory-319.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MXESCOVI7AVRNC7HEAMFM7PMEO6D3AUH/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VB3QJJZV23Z2IDYEMIHELWYSQBUEW6JP/https://security.gentoo.org/glsa/202007-02https://www.debian.org/security/2020/dsa-4723
2020-07-07
Published