CVE-2020-15564
published 2020-07-07CVE-2020-15564: An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in…
PriorityP424medium6.5CVSS 3.1
AVLACLPRLUINSCCNINAH
EPSS
0.40%
32.5th percentile
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.
Affected
10 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 | — | — |
| 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
nvdv2.04.9MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu5.5MEDIUM
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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-m5jw-hjp2-vr52: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-24
CVE-2020-15564 [MEDIUM] CWE-119 GHSA-m5jw-hjp2-vr52: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnera
OSV
CVE-2020-15564: An issue was discovered in Xen through 4
osv·2020-07-07·CVSS 6.5
CVE-2020-15564 [MEDIUM] CVE-2020-15564: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnera
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: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
vendor_redhat·2020-07-07·CVSS 6.5
CVE-2020-15564 [MEDIUM] CWE-20 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Deni
Debian
CVE-2020-15564: xen - An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to ca...
vendor_debian·2020·CVSS 6.5
CVE-2020-15564 [MEDIUM] CVE-2020-15564: xen - An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to ca...
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnera
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327) [fedora-all]
bugzilla·2020-07-07·CVSS 6.5
CVE-2020-15564 [MEDIUM] CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327) [fedora-all]
CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327) [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 affe
Bugzilla
CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
bugzilla·2020-06-26·CVSS 6.5
CVE-2020-15564 [MEDIUM] CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
CVE-2020-15564 xen: missing alignment check in VCPUOP_register_vcpu_info leads to DoS (XSA-327)
The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions which require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address.
Discussion:
Acknowledgments:
Name: the Xen project
---
Statement:
Only ARM systems are vulnerable, x86 systems are not affected by this flaw.
---
External References:
https://xenbits.xen.org/xsa/advisory-327.html
---
Created
http://www.openwall.com/lists/oss-security/2020/07/07/5http://xenbits.xen.org/xsa/advisory-327.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://www.openwall.com/lists/oss-security/2020/07/07/5http://xenbits.xen.org/xsa/advisory-327.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