Описание
Security update for xen
This update for xen fixes the following issues:
- CVE-2022-26363, CVE-2022-26364: Fixed insufficient care with non-coherent mappings (XSA-402) (bsc#1199966).
- CVE-2022-21123, CVE-2022-21125, CVE-2022-21166: Fixed MMIO stale data vulnerabilities on x86 (XSA-404) (bsc#1200549).
- CVE-2022-26362: Fixed a race condition in typeref acquisition (XSA-401) (bsc#1199965).
- CVE-2022-33745: Fixed insufficient TLB flush for x86 PV guests in shadow mode (XSA-408) (bsc#1201394).
- CVE-2022-23816, CVE-2022-23825, CVE-2022-29900: Fixed RETBLEED vulnerability, arbitrary speculative code execution with return instructions (XSA-407) (bsc#1201469).
Список пакетов
SUSE Linux Enterprise Server 12 SP4-LTSS
SUSE Linux Enterprise Server for SAP Applications 12 SP4
SUSE OpenStack Cloud 9
SUSE OpenStack Cloud Crowbar 9
Ссылки
- Link for SUSE-SU-2022:2560-1
- E-Mail link for SUSE-SU-2022:2560-1
- SUSE Security Ratings
- SUSE Bug 1199965
- SUSE Bug 1199966
- SUSE Bug 1200549
- SUSE Bug 1201394
- SUSE Bug 1201469
- SUSE CVE CVE-2022-21123 page
- SUSE CVE CVE-2022-21125 page
- SUSE CVE CVE-2022-21166 page
- SUSE CVE CVE-2022-23816 page
- SUSE CVE CVE-2022-23825 page
- SUSE CVE CVE-2022-26362 page
- SUSE CVE CVE-2022-26363 page
- SUSE CVE CVE-2022-26364 page
- SUSE CVE CVE-2022-29900 page
- SUSE CVE CVE-2022-33745 page
Описание
Incomplete cleanup of multi-core shared buffers for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
Затронутые продукты
Ссылки
- CVE-2022-21123
- SUSE Bug 1199650
- SUSE Bug 1200549
- SUSE Bug 1209075
Описание
Incomplete cleanup of microarchitectural fill buffers on some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
Затронутые продукты
Ссылки
- CVE-2022-21125
- SUSE Bug 1199650
- SUSE Bug 1200549
- SUSE Bug 1209074
Описание
Incomplete cleanup in specific special register write operations for some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access.
Затронутые продукты
Ссылки
- CVE-2022-21166
- SUSE Bug 1199650
- SUSE Bug 1200549
- SUSE Bug 1209073
Описание
** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate is unused by its CNA. Notes: none.
Затронутые продукты
Ссылки
- CVE-2022-23816
- SUSE Bug 1201456
- SUSE Bug 1201469
Описание
Aliases in the branch predictor may cause some AMD processors to predict the wrong branch type potentially leading to information disclosure.
Затронутые продукты
Ссылки
- CVE-2022-23825
- SUSE Bug 1201457
- SUSE Bug 1201469
- SUSE Bug 1205209
Описание
x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.
Затронутые продукты
Ссылки
- CVE-2022-26362
- SUSE Bug 1199965
Описание
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Затронутые продукты
Ссылки
- CVE-2022-26363
- SUSE Bug 1199966
Описание
x86 pv: Insufficient care with non-coherent mappings T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, Xen's safety logic doesn't account for CPU-induced cache non-coherency; cases where the CPU can cause the content of the cache to be different to the content in main memory. In such cases, Xen's safety logic can incorrectly conclude that the contents of a page is safe.
Затронутые продукты
Ссылки
- CVE-2022-26364
- SUSE Bug 1199966
Описание
Mis-trained branch predictions for return instructions may allow arbitrary speculative code execution under certain microarchitecture-dependent conditions.
Затронутые продукты
Ссылки
- CVE-2022-29900
- SUSE Bug 1199657
- SUSE Bug 1201469
- SUSE Bug 1207894
Описание
insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.
Затронутые продукты
Ссылки
- CVE-2022-33745
- SUSE Bug 1201394