Test ID:	1.3.6.1.4.1.25623.1.1.2.2023.1388
Category:	Huawei EulerOS Local Security Checks
Title:	Huawei EulerOS: Security Advisory for kernel (EulerOS-SA-2023-1388)
Summary:	The remote host is missing an update for the Huawei EulerOS 'kernel' package(s) announced via the EulerOS-SA-2023-1388 advisory.
Description:	Summary: The remote host is missing an update for the Huawei EulerOS 'kernel' package(s) announced via the EulerOS-SA-2023-1388 advisory. Vulnerability Insight: Linux PV device frontends vulnerable to attacks by backends [This CNA information record relates to multiple CVEs, the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn't check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: CVE-2022-23037 scsifront: CVE-2022-23038 gntalloc: CVE-2022-23039 xenbus: CVE-2022-23040 blkfront, netfront, scsifront, usbfront, dmabuf, xenbus, 9p, kbdfront, and pvcalls are using a functionality to delay freeing a grant reference until it is no longer in use, but the freeing of the related data page is not synchronized with dropping the granted access. As a result the backend can keep access to the memory page even after it has been freed and then re-used for a different purpose. CVE-2022-23041 netfront will fail a BUG_ON() assertion if it fails to revoke access in the rx path. This will result in a Denial of Service (DoS) situation of the guest which can be triggered by the backend. CVE-2022-23042(CVE-2022-23042) Linux PV device frontends vulnerable to attacks by backends [This CNA information record relates to multiple CVEs, the text explains which aspects/vulnerabilities correspond to which CVE.] Several Linux PV device frontends are using the grant table interfaces for removing access rights of the backends in ways being subject to race conditions, resulting in potential data leaks, data corruption by malicious backends, and denial of service triggered by malicious backends: blkfront, netfront, scsifront and the gntalloc driver are testing whether a grant reference is still in use. If this is not the case, they assume that a following removal of the granted access will always succeed, which is not true in case the backend has mapped the granted page between those two operations. As a result the backend can keep access to the memory page of the guest no matter how the page will be used after the frontend I/O has finished. The xenbus driver has a similar problem, as it doesn't check the success of removing the granted access of a shared ring buffer. blkfront: CVE-2022-23036 netfront: ... [Please see the references for more information on the vulnerabilities] Affected Software/OS: 'kernel' package(s) on Huawei EulerOS V2.0SP10(x86_64). Solution: Please install the updated package(s). CVSS Score: 4.4 CVSS Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2022-20008 https://source.android.com/security/bulletin/2022-05-01 Common Vulnerability Exposure (CVE) ID: CVE-2022-23040 https://xenbits.xenproject.org/xsa/advisory-396.txt https://lists.debian.org/debian-lts-announce/2022/07/msg00000.html Common Vulnerability Exposure (CVE) ID: CVE-2022-23042 Common Vulnerability Exposure (CVE) ID: CVE-2022-3524 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c52c6bb831f6335c176a0fc7214e26f43adbd11 https://vuldb.com/?id.211021 https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html https://lists.debian.org/debian-lts-announce/2022/12/msg00034.html Common Vulnerability Exposure (CVE) ID: CVE-2022-3542 Common Vulnerability Exposure (CVE) ID: CVE-2022-3565 https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=2568a7e0832ee30b0a351016d03062ab4e0e0a3f https://vuldb.com/?id.211088 Common Vulnerability Exposure (CVE) ID: CVE-2022-3566 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f49cd2f4d6170d27a2c61f1fecb03d8a70c91f57 https://vuldb.com/?id.211089 Common Vulnerability Exposure (CVE) ID: CVE-2022-3567 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=364f997b5cfe1db0d63a390fe7c801fa2b3115f6 https://vuldb.com/?id.211090 Common Vulnerability Exposure (CVE) ID: CVE-2022-3586 https://github.com/torvalds/linux/commit/9efd23297cca https://www.zerodayinitiative.com/advisories/upcoming/ https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html Common Vulnerability Exposure (CVE) ID: CVE-2022-3625 https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=6b4db2e528f650c7fb712961aac36455468d5902 https://vuldb.com/?id.211929 Common Vulnerability Exposure (CVE) ID: CVE-2022-3629 https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=7e97cfed9929eaabc41829c395eb0d1350fccb9d https://vuldb.com/?ctiid.211930 https://vuldb.com/?id.211930 Common Vulnerability Exposure (CVE) ID: CVE-2022-4129 FEDORA-2022-24041b1667 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JOKXNIM2R4FQCDRQV67UMAY6EBC72QFG/ FEDORA-2022-b36cd53dca https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7X5SPXMXXFANDASPCKER2JIQO2F3UHCP/ FEDORA-2022-e4460c41bc https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AM5KFIE6JNZXHBA5A2KYDZAT3MEX2B67/ https://lore.kernel.org/all/20221114191619.124659-1-jakub%40cloudflare.com/t https://lore.kernel.org/netdev/20221121085426.21315-1-jakub%40cloudflare.com/t https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html Common Vulnerability Exposure (CVE) ID: CVE-2022-43750 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.15 https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.1 https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a659daf63d16aa883be42f3f34ff84235c302198 https://github.com/torvalds/linux/commit/a659daf63d16aa883be42f3f34ff84235c302198
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