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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:161321
[Rus]
Version
2
Class
patch
ALTXid
368383
Language
English
Severity
High
Title
ELSA-2021-9450 -- Unbreakable Enterprise kernel security update
Description
- btrfs: fix race between marking inode needs to be logged and log syncing (Filipe Manana) [Orabug: 33349276]
- RDMA/cma: Revert INIT-INIT patch (Mike Marciniszyn) [Orabug: 33306518]
- rds: ib: Set SEND_SIGNALED on the last WR posted (Hakon Bugge) [Orabug: 33253169]
- vfio/pci: (fixup) Handle concurrent vma faults (Ankur Arora) [Orabug: 33200737] [Orabug: 33187733]
- xfs: dont drain buffer lru on freeze and read-only remount (Brian Foster) [Orabug: 33241131]
- xfs: rename xfs_wait_buftarg() to xfs_buftarg_drain() (Brian Foster) [Orabug: 33241131]
- rds: fix statistics counters and check for memory leak (Hans Westgaard Ry) [Orabug: 31372379]
Family
unix
Platform
Oracle Linux 7
Oracle Linux 8
Product
kernel-uek
Reference
VENDOR: ELSA-2021-9450
VENDOR: ELSA-2021-9450
Id:
ELSA-2021-9450
Reference:
http://linux.oracle.com/errata/ELSA-2021-9450.html
CVE: CVE-2021-3653
CVE: CVE-2021-3653
Id:
CVE-2021-3653
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3653
Comment
: A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "int_ctl" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.
CVSSv2 Score:
6.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:C
CVSSv3 Score:
8.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE:
862 (Missing Authorization)
References:
https://www.openwall.com/lists/oss-security/2021/08/16/1 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1983686 (MISC)
[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update (MLIST)
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html (MISC)
CVE: CVE-2020-36311
CVE: CVE-2020-36311
Id:
CVE-2020-36311
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36311
Comment
: An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184.
CVSSv2 Score:
2.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:N/I:N/A:P
CVSSv3 Score:
5.5
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9 (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03 (MISC)
[debian-lts-announce] 20210720 [SECURITY] [DLA 2714-1] linux-4.19 security update (MLIST)
DSA-4941 (DEBIAN)
CVE: CVE-2021-3573
CVE: CVE-2021-3573
Id:
CVE-2021-3573
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3573
Comment
: A use-after-free in function hci_sock_bound_ioctl() of the Linux kernel HCI subsystem was found in the way user calls ioct HCIUNBLOCKADDR or other way triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user could use this flaw to crash the system or escalate their privileges on the system. This flaw affects the Linux kernel versions prior to 5.13-rc5.
CVSSv2 Score:
6.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
6.4
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE:
362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'))
References:
https://bugzilla.redhat.com/show_bug.cgi?id=1966578 (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?id=e305509e678b3a4af2b3cfd410f409f7cdaabb52 (MISC)
https://www.openwall.com/lists/oss-security/2021/06/08/2 (MISC)
[oss-security] 20230702 CVE-2023-3439: Linux MCTP use-after-free in mctp_sendmsg (MLIST)
CVE: CVE-2021-3609
CVE: CVE-2021-3609
Id:
CVE-2021-3609
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3609
Comment
: .A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges. This race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.
CVSSv2 Score:
6.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
7
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE:
362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'))
References:
https://bugzilla.redhat.com/show_bug.cgi?id=1971651 (MISC)
https://github.com/torvalds/linux/commit/d5f9023fa61ee8b94f37a93f08e94b136cf1e463 (MISC)
https://github.com/nrb547/kernel-exploitation/blob/main/cve-2021-3609/cve-2021-3609.md (MISC)
https://www.openwall.com/lists/oss-security/2021/06/19/1 (MISC)
https://security.netapp.com/advisory/ntap-20220419-0004/ (CONFIRM)
CVE: CVE-2021-22543
CVE: CVE-2021-22543
Id:
CVE-2021-22543
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22543
Comment
: An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.
CVSSv2 Score:
4.6
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSSv3 Score:
7.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE:
119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)
References:
https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584 (MISC)
[oss-security] 20210626 Re: CVE-2021-22543 - /dev/kvm LPE (MLIST)
https://security.netapp.com/advisory/ntap-20210708-0002/ (CONFIRM)
[debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update (MLIST)
FEDORA-2021-fe826f202e ()
FEDORA-2021-95f2f1cfc7 ()
CVE: CVE-2021-3656
CVE: CVE-2021-3656
Id:
CVE-2021-3656
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3656
Comment
: A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the "virt_ext" field, this issue could allow a malicious L1 to disable both VMLOAD/VMSAVE intercepts and VLS (Virtual VMLOAD/VMSAVE) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape.
CVSSv2 Score:
7.2
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSSv3 Score:
8.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE:
862 (Missing Authorization)
References:
https://www.openwall.com/lists/oss-security/2021/08/16/1 (MISC)
https://github.com/torvalds/linux/commit/c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1983988 (MISC)
https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=c7dfa4009965a9b2d7b329ee970eb8da0d32f0bc (MISC)
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