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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:146467
[Rus]
Version
2
Class
patch
ALTXid
346010
Language
English
Severity
Medium
Title
USN-4708-1 -- Linux kernel vulnerabilities
Description
Wen Xu discovered that the XFS filesystem implementation in the Linuxkernel did not properly track inode validations.
An attacker could use thisto construct a malicious XFS image that, when mounted, could cause a denialof service (system crash). (CVE-2018-13093)
Family
unix
Platform
Linux Mint 17.x
Linux Mint 18.x
Ubuntu 14.04
Ubuntu 16.04
Product
linux
linux-lts-xenial
Reference
VENDOR: USN-4708-1
VENDOR: USN-4708-1
Id:
USN-4708-1
Reference:
https://ubuntu.com/security/notices/USN-4708-1
CVE: CVE-2018-13093
CVE: CVE-2018-13093
Id:
CVE-2018-13093
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-13093
Comment
: An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.
CVSSv2 Score:
4.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:N/A:P
CVSSv3 Score:
5.5
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE:
476 (NULL Pointer Dereference)
References:
https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff (MISC)
https://bugzilla.kernel.org/show_bug.cgi?id=199367 (MISC)
https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff (MISC)
RHSA-2019:2043 (REDHAT)
RHSA-2019:2029 (REDHAT)
USN-4094-1 (UBUNTU)
USN-4118-1 (UBUNTU)
[debian-lts-announce] 20200302 [SECURITY] [DLA 2114-1] linux-4.9 security update (MLIST)
CVE: CVE-2019-19813
CVE: CVE-2019-19813
Id:
CVE-2019-19813
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19813
Comment
: In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c. This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c.
CVSSv2 Score:
7.1
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:N/I:N/A:C
CVSSv3 Score:
5.5
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE:
416 (Use After Free)
References:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19813 (MISC)
https://security.netapp.com/advisory/ntap-20200103-0001/ (CONFIRM)
USN-4414-1 (UBUNTU)
[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update (MLIST)
CVE: CVE-2019-19816
CVE: CVE-2019-19816
Id:
CVE-2019-19816
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19816
Comment
: In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.
CVSSv2 Score:
9.3
Access vector:
NETWORK
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
7.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
NONE
User interaction:
REQUIRED
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE:
787 (Out-of-bounds Write)
References:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19816 (MISC)
https://security.netapp.com/advisory/ntap-20200103-0001/ (CONFIRM)
USN-4414-1 (UBUNTU)
[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update (MLIST)
CVE: CVE-2020-25669
CVE: CVE-2020-25669
Id:
CVE-2020-25669
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25669
Comment
: A vulnerability was found in the Linux Kernel where the function sunkbd_reinit having been scheduled by sunkbd_interrupt before sunkbd being freed. Though the dangling pointer is set to NULL in sunkbd_disconnect, there is still an alias in sunkbd_reinit causing Use After Free.
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:
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:
416 (Use After Free)
References:
https://github.com/torvalds/linux/commit/77e70d351db7de07a46ac49b87a6c3c7a60fca7e (MISC)
[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security update (MLIST)
[oss-security] 20201120 Re: CVE-2020-25669: Linux Kernel use-after-free in sunkbd_reinit (MLIST)
[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security update (MLIST)
[oss-security] 20201105 CVE-2020-25669: Linux Kernel use-after-free in sunkbd_reinit (MLIST)
https://security.netapp.com/advisory/ntap-20210702-0006/ (CONFIRM)
https://www.openwall.com/lists/oss-security/2020/11/05/2%2C ()
https://www.openwall.com/lists/oss-security/2020/11/20/5%2C ()
CVE: CVE-2020-27777
CVE: CVE-2020-27777
Id:
CVE-2020-27777
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27777
Comment
: A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.
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:
6.7
Attack vector:
LOCAL
Attack complexity:
LOW
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:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE:
862 (Missing Authorization)
References:
https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?h=next&id=bd59380c5ba4147dcbaad3e582b55ccfd120b764 (MISC)
https://www.openwall.com/lists/oss-security/2020/11/23/2 (MISC)
https://www.openwall.com/lists/oss-security/2020/10/09/1 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1900844 (MISC)
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