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OVAL Definitions
>
OVAL Definition Details
Id
oval:com.altx-soft.nix:def:141567
[Rus]
Version
1
Class
patch
ALTXid
339222
Language
English
Severity
High
Title
USN-4576-1 -- Linux kernel vulnerabilities
Description
Hador Manor discovered that the DCCP protocol implementation in the Linuxkernel improperly handled socket reuse, leading to a use-after-freevulnerability. A local attacker could use this to cause a denial of service(system crash) or possibly execute arbitrary code.
Family
unix
Platform
Linux Mint 19.x
Linux Mint 20.x
Ubuntu 18.04
Ubuntu 20.04
Product
linux
linux-aws
linux-aws-5.4
linux-azure
linux-azure-5.4
linux-gcp
linux-gcp-5.4
linux-hwe-5.4
linux-kvm
linux-oracle
linux-oracle-5.4
linux-raspi
linux-raspi-5.4
Reference
VENDOR: USN-4576-1
VENDOR: USN-4576-1
Id:
USN-4576-1
Reference:
https://ubuntu.com/security/notices/USN-4576-1
CVE: CVE-2020-16119
CVE: CVE-2020-16119
Id:
CVE-2020-16119
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16119
Comment
: Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.
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:
416 (Use After Free)
References:
https://launchpad.net/bugs/1883840 (UBUNTU)
https://ubuntu.com/USN-4580-1 (UBUNTU)
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695 (UBUNTU)
https://ubuntu.com/USN-4578-1 (UBUNTU)
https://ubuntu.com/USN-4579-1 (UBUNTU)
https://ubuntu.com/USN-4576-1 (UBUNTU)
https://ubuntu.com/USN-4577-1 (UBUNTU)
https://security.netapp.com/advisory/ntap-20210304-0006/ (CONFIRM)
DSA-4978 (DEBIAN)
[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)
https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/ ()
CVE: CVE-2020-14314
CVE: CVE-2020-14314
Id:
CVE-2020-14314
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14314
Comment
: A memory out-of-bounds read flaw was found in the Linux kernel before 5.9-rc2 with the ext3/ext4 file system, in the way it accesses a directory with broken indexing. This flaw allows a local user to crash the system if the directory exists. The highest threat from this vulnerability is to system availability.
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
CWE:
125 (Out-of-bounds Read)
References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5872331b3d91820e14716632ebb56b1399b34fe1 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14314 (CONFIRM)
[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update (MLIST)
USN-4576-1 (UBUNTU)
USN-4578-1 (UBUNTU)
USN-4579-1 (UBUNTU)
[debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update (MLIST)
[debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update (MLIST)
https://www.starwindsoftware.com/security/sw-20210325-0003/ (MISC)
https://lore.kernel.org/linux-ext4/f53e246b-647c-64bb-16ec-135383c70ad7%40redhat.com/T/#u ()
CVE: CVE-2020-14385
CVE: CVE-2020-14385
Id:
CVE-2020-14385
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-14385
Comment
: A flaw was found in the Linux kernel before 5.9-rc4. A failure of the file system metadata validator in XFS can cause an inode with a valid, user-creatable extended attribute to be flagged as corrupt. This can lead to the filesystem being shutdown, or otherwise rendered inaccessible until it is remounted, leading to a denial of service. The highest threat from this vulnerability is to system availability.
CVSSv2 Score:
4.7
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:N/I:N/A:C
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
CWE:
131 (Incorrect Calculation of Buffer Size)
References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f4020438fab05364018c91f7e02ebdd192085933 (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14385 (CONFIRM)
[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update (MLIST)
openSUSE-SU-2020:1586 (SUSE)
USN-4576-1 (UBUNTU)
CVE: CVE-2020-16120
CVE: CVE-2020-16120
Id:
CVE-2020-16120
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-16120
Comment
: Overlayfs did not properly perform permission checking when copying up files in an overlayfs and could be exploited from within a user namespace, if, for example, unprivileged user namespaces were allowed. It was possible to have a file not readable by an unprivileged user to be copied to a mountpoint controlled by the user, like a removable device. This was introduced in kernel version 4.19 by commit d1d04ef ("ovl: stack file ops"). This was fixed in kernel version 5.8 by commits 56230d9 ("ovl: verify permissions in ovl_path_open()"), 48bd024 ("ovl: switch to mounter creds in readdir") and 05acefb ("ovl: check permission to open real file"). Additionally, commits 130fdbc ("ovl: pass correct flags for opening real directory") and 292f902 ("ovl: call secutiry hook in ovl_real_ioctl()") in kernel 5.8 might also be desired or necessary. These additional commits introduced a regression in overlay mounts within user namespaces which prevented access to files with ownership outside of the user namespace. This regression was mitigated by subsequent commit b6650da ("ovl: do not fail because of O_NOATIMEi") in kernel 5.11.
CVSSv2 Score:
2.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSSv3 Score:
4.4
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
HIGH
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CWE:
CWE-Other ()
References:
https://git.kernel.org/linus/b6650dab404c701d7fe08a108b746542a934da84 (CONFIRM)
https://launchpad.net/bugs/1894980 (UBUNTU)
https://ubuntu.com/USN-4578-1 (UBUNTU)
https://www.openwall.com/lists/oss-security/2020/10/14/2 (CONFIRM)
https://launchpad.net/bugs/1900141 (UBUNTU)
https://ubuntu.com/USN-4576-1 (UBUNTU)
https://git.kernel.org/linus/56230d956739b9cb1cbde439d76227d77979a04d (CONFIRM)
https://git.kernel.org/linus/d1d04ef8572bc8c22265057bd3d5a79f223f8f52 (CONFIRM)
https://ubuntu.com/USN-4577-1 (UBUNTU)
https://git.kernel.org/linus/48bd024b8a40d73ad6b086de2615738da0c7004f (CONFIRM)
https://git.kernel.org/linus/05acefb4872dae89e772729efb194af754c877e8 (CONFIRM)
CVE: CVE-2020-25285
CVE: CVE-2020-25285
Id:
CVE-2020-25285
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25285
Comment
: A race condition between hugetlb sysctl handlers in mm/hugetlb.c in the Linux kernel before 5.8.8 could be used by local attackers to corrupt memory, cause a NULL pointer dereference, or possibly have unspecified other impact, aka CID-17743798d812.
CVSSv2 Score:
4.4
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:P/I:P/A:P
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://twitter.com/grsecurity/status/1303749848898904067 (MISC)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17743798d81238ab13050e8e2833699b54e15467 (MISC)
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.8 (MISC)
[debian-lts-announce] 20200928 [SECURITY] [DLA 2385-1] linux-4.19 security update (MLIST)
https://security.netapp.com/advisory/ntap-20201009-0002/ (CONFIRM)
USN-4576-1 (UBUNTU)
USN-4579-1 (UBUNTU)
[debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update (MLIST)
[debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update (MLIST)
CVE: CVE-2020-25641
CVE: CVE-2020-25641
Id:
CVE-2020-25641
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25641
Comment
: A flaw was found in the Linux kernel's implementation of biovecs in versions before 5.9-rc7. A zero-length biovec request issued by the block subsystem could cause the kernel to enter an infinite loop, causing a denial of service. This flaw allows a local attacker with basic privileges to issue requests to a block device, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
CVSSv2 Score:
4.9
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
NONE
Integrity impact:
NONE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:N/I:N/A:C
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
CWE:
835 (Loop with Unreachable Exit Condition ('Infinite Loop'))
References:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7e24969022cbd61ddc586f14824fc205661bb124 (MISC)
https://www.kernel.org/doc/html/latest/block/biovecs.html (MISC)
https://bugzilla.redhat.com/show_bug.cgi?id=1881424 (MISC)
[oss-security] 20201006 Re: CVE-2020-25641 kernel: soft lockup when submitting zero length bvecs. (MLIST)
openSUSE-SU-2020:1655 (SUSE)
USN-4576-1 (UBUNTU)
openSUSE-SU-2020:1698 (SUSE)
[debian-lts-announce] 20201031 [SECURITY] [DLA 2420-2] linux regression update (MLIST)
[debian-lts-announce] 20201030 [SECURITY] [DLA 2420-1] linux security update (MLIST)
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