| Description: | Summary:
The remote host is missing an update for the Debian 'linux-4.19' package(s) announced via the DLA-2610-1 advisory.
Vulnerability Insight:
CVE-2021-26930 CVE-2021-26931 CVE-2021-26932 CVE-2021-27363 CVE-2021-27364 CVE-2021-27365 CVE-2021-28038 CVE-2021-28660 Debian Bug : 983595
Several vulnerabilities have been discovered in the Linux kernel that may lead to the execution of arbitrary code, privilege escalation, denial of service, or information leaks.
CVE-2020-27170
, CVE-2020-27171
Piotr Krysiuk discovered flaws in the BPF subsystem's checks for information leaks through speculative execution. A local user could use these to obtain sensitive information from kernel memory.
CVE-2021-3348
ADlab of venustech discovered a race condition in the nbd block driver that can lead to a use-after-free. A local user with access to an nbd block device could use this to cause a denial of service (crash or memory corruption) or possibly for privilege escalation.
CVE-2021-3428
Wolfgang Frisch reported a potential integer overflow in the ext4 filesystem driver. A user permitted to mount arbitrary filesystem images could use this to cause a denial of service (crash).
CVE-2021-26930
(XSA-365)
Olivier Benjamin, Norbert Manthey, Martin Mazein, and Jan H. Schonherr discovered that the Xen block backend driver (xen-blkback) did not handle grant mapping errors correctly. A malicious guest could exploit this bug to cause a denial of service (crash), or possibly an information leak or privilege escalation, within the domain running the backend, which is typically dom0.
CVE-2021-26931
(XSA-362), CVE-2021-26932 (XSA-361), CVE-2021-28038 (XSA-367)
Jan Beulich discovered that the Xen support code and various Xen backend drivers did not handle grant mapping errors correctly. A malicious guest could exploit these bugs to cause a denial of service (crash) within the domain running the backend, which is typically dom0.
CVE-2021-27363
Adam Nichols reported that the iSCSI initiator subsystem did not properly restrict access to transport handle attributes in sysfs. On a system acting as an iSCSI initiator, this is an information leak to local users and makes it easier to exploit CVE-2021-27364.
CVE-2021-27364
Adam Nichols reported that the iSCSI initiator subsystem did not properly restrict access to its netlink management interface. On a system acting as an iSCSI initiator, a local user could use these to cause a denial of service (disconnection of storage) or possibly for privilege escalation.
CVE-2021-27365
Adam Nichols reported that the iSCSI initiator subsystem did not correctly limit the lengths of parameters or passthrough PDUs sent through its netlink management interface. On a system acting as an iSCSI initiator, a local user could use these to leak the contents of kernel memory, to cause a denial of service (kernel memory corruption or crash), and probably for privilege escalation.
CVE-2021-28660
It was discovered that the rtl8188eu WiFi driver did not correctly limit the length of SSIDs copied into scan ... [Please see the references for more information on the vulnerabilities]
Affected Software/OS:
'linux-4.19' package(s) on Debian 9.
Solution:
Please install the updated package(s).
CVSS Score:
8.3
CVSS Vector:
AV:A/AC:L/Au:N/C:C/I:C/A:C
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