SB2021060861 - Ubuntu update for linux
Published: June 8, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 13 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2020-25670)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the NFC LLCP protocol implementation. A local user can perform manipulation with an unknown input for the llcp_sock_bind() function to crash or escalate their privileges on the system.
2) Use-after-free (CVE-ID: CVE-2020-25671)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the NFC LLCP protocol implementation. A local user can trigger the llcp_sock_connect() function to crash or escalate their privileges on the system.
3) Memory leak (CVE-ID: CVE-2020-25672)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in the NFC LLCP protocol implementation when triggering the llcp_sock_connect() function. A remote attacker can force the application to leak memory and perform denial of service attack.
4) Resource exhaustion (CVE-ID: CVE-2020-25673)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper control consumption of internal resources in non-blocking socket in llcp_sock_connect() function. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.
5) Improper Initialization (CVE-ID: CVE-2021-28688)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to improper initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. A local user can perform a denial of service attack.
6) Excessive Iteration (CVE-ID: CVE-2021-28950)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to excessive iteration in fs/fuse/fuse_i.h in the Linux kernel. A local user can run a specially crafted program to perform a denial of service attack.
7) Race condition (CVE-ID: CVE-2021-28964)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a race condition in the get_old_root() function in fs/btrfs/ctree.c component in the Linux kernel. A local user can exploit the race and perform a denial of service attack.
8) Resource exhaustion (CVE-ID: CVE-2021-28971)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to mishandling of PEBS status in a PEBS record In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.
9) Buffer overflow (CVE-ID: CVE-2021-28972)
The vulnerability allows a local user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the drivers/pci/hotplug/rpadlpar_sysfs.c. A local administrator can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
10) Input validation error (CVE-ID: CVE-2021-29264)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the gfar_add_rx_frag() and gfar_clean_rx_ring() functions in drivers/net/ethernet/freescale/gianfar.c. A local user can perform a denial of service (DoS) attack.
11) Information disclosure (CVE-ID: CVE-2021-29647)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to an error in qrtr_recvmsg(0 function in net/qrtr/qrtr.c caused by a partially uninitialized data structure. A local user can read sensitive information from kernel memory.
12) Out-of-bounds write (CVE-ID: CVE-2021-31916)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module. A special user (CAP_SYS_ADMIN) can trigger a buffer overflow in the ioctl for listing devices and escalate privileges on the system.
13) Use-after-free (CVE-ID: CVE-2021-3483)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the Nosy driver in the Linux kernel. A local user can trigger use-after-free and to escalate privileges on the system.
Remediation
Install update from vendor's website.