SB2021060862 - 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) Allocation of resources without limits or throttling (CVE-ID: CVE-2021-28038)
The vulnerability allows a local user to a crash the entire system.
The vulnerability exists due to allocation of resources without limits or throttling error within the xenvif_tx_action() function in drivers/net/xen-netback/netback.c. A local user can a crash the entire system.
2) Out-of-bounds write (CVE-ID: CVE-2021-28660)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in the "rtw_wx_set_scan" in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c. A local user can trigger out-of-bounds write and execute arbitrary code on the target system.
3) 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.
4) 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.
5) Buffer overflow (CVE-ID: CVE-2021-28952)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the sound/soc/qcom/sdm845.c soundwire device driver in Linux kernel. A local user can run a specially crafted program to trigger a buffer overflow, when an unexpected port ID number is encountered, and execute arbitrary code on the system with elevated privileges.
6) 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.
7) 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.
8) 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.
9) 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.
10) Memory leak (CVE-ID: CVE-2021-30002)
The vulnerability allows a local user to perform DoS attack on the target system.
The vulnerability exists due memory leak within the webcam support driver in video_usercopy() function in drivers/media/v4l2-core/v4l2-ioctl.c in Linux kernel. A local user can trigger leak memory and perform denial of service attack.
11) 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.
12) Use-after-free (CVE-ID: CVE-2021-33033)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper handling of the CIPSO and CALIPSO refcounting for the DOI definitions in cipso_v4_genopt(0 function in net/ipv4/cipso_ipv4.c in Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with escalated privileges.
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.