SB2021111148 - Ubuntu update for linux-oem-5.10
Published: November 11, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Missing initialization of resource (CVE-ID: CVE-2021-3655)
The vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to missing initialization of resource in the Linux kernel when processing inbound SCTP packets. A remote attacker can send specially crafted SCTP packets to the system and force the kernel to read uninitialized memory.
2) Memory leak (CVE-ID: CVE-2021-3744)
The vulnerability allows a local user to perform DoS attack on the target system.
The vulnerability exists due memory leak in the ccp_run_aes_gcm_cmd() function in drivers/crypto/ccp/ccp-ops.c. A local user can force the application to leak memory and perform denial of service attack.
3) Use-after-free (CVE-ID: CVE-2021-3760)
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 stack. A local user can trigger use-after-free error to escalate privileges on the system.
4) Memory leak (CVE-ID: CVE-2021-3764)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak error in the ccp_run_aes_gcm_cmd() function in Linux kernel. A local user can trigger a memory leak error and perform a denial of service (DoS) attack.
5) Out-of-bounds write (CVE-ID: CVE-2021-41864)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing untrusted input. A local user can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.
6) Unchecked Return Value (CVE-ID: CVE-2021-43056)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to an arch/powerpc/kvm/book3s_hv_rmhandlers.S implementation error when handling SRR1 register values. A local user can perform a denial of service attack, when the host is running on Power8.
7) Improper Validation of Array Index (CVE-ID: CVE-2021-43389)
The vulnerability allows a local user to execute arbitrary code with elevated privileges.The vulnerability exists due to improper validation of array index in the ISDN CAPI implementation within detach_capi_ctr() function in drivers/isdn/capi/kcapi.c. A local user can send specially crafted data to the system and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.