SB20220111103 - Ubuntu update for linux-oem-5.13
Published: January 11, 2022
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2021-4002)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due memory leak in the Linux kernel's hugetlbfs memory usage. A local user can force the application to leak memory and gain access to sensitive information.
2) Out-of-bounds read (CVE-ID: CVE-2021-4204)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a boundary condition in Linux kernel eBPF. A local user trigger an out-of-bounds read error and read contents of memory on the system or crash the kernel.
3) Race condition (CVE-ID: CVE-2021-20321)
The vulnerability allows a local user to perform a denial of service (DoS) attacks.
The vulnerability exists due to a race condition when accessing file object in the Linux kernel OverlayFS subsystem. A local user can rename files in specific way with OverlayFS and perform a denial of service (DoS) attack.
4) 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.
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) Buffer overflow (CVE-ID: CVE-2021-43267)
The vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input in net/tipc/crypto.c in the Linux kernel. The Transparent Inter-Process Communication (TIPC) functionality allows remote attackers to exploit insufficient validation of user-supplied sizes for the MSG_CRYPTO message type.
A remote attacker can send specially crafted MSG_CRYPTO messages to the affected system, trigger memory corruption and execute arbitrary code on the system.
8) 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.