SB2022031401 - Debian update for linux

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Infinite loop (CVE-ID: CVE-2020-36310)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in set_memory_region_test in arch/x86/kvm/svm/svm.c. A local user can consume all available system resources and cause denial of service conditions.

2) Information disclosure (CVE-ID: CVE-2022-0001)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to non-transparent sharing of branch predictor selectors between contexts. A local user can gain unauthorized access to sensitive information on the system.

3) Information disclosure (CVE-ID: CVE-2022-0002)

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to non-transparent sharing of branch predictor within a context. A local user can gain unauthorized access to sensitive information on the system.

4) Use-after-free (CVE-ID: CVE-2022-0487)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a use-after-free error in rtsx_usb_ms_drv_remove in drivers/memstick/host/rtsx_usb_ms.c in memstick in the Linux kernel. A local user can trigger a use-after-free error and gain access to sensitive information.

5) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-0492)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a logic error within the cgroup_release_agent_write() function in  kernel/cgroup/cgroup-v1.c. A local user can use the cgroups v1 release_agent feature to escalate privileges and bypass the namespace isolation.

6) NULL pointer dereference (CVE-ID: CVE-2022-0617)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in the Linux kernel UDF file system functionality. A local user can supply a malicious UDF image to the udf_file_write_iter() function and perform a denial of service (DoS) attack.

7) Heap-based buffer overflow (CVE-ID: CVE-2022-25636)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in net/netfilter/nf_dup_netdev.c in the Linux kernel, related to nf_tables_offload. A local user can trigger a heap-based buffer overflow and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://www.debian.org/security/2022/dsa-5095