SB2021081405 - openEuler update for kernel

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) NULL pointer dereference (CVE-ID: CVE-2021-3659)

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

The vulnerability exists due to a NULL pointer dereference error in the way the user closes the LR-WPAN connection within the IEEE 802.15.4 wireless networking subsystem. A local user can perform a denial of service (DoS) attack.

2) Out-of-bounds write (CVE-ID: CVE-2021-37576)

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

The vulnerability exists due to a boundary error in arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform. An attacker on KVM guest OS can cause host OS memory corruption via rtas_args.nargs and execute arbitrary code on the host OS.

3) 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.

4) Information disclosure (CVE-ID: CVE-2022-0850)

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

The vulnerability exists due to excessive data output in the copy_page_to_iter() function in iov_iter.c in Linux kernel. A local user can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1310