SB2022091632 - openEuler 20.03 LTS SP3 update for kernel

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Heap-based buffer overflow (CVE-ID: CVE-2022-2991)

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

The vulnerability exists due to a boundary error within the LightNVM subsystem in Linux kernel. A local user can execute arbitrary code on the system with kernel privileges.

2) Use-after-free (CVE-ID: CVE-2020-27784)

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

The vulnerability exists due to a use-after-free error when accessing a deallocated instance in printer_ioctl(). A local user can trigger a use-after-free error and crash the kernel.

3) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2022-39189)

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

The vulnerability exists due to incorrect handling of TLB flush operations in certain KVM_VCPU_PREEMPTED situations in the x86 KVM subsystem in the Linux kernel. An attacker with unprivileged access to the guest OS can escalate privileges on the guest.

4) Division by zero (CVE-ID: CVE-2022-3061)

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

The vulnerability exists due to missing checks of the "pixclock" value in the Linux kernel i740 driver. A local user can pass arbitrary values to the driver through ioctl() interface, trigger a divide by zero error and perform a denial of service (DoS) attack.

5) Input validation error (CVE-ID: CVE-2022-2663)

The vulnerability allows a remote attacker to bypass firewall rules.

The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.

6) Integer overflow (CVE-ID: CVE-2022-39842)

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

The vulnerability exists due to integer overflow within the pxa3xx_gcu_write() function in drivers/video/fbdev/pxa3xx-gcu.c in Linux kernel. A local user can trigger an integer overflow and execute arbitrary code with escalated privileges.

7) Race condition (CVE-ID: CVE-2022-39188)

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

The vulnerability exists due to a race condition within include/asm-generic/tlb.h in the Linux kernel. A local user can exploit the race and escalate privileges on the system.

Note, this only occurs in situations with VM_PFNMAP VMAs.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2022-1926