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Rewterz Threat Advisory – Linux Kernel Multiple Security Vulnerabilities

Severity

Medium

Analysis Summary

CVE-2021-33624

Linux Kernel could allow an attacker to obtain sensitive information, caused by a flaw in the BPF protection against speculative execution attacks. By executing a specially-crafted BPF program, an attacker could exploit this vulnerability to obtain contents of arbitrary kernel memory information, and use this information to launch further attacks against the affected system.

CVE-2021-3609

Linux Kernel could allow an authenticated attacker to gain elevated privileges on the system, caused by a race condition in net/can/bcm.c. By sending a specially-crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges as root.

Impact

  • Information Theft
  • Elevated Privileges
  • Unauthorized Access

Affected Vendors

Linux

Affected Products

  • Linux Kernel 2.6.25
  • Linux Kernel 2.6.26
  • Linux Kernel 2.6.27
  • Linux Kernel 2.6.28

Remediation

Refer to Linux Kernel GIT Repository for patch, upgrade or suggested workaround information.

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/?id=d203b0fd863a2261e5d00b97f3d060c4c2a6db71