CVE-2022-0847

CVE Published	2022-03-10
Related CWE(s)	CWE-665: Improper Initialization
Related Vendor(s)	fedoraproject, redhat, sonicwall, linux, siemens, ovirt, netapp
Related Product(s)	h300e_firmware, scalance_lpe9403_firmware, h410c_firmware, fedora, h300s_firmware, ovirt-engine, codeready_linux_builder, h700s_firmware, enterprise_linux, enterprise_linux_for_real_time_for_nfv_tus, sma1000_firmware, enterprise_linux_for_real_time_tus, enterprise_linux_for_real_time_for_nfv, enterprise_linux_server_update_services_for_sap_solutions, virtualization_host, enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions, h700e_firmware, h410s_firmware, enterprise_linux_eus, h500s_firmware, enterprise_linux_for_power_little_endian_eus, h500e_firmware, enterprise_linux_server_aus, enterprise_linux_for_ibm_z_systems, enterprise_linux_for_power_little_endian, enterprise_linux_for_ibm_z_systems_eus, linux_kernel, enterprise_linux_for_real_time, enterprise_linux_server_tus
Exploitation Reported (CISA KEV)	2022-04-25
CVSS 3 Base Score	7.8 (HIGH)
CVSS 3 Attack Complexity	LOW
CVSS 3 Attack Vector	LOCAL

A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system.

Cyber Threat Graph Context

Explore how this CVE relates to the wider threat graph

Associated CAPEC Patterns

Leveraging Race Conditions (CAPEC-26)

The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with their version and cause the system to read the malicious file.

Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (CAPEC-29)

This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.

References

CVE-2022-0847

Cyber Threat Graph Context

Associated CAPEC Patterns

Leveraging Race Conditions (CAPEC-26)

Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions (CAPEC-29)

References

CVE.org

NIST National Vulnerability Database

CISA Known Exploited Vulnerabilities