PT-2021-2458 · Linux+5 · Linux Kernel+5

Michael Braun · Published 2021-03-05 · Updated 2023-05-17 · CVE-2021-29264

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions through 5.11.10

Description An issue in the Freescale Gianfar Ethernet driver allows attackers to cause a system crash due to a negative fragment size calculation when jumbo packets are used and NAPI is enabled, particularly in situations involving an rx queue overrun. The vulnerability is related to incorrect buffer size calculation.

Recommendations For Linux kernel versions through 5.11.10, consider disabling the use of jumbo packets or NAPI to minimize the risk of exploitation until a patch is available. Restrict access to the Freescale Gianfar Ethernet driver to prevent potential system crashes. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

CWE-682

Related Identifiers

ALT-PU-2021-1582

ALT-PU-2021-1609

ALT-PU-2021-1869

ALT-PU-2021-1888

ALT-PU-2021-1896

ALT-PU-2022-1240

ALT-PU-2022-1419

ALT-PU-2022-1421

ALT-PU-2023-1814

AZL-6546

BDU:2021-01824

CVE-2021-29264

DLA-2690-1

DLA-2940-1

OESA-2021-1176

OPENSUSE-SU-2021:0532-1

OPENSUSE-SU-2021:0758-1

OPENSUSE-SU-2021:1975-1

OPENSUSE-SU-2021:1977-1

OPENSUSE-SU-2021_0532-1

OPENSUSE-SU-2021_0758-1

OPENSUSE-SU-2021_1975-1

OPENSUSE-SU-2021_1977-1

SUSE-SU-2021:1175-1

SUSE-SU-2021:1176-1

SUSE-SU-2021:1177-1

SUSE-SU-2021:1210-1

SUSE-SU-2021:1211-1

SUSE-SU-2021:1238-1

SUSE-SU-2021:1573-1

SUSE-SU-2021:1596-1

SUSE-SU-2021:1617-1

SUSE-SU-2021:1623-1

SUSE-SU-2021:1624-1

SUSE-SU-2021:1625-1

SUSE-SU-2021:1975-1

SUSE-SU-2021:1977-1

USN-4946-1

USN-4948-1

USN-4949-1

USN-4982-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Linux Kernel

Suse

Ubuntu

References · 660

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/netfilter_xtables_heap_oob_write_priv_esc.rb · Exploit
• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/docker_cgroup_escape.rb · Exploit
• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2022_0847_dirtypipe.rb · Exploit
• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/cve_2021_3490_ebpf_alu32_bounds_check_lpe.rb · Exploit
• 🔥 https://github.com/Arinerron/CVE-2022-0847-DirtyPipe-Exploit · Exploit
• 🔥 https://github.com/AlexisAhmed/CVE-2022-0847-DirtyPipe-Exploits · Exploit
• 🔥 https://github.com/tr3ee/CVE-2022-23222 · Exploit
• 🔥 https://github.com/Crusaders-of-Rust/CVE-2022-0185 · Exploit
• 🔥 https://github.com/chompie1337/Linux_LPE_eBPF_CVE-2021-3490 · Exploit
• 🔥 https://github.com/r1is/CVE-2022-0847 · Exploit
• 🔥 https://github.com/imfiver/CVE-2022-0847 · Exploit
• 🔥 https://github.com/plummm/CVE-2022-27666 · Exploit
• 🔥 https://github.com/pqlx/CVE-2022-1015 · Exploit
• 🔥 https://github.com/nrb547/kernel-exploitation/blob/main/cve-2021-3609/cve-2021-3609.md · Exploit
• 🔥 https://github.com/Al1ex/CVE-2022-0847 · Exploit