PT-2020-6721 · Linux+7 · Linux Kernel+7

Rohit Keshri · Published 2020-06-29 · Updated 2023-04-12 · CVE-2021-3428

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 (affected versions not specified)

Description A flaw was found in the Linux kernel, specifically in the ext4 filesystem, where a corrupted extent tree can cause a denial of service problem. This issue is related to an integer overflow in the ext4 es cache extent function in fs/ext4/extents.c. A local attacker with special user privileges can exploit this issue by fabricating an integer overflow, potentially leading to a system crash and an availability threat.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2020-3058

ALT-PU-2020-3211

ALT-PU-2020-3553

ALT-PU-2020-3570

ALT-PU-2021-1083

ALT-PU-2021-1105

ALT-PU-2021-1621

ALT-PU-2021-1656

ALT-PU-2021-1739

ALT-PU-2021-1862

ALT-PU-2021-1866

ALT-PU-2021-1870

BDU:2022-05774

CESA-2021_1578

CESA-2021_1739

CVE-2021-3428

DLA-2610-1

DLA-2689-1

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

RHSA-2021:1578

RHSA-2021:1739

RHSA-2021_1578

RHSA-2021_1739

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-2021:1624-1

SUSE-SU-2021:1625-1

SUSE-SU-2021:1975-1

SUSE-SU-2021:1977-1

USN-4979-1

USN-5137-1

USN-5137-2

USN-6001-1

USN-6013-1

USN-6014-1

Affected Products

Alt Linux

Astra Linux

Centos

Linuxmint

Linux Kernel

Red Hat

Suse

Ubuntu

References · 603

• 🔥 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/cve_2021_3490_ebpf_alu32_bounds_check_lpe.rb · Exploit
• 🔥 https://github.com/Bonfee/CVE-2022-25636 · Exploit
• 🔥 https://github.com/chompie1337/Linux_LPE_eBPF_CVE-2021-3490 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19037 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19449 · Exploit
• 🔥 https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19036 · Exploit
• 🔥 https://github.com/tr3ee/CVE-2021-4204 · Exploit
• 🔥 https://github.com/cgwalters/cve-2020-14386 · Exploit
• 🔥 https://github.com/veritas501/CVE-2021-22555-PipeVersion · Exploit
• 🔥 https://github.com/xyjl-ly/CVE-2021-22555-Exploit · Exploit
• 🔥 https://github.com/veritas501/CVE-2022-25636-PipeVersion · Exploit
• 🔥 https://github.com/xmzyshypnc/CVE-2020-27194 · Exploit
• 🔥 https://github.com/kiks7/CVE-2020-27786-Kernel-Exploit · Exploit