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Vulnerability Details : CVE-2021-22555

A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space
Publish Date : 2021-07-07 Last Update Date : 2022-03-31
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- CVSS Scores & Vulnerability Types

CVSS Score
4.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Gain privilegesMemory corruption
CWE ID 787

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:3044: kpatch-patch security update (Important) oval:com.redhat.rhsa:def:20213044 unix
RHSA-2021:3057: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20213057 unix
RHSA-2021:3088: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20213088 unix
RHSA-2021:3327: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20213327 unix
RHSA-2021:3328: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20213328 unix
RHSA-2021:3381: kpatch-patch security update (Important) oval:com.redhat.rhsa:def:20213381 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-22555

# Product Type Vendor Product Version Update Edition Language
1 OS Brocade Fabric Operating System - * * * Version Details Vulnerabilities
2 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
3 Application Netapp Hci Management Node - * * * Version Details Vulnerabilities
4 Application Netapp Solidfire - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Brocade Fabric Operating System 1
Linux Linux Kernel 1
Netapp Hci Management Node 1
Netapp Solidfire 1

- References For CVE-2021-22555

http://packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html
https://github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
http://packetstormsecurity.com/files/164437/Netfilter-x_tables-Heap-Out-Of-Bounds-Write-Privilege-Escalation.html
https://security.netapp.com/advisory/ntap-20210805-0010/ CONFIRM
http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2021-22555

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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