CVE-2021-22555

Published on: 07/07/2021 12:00:00 AM UTC

Last Modified on: 09/14/2021 06:15:00 PM UTC

CVE-2021-22555

Source: Mitre Source: Nist Print: PDF PDF
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Certain versions of Linux Kernel from Linux contain the following vulnerability:

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

  • CVE-2021-22555 has been assigned by URL Logo [email protected] to track the vulnerability - currently rated as HIGH severity.

CVSS3 Score: 7.8 - HIGH

Attack
Vector ⓘ		 Attack
Complexity		 Privileges
Required		 User
Interaction
LOCAL LOW LOW NONE
Scope Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
UNCHANGED HIGH HIGH HIGH

CVSS2 Score: 4.6 - MEDIUM

Access
Vector ⓘ		 Access
Complexity		 Authentication
LOCAL LOW NONE
Confidentiality
Impact		 Integrity
Impact		 Availability
Impact
PARTIAL PARTIAL PARTIAL

CVE References

Description Tags ⓘ Link
Kernel Live Patch Security Notice LSN-0080-1 ≈ Packet Storm packetstormsecurity.com
text/html
 URL Logo MISC packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html
kernel/git/torvalds/linux.git - Linux kernel source tree git.kernel.org
text/html
 URL Logo MISC git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d
CVE-2021-22555 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security security.netapp.com
text/html
 URL Logo CONFIRM security.netapp.com/advisory/ntap-20210805-0010/
Kernel Live Patch Security Notice LSN-0081-1 ≈ Packet Storm packetstormsecurity.com
text/html
 URL Logo MISC packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html
Linux Kernel Netfilter Heap Out-Of-Bounds Write ≈ Packet Storm packetstormsecurity.com
text/html
 URL Logo MISC packetstormsecurity.com/files/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html
github.com
text/plain
Inactive LinkNot Archived
 URL Logo MISC github.com/google/security-research/security/advisories/GHSA-xxx5-8mvq-3528
kernel/git/torvalds/linux.git - Linux kernel source tree git.kernel.org
text/html
 URL Logo MISC git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=9fa492cdc160cd27ce1046cb36f47d3b2b1efa21
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Related QID Numbers

  • 159329 Oracle Enterprise Linux Security Update for kernel (ELSA-2021-3057)
  • 159332 Oracle Enterprise Linux Security Update for Unbreakable Enterprise kernel (ELSA-2021-9395)
  • 159375 Oracle Enterprise Linux Security Update for kernel (ELSA-2021-3327)
  • 239541 Red Hat Update for kernel (RHSA-2021:3057)
  • 239542 Red Hat Update for kpatch-patch (RHSA-2021:3044)
  • 239543 Red Hat Update for kernel-rt (RHSA-2021:3088)
  • 239566 Red Hat Update for kpatch-patch (RHSA-2021:3181)
  • 239570 Red Hat Update for kernel (RHSA-2021:3173)
  • 239592 Red Hat Update for kpatch-patch (RHSA-2021:3381)
  • 239593 Red Hat Update for kpatch-patch (RHSA-2021:3380)
  • 239594 Red Hat Update for kernel-rt (RHSA-2021:3375)
  • 239599 Red Hat Update for kernel (RHSA-2021:3363)
  • 239602 Red Hat Update for kernel-rt (RHSA-2021:3328)
  • 239603 Red Hat Update for kernel (RHSA-2021:3327)
  • 257109 CentOS Security Update for kernel (CESA-2021:3327)
  • 352831 Amazon Linux Security Advisory for kernel: ALAC2012-2021-030
  • 352832 Amazon Linux Security Advisory for kmod-sfc: ALAC2012-2021-031
  • 352833 Amazon Linux Security Advisory for kmod-mlx5: ALAC2012-2021-032
  • 750844 SUSE Enterprise Linux Security Update for kernel (SUSE-SU-2021:2407-1)
  • 750847 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:2409-1)
  • 750848 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:2416-1)(Sequoia)
  • 750851 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:2415-1)(Sequoia)
  • 750864 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:2421-1)
  • 750868 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:2427-1)
  • 750869 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:2422-1)
  • 750877 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:2427-1)
  • 750880 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2021:2451-1)
  • 750887 OpenSUSE Security Update for the Linux Kernel (openSUSE-SU-2021:1076-1)
  • 750899 SUSE Enterprise Linux Security Update for the Linux Kernel (Live Patch 36 for SLE 12 SP3) (SUSE-SU-2021:2538-1)

Known Affected Configurations (CPE V2.3)

Type Vendor Product Version Update Edition Language
Operating
System		LinuxLinux KernelAllAllAllAll
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*:

Discovery Credit

Andy Nguyen

Social Mentions

Source Title Posted (UTC)
Reddit Logo Icon /r/netcve CVE-2021-22555 2021-07-07 20:43:10
Reddit Logo Icon /r/lowlevel CVE-2021-22555: Turning \x00\x00 into 10000$ 2021-07-14 21:18:36
Reddit Logo Icon /r/linuxadmin CVE-2021-22555: Turning \x00\x00 into 10000$ - a 15 years old heap out-of-bounds write vulnerability in Linux Netfilter that is powerful enough to bypass all modern security mitigations and achieve kernel code execution. 2021-07-15 08:16:33
Reddit Logo Icon /r/hackernews CVE-2021-22555: Turning \x00\x00 into 10000$ 2021-07-15 11:00:02
Reddit Logo Icon /r/programming CVE-2021-22555: Turning \x00\x00 into 10000$ 2021-07-15 11:20:00
Reddit Logo Icon /r/hackerdigest Hacker News top posts: Jul 15, 2021 2021-07-15 13:32:40
Reddit Logo Icon /r/cybersecurity CVE-2021-22555: Turning \x00\x00 into 10000$ 2021-07-15 13:04:34
Reddit Logo Icon /r/devopsish CVE-2021-22555: Turning \x00\x00 into 10000$ 2021-07-16 02:25:48
Reddit Logo Icon /r/linuxquestions cve-2021-22555 vulnerability mitigation suggestions 2021-07-21 05:50:57
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