CVE-2021-22555

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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

References

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/net/netfilter/x_tables.c?id=b29c457a6511435960115c0f548c4360d5f4801d

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/163528/Linux-Kernel-Netfilter-Heap-Out-Of-Bounds-Write.html

https://security.netapp.com/advisory/ntap-20210805-0010/

http://packetstormsecurity.com/files/163878/Kernel-Live-Patch-Security-Notice-LSN-0080-1.html

http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html

Details

Source: MITRE

Published: 2021-07-07

Updated: 2021-09-14

Type: CWE-787

Risk Information

CVSS v2

Base Score: 4.6

Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (49 total)

IDNameProductFamilySeverity
153371RHEL 7 : kernel (RHSA-2021:3522)NessusRed Hat Local Security Checks
high
153370RHEL 7 : kpatch-patch (RHSA-2021:3523)NessusRed Hat Local Security Checks
high
152978Oracle Linux 7 : kernel (ELSA-2021-3327)NessusOracle Linux Local Security Checks
high
152977RHEL 7 : kernel (RHSA-2021:3399)NessusRed Hat Local Security Checks
high
152970CentOS 7 : kernel (CESA-2021:3327)NessusCentOS Local Security Checks
high
152964RHEL 7 : kernel (RHSA-2021:3321)NessusRed Hat Local Security Checks
high
152950Scientific Linux Security Update : kernel on SL7.x x86_64 (2021:3327)NessusScientific Linux Local Security Checks
high
152940RHEL 8 : kpatch-patch (RHSA-2021:3380)NessusRed Hat Local Security Checks
high
152935RHEL 7 : kernel (RHSA-2021:3327)NessusRed Hat Local Security Checks
high
152931RHEL 8 : kernel-rt (RHSA-2021:3375)NessusRed Hat Local Security Checks
high
152929RHEL 7 : kpatch-patch (RHSA-2021:3381)NessusRed Hat Local Security Checks
high
152925RHEL 8 : kernel (RHSA-2021:3363)NessusRed Hat Local Security Checks
high
152924RHEL 7 : kernel-rt (RHSA-2021:3328)NessusRed Hat Local Security Checks
high
152688RHEL 8 : Red Hat Virtualization Host security and bug fix update [ovirt-4.4.7] (Important) (RHSA-2021:3235)NessusRed Hat Local Security Checks
high
152619RHEL 8 : kpatch-patch (RHSA-2021:3181)NessusRed Hat Local Security Checks
high
152613RHEL 8 : kernel (RHSA-2021:3173)NessusRed Hat Local Security Checks
high
152596CentOS 8 : kernel (CESA-2021:3057)NessusCentOS Local Security Checks
high
152536Ubuntu 16.04 LTS : Linux kernel vulnerability (USN-5039-1)NessusUbuntu Local Security Checks
high
152493Oracle Linux 8 : kernel (ELSA-2021-3057)NessusOracle Linux Local Security Checks
high
152481SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2643-1)NessusSuSE Local Security Checks
high
152444RHEL 8 : kpatch-patch (RHSA-2021:3044)NessusRed Hat Local Security Checks
high
152441RHEL 8 : kernel-rt (RHSA-2021:3088)NessusRed Hat Local Security Checks
high
152438RHEL 8 : kernel (RHSA-2021:3057)NessusRed Hat Local Security Checks
high
152398OracleVM 3.4 : Unbreakable / etc (OVMSA-2021-0025)NessusOracleVM Local Security Checks
high
152200SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2599-1)NessusSuSE Local Security Checks
high
152195Oracle Linux 6 / 7 : Unbreakable Enterprise kernel (ELSA-2021-9395)NessusOracle Linux Local Security Checks
high
152188SUSE SLES12 / SLES15 Security Update : kernel (Live Patch 18 for SLE 12 SP4) (SUSE-SU-2021:2584-1)NessusSuSE Local Security Checks
high
152167SUSE SLES15 Security Update : kernel (Live Patch 15 for SLE 15 SP2) (SUSE-SU-2021:2577-1)NessusSuSE Local Security Checks
high
152160SUSE SLES15 Security Update : kernel (Live Patch 2 for SLE 15 SP3) (SUSE-SU-2021:2559-1)NessusSuSE Local Security Checks
high
152159SUSE SLES15 Security Update : kernel (Live Patch 22 for SLE 15 SP1) (SUSE-SU-2021:2560-1)NessusSuSE Local Security Checks
high
152142SUSE SLES15 Security Update : kernel (Live Patch 21 for SLE 15 SP1) (SUSE-SU-2021:2542-1)NessusSuSE Local Security Checks
high
152116SUSE SLES15 Security Update : kernel (Live Patch 14 for SLE 15 SP2) (SUSE-SU-2021:2538-1)NessusSuSE Local Security Checks
high
152108SUSE SLES15 Security Update : kernel (Live Patch 16 for SLE 15 SP2) (SUSE-SU-2021:2487-1)NessusSuSE Local Security Checks
high
152055SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2451-1)NessusSuSE Local Security Checks
high
152017openSUSE 15 Security Update : kernel (openSUSE-SU-2021:1076-1)NessusSuSE Local Security Checks
high
151998SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2422-1)NessusSuSE Local Security Checks
high
151997SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:2438-1)NessusSuSE Local Security Checks
high
151989SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2427-1)NessusSuSE Local Security Checks
high
151986SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2421-1)NessusSuSE Local Security Checks
high
151935openSUSE 15 Security Update : kernel (openSUSE-SU-2021:2427-1)NessusSuSE Local Security Checks
high
151897Slackware 14.2 : Slackware 14.2 kernel (SSA:2021-202-01)NessusSlackware Local Security Checks
high
151884SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2409-1)NessusSuSE Local Security Checks
high
151880SUSE SLES15 Security Update : kernel (SUSE-SU-2021:2408-1)NessusSuSE Local Security Checks
high
151878SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2406-1)NessusSuSE Local Security Checks
high
151877SUSE SLES12 Security Update : kernel (SUSE-SU-2021:2407-1)NessusSuSE Local Security Checks
high
151873SUSE SLED12 / SLES12 Security Update : kernel (SUSE-SU-2021:2416-1)NessusSuSE Local Security Checks
high
151870SUSE SLED15 / SLES15 Security Update : kernel (SUSE-SU-2021:2415-1)NessusSuSE Local Security Checks
high
151851openSUSE 15 Security Update : kernel (openSUSE-SU-2021:2409-1)NessusSuSE Local Security Checks
high
151847openSUSE 15 Security Update : kernel (openSUSE-SU-2021:2415-1)NessusSuSE Local Security Checks
high