SUSE update for the Linux Kernel
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2021-22555 CVE-2021-33909 |
| CWE-ID | CWE-787 CWE-190 |
| Exploitation vector | Local |
| Public exploit |
Vulnerability #1 is being exploited in the wild. Public exploit code for vulnerability #2 is available. |
| Vulnerable software |
SUSE Linux Enterprise Workstation Extension Operating systems & Components / Operating system SUSE Linux Enterprise Module for Legacy Software Operating systems & Components / Operating system SUSE Linux Enterprise High Availability Operating systems & Components / Operating system SUSE Linux Enterprise Module for Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise Module for Development Tools Operating systems & Components / Operating system SUSE Linux Enterprise Module for Basesystem Operating systems & Components / Operating system ocfs2-kmp-default-debuginfo Operating systems & Components / Operating system package or component ocfs2-kmp-default Operating systems & Components / Operating system package or component gfs2-kmp-default-debuginfo Operating systems & Components / Operating system package or component gfs2-kmp-default Operating systems & Components / Operating system package or component dlm-kmp-default-debuginfo Operating systems & Components / Operating system package or component dlm-kmp-default Operating systems & Components / Operating system package or component cluster-md-kmp-default-debuginfo Operating systems & Components / Operating system package or component cluster-md-kmp-default Operating systems & Components / Operating system package or component kernel-zfcpdump-debugsource Operating systems & Components / Operating system package or component kernel-zfcpdump-debuginfo Operating systems & Components / Operating system package or component kernel-zfcpdump Operating systems & Components / Operating system package or component kernel-macros Operating systems & Components / Operating system package or component kernel-devel Operating systems & Components / Operating system package or component kernel-64kb-devel-debuginfo Operating systems & Components / Operating system package or component kernel-64kb-devel Operating systems & Components / Operating system package or component kernel-64kb-debugsource Operating systems & Components / Operating system package or component kernel-64kb-debuginfo Operating systems & Components / Operating system package or component kernel-64kb Operating systems & Components / Operating system package or component kernel-preempt Operating systems & Components / Operating system package or component kernel-default-devel-debuginfo Operating systems & Components / Operating system package or component kernel-default-devel Operating systems & Components / Operating system package or component kernel-default-base Operating systems & Components / Operating system package or component kernel-default Operating systems & Components / Operating system package or component kernel-source Operating systems & Components / Operating system package or component kernel-docs Operating systems & Components / Operating system package or component kernel-preempt-devel-debuginfo Operating systems & Components / Operating system package or component kernel-preempt-devel Operating systems & Components / Operating system package or component kernel-syms Operating systems & Components / Operating system package or component kernel-obs-build-debugsource Operating systems & Components / Operating system package or component kernel-obs-build Operating systems & Components / Operating system package or component reiserfs-kmp-default-debuginfo Operating systems & Components / Operating system package or component reiserfs-kmp-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-59_16-default Operating systems & Components / Operating system package or component kernel-default-livepatch-devel Operating systems & Components / Operating system package or component kernel-default-livepatch Operating systems & Components / Operating system package or component kernel-preempt-extra-debuginfo Operating systems & Components / Operating system package or component kernel-preempt-extra Operating systems & Components / Operating system package or component kernel-preempt-debugsource Operating systems & Components / Operating system package or component kernel-preempt-debuginfo Operating systems & Components / Operating system package or component kernel-default-extra-debuginfo Operating systems & Components / Operating system package or component kernel-default-extra Operating systems & Components / Operating system package or component kernel-default-debugsource Operating systems & Components / Operating system package or component kernel-default-debuginfo Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds write
EUVDB-ID: #VU56017
Risk: Low
CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]
CVE-ID: CVE-2021-22555
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: Yes
Description The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error when processing untrusted input in net/netfilter/x_tables.c in Linux kernel. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.
Update the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Workstation Extension: 15-SP3
SUSE Linux Enterprise Module for Legacy Software: 15-SP3
SUSE Linux Enterprise High Availability: 15-SP3
SUSE Linux Enterprise Module for Live Patching: 15-SP3
SUSE Linux Enterprise Module for Development Tools: 15-SP3
SUSE Linux Enterprise Module for Basesystem: 15-SP3
ocfs2-kmp-default-debuginfo: before 5.3.18-59.16.1
ocfs2-kmp-default: before 5.3.18-59.16.1
gfs2-kmp-default-debuginfo: before 5.3.18-59.16.1
gfs2-kmp-default: before 5.3.18-59.16.1
dlm-kmp-default-debuginfo: before 5.3.18-59.16.1
dlm-kmp-default: before 5.3.18-59.16.1
cluster-md-kmp-default-debuginfo: before 5.3.18-59.16.1
cluster-md-kmp-default: before 5.3.18-59.16.1
kernel-zfcpdump-debugsource: before 5.3.18-59.16.1
kernel-zfcpdump-debuginfo: before 5.3.18-59.16.1
kernel-zfcpdump: before 5.3.18-59.16.1
kernel-macros: before 5.3.18-59.16.1
kernel-devel: before 5.3.18-59.16.1
kernel-64kb-devel-debuginfo: before 5.3.18-59.16.1
kernel-64kb-devel: before 5.3.18-59.16.1
kernel-64kb-debugsource: before 5.3.18-59.16.1
kernel-64kb-debuginfo: before 5.3.18-59.16.1
kernel-64kb: before 5.3.18-59.16.1
kernel-preempt: before 5.3.18-59.16.1
kernel-default-devel-debuginfo: before 5.3.18-59.16.1
kernel-default-devel: before 5.3.18-59.16.1
kernel-default-base: before 5.3.18-59.16.1.18.8.1
kernel-default: before 5.3.18-59.16.1
kernel-source: before 5.3.18-59.16.1
kernel-docs: before 5.3.18-59.16.1
kernel-preempt-devel-debuginfo: before 5.3.18-59.16.1
kernel-preempt-devel: before 5.3.18-59.16.1
kernel-syms: before 5.3.18-59.16.1
kernel-obs-build-debugsource: before 5.3.18-59.16.1
kernel-obs-build: before 5.3.18-59.16.1
reiserfs-kmp-default-debuginfo: before 5.3.18-59.16.1
reiserfs-kmp-default: before 5.3.18-59.16.1
kernel-livepatch-5_3_18-59_16-default: before 1-7.3.1
kernel-default-livepatch-devel: before 5.3.18-59.16.1
kernel-default-livepatch: before 5.3.18-59.16.1
kernel-preempt-extra-debuginfo: before 5.3.18-59.16.1
kernel-preempt-extra: before 5.3.18-59.16.1
kernel-preempt-debugsource: before 5.3.18-59.16.1
kernel-preempt-debuginfo: before 5.3.18-59.16.1
kernel-default-extra-debuginfo: before 5.3.18-59.16.1
kernel-default-extra: before 5.3.18-59.16.1
kernel-default-debugsource: before 5.3.18-59.16.1
kernel-default-debuginfo: before 5.3.18-59.16.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_workstation_extension:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_legacy_software:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_high_availability:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_development_tools:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-macros:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-base:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-docs:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-obs-build-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-obs-build:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:reiserfs-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:reiserfs-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-livepatch-5_3_18-59_16-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-livepatch-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-livepatch:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-extra-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-extra:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-extra-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-extra:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-debuginfo:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20212415-1/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.
2) Integer overflow
EUVDB-ID: #VU55143
Risk: Low
CVSSv4.0: 7.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2021-33909
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer overflow during size_t-to-int conversion when creating, mounting, and deleting a deep directory structure whose total path length exceeds 1GB. An unprivileged local user can write up to 10-byte string to an offset of exactly -2GB-10B below the beginning of a vmalloc()ated kernel buffer.
Successful exploitation of vulnerability may allow an attacker to exploit the our-of-bounds write vulnerability to execute arbitrary code with root privileges.
Update the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Workstation Extension: 15-SP3
SUSE Linux Enterprise Module for Legacy Software: 15-SP3
SUSE Linux Enterprise High Availability: 15-SP3
SUSE Linux Enterprise Module for Live Patching: 15-SP3
SUSE Linux Enterprise Module for Development Tools: 15-SP3
SUSE Linux Enterprise Module for Basesystem: 15-SP3
ocfs2-kmp-default-debuginfo: before 5.3.18-59.16.1
ocfs2-kmp-default: before 5.3.18-59.16.1
gfs2-kmp-default-debuginfo: before 5.3.18-59.16.1
gfs2-kmp-default: before 5.3.18-59.16.1
dlm-kmp-default-debuginfo: before 5.3.18-59.16.1
dlm-kmp-default: before 5.3.18-59.16.1
cluster-md-kmp-default-debuginfo: before 5.3.18-59.16.1
cluster-md-kmp-default: before 5.3.18-59.16.1
kernel-zfcpdump-debugsource: before 5.3.18-59.16.1
kernel-zfcpdump-debuginfo: before 5.3.18-59.16.1
kernel-zfcpdump: before 5.3.18-59.16.1
kernel-macros: before 5.3.18-59.16.1
kernel-devel: before 5.3.18-59.16.1
kernel-64kb-devel-debuginfo: before 5.3.18-59.16.1
kernel-64kb-devel: before 5.3.18-59.16.1
kernel-64kb-debugsource: before 5.3.18-59.16.1
kernel-64kb-debuginfo: before 5.3.18-59.16.1
kernel-64kb: before 5.3.18-59.16.1
kernel-preempt: before 5.3.18-59.16.1
kernel-default-devel-debuginfo: before 5.3.18-59.16.1
kernel-default-devel: before 5.3.18-59.16.1
kernel-default-base: before 5.3.18-59.16.1.18.8.1
kernel-default: before 5.3.18-59.16.1
kernel-source: before 5.3.18-59.16.1
kernel-docs: before 5.3.18-59.16.1
kernel-preempt-devel-debuginfo: before 5.3.18-59.16.1
kernel-preempt-devel: before 5.3.18-59.16.1
kernel-syms: before 5.3.18-59.16.1
kernel-obs-build-debugsource: before 5.3.18-59.16.1
kernel-obs-build: before 5.3.18-59.16.1
reiserfs-kmp-default-debuginfo: before 5.3.18-59.16.1
reiserfs-kmp-default: before 5.3.18-59.16.1
kernel-livepatch-5_3_18-59_16-default: before 1-7.3.1
kernel-default-livepatch-devel: before 5.3.18-59.16.1
kernel-default-livepatch: before 5.3.18-59.16.1
kernel-preempt-extra-debuginfo: before 5.3.18-59.16.1
kernel-preempt-extra: before 5.3.18-59.16.1
kernel-preempt-debugsource: before 5.3.18-59.16.1
kernel-preempt-debuginfo: before 5.3.18-59.16.1
kernel-default-extra-debuginfo: before 5.3.18-59.16.1
kernel-default-extra: before 5.3.18-59.16.1
kernel-default-debugsource: before 5.3.18-59.16.1
kernel-default-debuginfo: before 5.3.18-59.16.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_workstation_extension:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_legacy_software:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_high_availability:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_live_patching:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_development_tools:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_module_for_basesystem:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-zfcpdump:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-macros:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-64kb:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-base:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-docs:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-obs-build-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-obs-build:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:reiserfs-kmp-default-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:reiserfs-kmp-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-livepatch-5_3_18-59_16-default:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-livepatch-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-livepatch:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-extra-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-extra:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-preempt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-extra-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-extra:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-default-debuginfo:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-20212415-1/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
