SUSE update for the Linux RT Kernel
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2021-0941 CVE-2021-20322 CVE-2021-31916 CVE-2021-34981 |
| CWE-ID | CWE-125 CWE-330 CWE-787 CWE-415 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
SUSE Linux Enterprise Module for Realtime Operating systems & Components / Operating system SUSE MicroOS Operating systems & Components / Operating system ocfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component ocfs2-kmp-rt Operating systems & Components / Operating system package or component kernel-syms-rt Operating systems & Components / Operating system package or component kernel-rt_debug-devel-debuginfo Operating systems & Components / Operating system package or component kernel-rt_debug-devel Operating systems & Components / Operating system package or component kernel-rt_debug-debugsource Operating systems & Components / Operating system package or component kernel-rt_debug-debuginfo Operating systems & Components / Operating system package or component kernel-rt-devel-debuginfo Operating systems & Components / Operating system package or component kernel-rt-devel Operating systems & Components / Operating system package or component gfs2-kmp-rt-debuginfo Operating systems & Components / Operating system package or component gfs2-kmp-rt Operating systems & Components / Operating system package or component dlm-kmp-rt-debuginfo Operating systems & Components / Operating system package or component dlm-kmp-rt Operating systems & Components / Operating system package or component cluster-md-kmp-rt-debuginfo Operating systems & Components / Operating system package or component cluster-md-kmp-rt Operating systems & Components / Operating system package or component kernel-source-rt Operating systems & Components / Operating system package or component kernel-devel-rt Operating systems & Components / Operating system package or component kernel-rt-debugsource Operating systems & Components / Operating system package or component kernel-rt-debuginfo Operating systems & Components / Operating system package or component kernel-rt Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Out-of-bounds read
EUVDB-ID: #VU64702
Risk: Low
CVSSv4.0: 5.9 [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:U/U:Clear]
CVE-ID: CVE-2021-0941
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists in __bpf_skb_max_len() function in net/core/filter.c in the Linux kernel. A local user with special privilege can gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information.
MitigationUpdate the affected package the Linux RT Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP3
SUSE MicroOS: 5.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-65.2
ocfs2-kmp-rt: before 5.3.18-65.2
kernel-syms-rt: before 5.3.18-65.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-65.2
kernel-rt_debug-devel: before 5.3.18-65.2
kernel-rt_debug-debugsource: before 5.3.18-65.2
kernel-rt_debug-debuginfo: before 5.3.18-65.2
kernel-rt-devel-debuginfo: before 5.3.18-65.2
kernel-rt-devel: before 5.3.18-65.2
gfs2-kmp-rt-debuginfo: before 5.3.18-65.2
gfs2-kmp-rt: before 5.3.18-65.2
dlm-kmp-rt-debuginfo: before 5.3.18-65.2
dlm-kmp-rt: before 5.3.18-65.2
cluster-md-kmp-rt-debuginfo: before 5.3.18-65.2
cluster-md-kmp-rt: before 5.3.18-65.2
kernel-source-rt: before 5.3.18-65.2
kernel-devel-rt: before 5.3.18-65.2
kernel-rt-debugsource: before 5.3.18-65.2
kernel-rt-debuginfo: before 5.3.18-65.2
kernel-rt: before 5.3.18-65.2
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_realtime:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt:*:*:*:*:*:suse_linux:*:*
http://www.suse.com/support/update/announcement/2021/suse-su-20213979-1/
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.
2) Use of insufficiently random values
EUVDB-ID: #VU63839
Risk: Medium
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-20322
CWE-ID:
CWE-330 - Use of Insufficiently Random Values
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to an error when processing received ICMP errors. A remote attacker can effectively bypass the source port UDP randomization to gain access to sensitive information.
MitigationUpdate the affected package the Linux RT Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP3
SUSE MicroOS: 5.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-65.2
ocfs2-kmp-rt: before 5.3.18-65.2
kernel-syms-rt: before 5.3.18-65.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-65.2
kernel-rt_debug-devel: before 5.3.18-65.2
kernel-rt_debug-debugsource: before 5.3.18-65.2
kernel-rt_debug-debuginfo: before 5.3.18-65.2
kernel-rt-devel-debuginfo: before 5.3.18-65.2
kernel-rt-devel: before 5.3.18-65.2
gfs2-kmp-rt-debuginfo: before 5.3.18-65.2
gfs2-kmp-rt: before 5.3.18-65.2
dlm-kmp-rt-debuginfo: before 5.3.18-65.2
dlm-kmp-rt: before 5.3.18-65.2
cluster-md-kmp-rt-debuginfo: before 5.3.18-65.2
cluster-md-kmp-rt: before 5.3.18-65.2
kernel-source-rt: before 5.3.18-65.2
kernel-devel-rt: before 5.3.18-65.2
kernel-rt-debugsource: before 5.3.18-65.2
kernel-rt-debuginfo: before 5.3.18-65.2
kernel-rt: before 5.3.18-65.2
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_realtime:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt:*:*:*:*:*:suse_linux:*:*
http://www.suse.com/support/update/announcement/2021/suse-su-20213979-1/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
3) Out-of-bounds write
EUVDB-ID: #VU63574
Risk: Low
CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-31916
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module. A special user (CAP_SYS_ADMIN) can trigger a buffer overflow in the ioctl for listing devices and escalate privileges on the system.
MitigationUpdate the affected package the Linux RT Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP3
SUSE MicroOS: 5.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-65.2
ocfs2-kmp-rt: before 5.3.18-65.2
kernel-syms-rt: before 5.3.18-65.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-65.2
kernel-rt_debug-devel: before 5.3.18-65.2
kernel-rt_debug-debugsource: before 5.3.18-65.2
kernel-rt_debug-debuginfo: before 5.3.18-65.2
kernel-rt-devel-debuginfo: before 5.3.18-65.2
kernel-rt-devel: before 5.3.18-65.2
gfs2-kmp-rt-debuginfo: before 5.3.18-65.2
gfs2-kmp-rt: before 5.3.18-65.2
dlm-kmp-rt-debuginfo: before 5.3.18-65.2
dlm-kmp-rt: before 5.3.18-65.2
cluster-md-kmp-rt-debuginfo: before 5.3.18-65.2
cluster-md-kmp-rt: before 5.3.18-65.2
kernel-source-rt: before 5.3.18-65.2
kernel-devel-rt: before 5.3.18-65.2
kernel-rt-debugsource: before 5.3.18-65.2
kernel-rt-debuginfo: before 5.3.18-65.2
kernel-rt: before 5.3.18-65.2
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_realtime:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt:*:*:*:*:*:suse_linux:*:*
http://www.suse.com/support/update/announcement/2021/suse-su-20213979-1/
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.
4) Double Free
EUVDB-ID: #VU77325
Risk: Low
CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-34981
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the CMTP module in Linux kernel. A local user can trigger a double free error and execute arbitrary code on the system.
Update the affected package the Linux RT Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP3
SUSE MicroOS: 5.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-65.2
ocfs2-kmp-rt: before 5.3.18-65.2
kernel-syms-rt: before 5.3.18-65.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-65.2
kernel-rt_debug-devel: before 5.3.18-65.2
kernel-rt_debug-debugsource: before 5.3.18-65.2
kernel-rt_debug-debuginfo: before 5.3.18-65.2
kernel-rt-devel-debuginfo: before 5.3.18-65.2
kernel-rt-devel: before 5.3.18-65.2
gfs2-kmp-rt-debuginfo: before 5.3.18-65.2
gfs2-kmp-rt: before 5.3.18-65.2
dlm-kmp-rt-debuginfo: before 5.3.18-65.2
dlm-kmp-rt: before 5.3.18-65.2
cluster-md-kmp-rt-debuginfo: before 5.3.18-65.2
cluster-md-kmp-rt: before 5.3.18-65.2
kernel-source-rt: before 5.3.18-65.2
kernel-devel-rt: before 5.3.18-65.2
kernel-rt-debugsource: before 5.3.18-65.2
kernel-rt-debuginfo: before 5.3.18-65.2
kernel-rt: before 5.3.18-65.2
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_module_for_realtime:15-SP3:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_microos:5.1:*:*:*:*:*:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:ocfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-syms-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt_debug-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-devel:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:gfs2-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:dlm-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:cluster-md-kmp-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-source-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-devel-rt:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:o:suse:kernel-rt:*:*:*:*:*:suse_linux:*:*
http://www.suse.com/support/update/announcement/2021/suse-su-20213979-1/
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.
