Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 5 |
CVE-ID | CVE-2021-21781 CVE-2021-22543 CVE-2021-33909 CVE-2021-3659 CVE-2021-37576 |
CWE-ID | CWE-200 CWE-119 CWE-190 CWE-476 CWE-787 |
Exploitation vector | Network |
Public exploit |
Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. |
Vulnerable software |
SUSE Linux Enterprise Module for Realtime Operating systems & Components / Operating system SUSE MicroOS Operating systems & Components / Operating system kernel-source-rt Operating systems & Components / Operating system package or component kernel-devel-rt Operating systems & Components / Operating system package or component 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_debug 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-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 5 vulnerabilities.
EUVDB-ID: #VU54395
Risk: Low
CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-21781
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output in the ARM SIGPAGE functionality. A userland application can read the contents of the sigpage, which can leak kernel memory contents.
MitigationUpdate the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP2
SUSE MicroOS: 5.0
kernel-source-rt: before 5.3.18-48.1
kernel-devel-rt: before 5.3.18-48.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-48.1
ocfs2-kmp-rt: before 5.3.18-48.1
kernel-syms-rt: before 5.3.18-48.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-48.1
kernel-rt_debug-devel: before 5.3.18-48.1
kernel-rt_debug-debugsource: before 5.3.18-48.1
kernel-rt_debug-debuginfo: before 5.3.18-48.1
kernel-rt_debug: before 5.3.18-48.1
kernel-rt-devel-debuginfo: before 5.3.18-48.1
kernel-rt-devel: before 5.3.18-48.1
gfs2-kmp-rt-debuginfo: before 5.3.18-48.1
gfs2-kmp-rt: before 5.3.18-48.1
dlm-kmp-rt-debuginfo: before 5.3.18-48.1
dlm-kmp-rt: before 5.3.18-48.1
cluster-md-kmp-rt-debuginfo: before 5.3.18-48.1
cluster-md-kmp-rt: before 5.3.18-48.1
kernel-rt-debugsource: before 5.3.18-48.1
kernel-rt-debuginfo: before 5.3.18-48.1
kernel-rt: before 5.3.18-48.1
CPE2.3http://www.suse.com/support/update/announcement/2021/suse-su-20212678-1/
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.
EUVDB-ID: #VU56018
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-2021-22543
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in Linux kernel when handling VM_IO|VM_PFNMAP vmas in KVM. A local user can can bypass RO checks and cause the pages to get freed while still accessible by the VMM and guest. As a result, an attacker with the ability to start and control a VM to read/write random pages of memory, can trigger memory corruption and execute arbitrary code with elevated privileges.
Update the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP2
SUSE MicroOS: 5.0
kernel-source-rt: before 5.3.18-48.1
kernel-devel-rt: before 5.3.18-48.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-48.1
ocfs2-kmp-rt: before 5.3.18-48.1
kernel-syms-rt: before 5.3.18-48.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-48.1
kernel-rt_debug-devel: before 5.3.18-48.1
kernel-rt_debug-debugsource: before 5.3.18-48.1
kernel-rt_debug-debuginfo: before 5.3.18-48.1
kernel-rt_debug: before 5.3.18-48.1
kernel-rt-devel-debuginfo: before 5.3.18-48.1
kernel-rt-devel: before 5.3.18-48.1
gfs2-kmp-rt-debuginfo: before 5.3.18-48.1
gfs2-kmp-rt: before 5.3.18-48.1
dlm-kmp-rt-debuginfo: before 5.3.18-48.1
dlm-kmp-rt: before 5.3.18-48.1
cluster-md-kmp-rt-debuginfo: before 5.3.18-48.1
cluster-md-kmp-rt: before 5.3.18-48.1
kernel-rt-debugsource: before 5.3.18-48.1
kernel-rt-debuginfo: before 5.3.18-48.1
kernel-rt: before 5.3.18-48.1
CPE2.3http://www.suse.com/support/update/announcement/2021/suse-su-20212678-1/
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.
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 Module for Realtime: 15-SP2
SUSE MicroOS: 5.0
kernel-source-rt: before 5.3.18-48.1
kernel-devel-rt: before 5.3.18-48.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-48.1
ocfs2-kmp-rt: before 5.3.18-48.1
kernel-syms-rt: before 5.3.18-48.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-48.1
kernel-rt_debug-devel: before 5.3.18-48.1
kernel-rt_debug-debugsource: before 5.3.18-48.1
kernel-rt_debug-debuginfo: before 5.3.18-48.1
kernel-rt_debug: before 5.3.18-48.1
kernel-rt-devel-debuginfo: before 5.3.18-48.1
kernel-rt-devel: before 5.3.18-48.1
gfs2-kmp-rt-debuginfo: before 5.3.18-48.1
gfs2-kmp-rt: before 5.3.18-48.1
dlm-kmp-rt-debuginfo: before 5.3.18-48.1
dlm-kmp-rt: before 5.3.18-48.1
cluster-md-kmp-rt-debuginfo: before 5.3.18-48.1
cluster-md-kmp-rt: before 5.3.18-48.1
kernel-rt-debugsource: before 5.3.18-48.1
kernel-rt-debuginfo: before 5.3.18-48.1
kernel-rt: before 5.3.18-48.1
CPE2.3http://www.suse.com/support/update/announcement/2021/suse-su-20212678-1/
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.
EUVDB-ID: #VU74547
Risk: Low
CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-3659
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a local usre to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the way the user closes the LR-WPAN connection within the IEEE 802.15.4 wireless networking subsystem. A local user can perform a denial of service (DoS) attack.
MitigationUpdate the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP2
SUSE MicroOS: 5.0
kernel-source-rt: before 5.3.18-48.1
kernel-devel-rt: before 5.3.18-48.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-48.1
ocfs2-kmp-rt: before 5.3.18-48.1
kernel-syms-rt: before 5.3.18-48.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-48.1
kernel-rt_debug-devel: before 5.3.18-48.1
kernel-rt_debug-debugsource: before 5.3.18-48.1
kernel-rt_debug-debuginfo: before 5.3.18-48.1
kernel-rt_debug: before 5.3.18-48.1
kernel-rt-devel-debuginfo: before 5.3.18-48.1
kernel-rt-devel: before 5.3.18-48.1
gfs2-kmp-rt-debuginfo: before 5.3.18-48.1
gfs2-kmp-rt: before 5.3.18-48.1
dlm-kmp-rt-debuginfo: before 5.3.18-48.1
dlm-kmp-rt: before 5.3.18-48.1
cluster-md-kmp-rt-debuginfo: before 5.3.18-48.1
cluster-md-kmp-rt: before 5.3.18-48.1
kernel-rt-debugsource: before 5.3.18-48.1
kernel-rt-debuginfo: before 5.3.18-48.1
kernel-rt: before 5.3.18-48.1
CPE2.3http://www.suse.com/support/update/announcement/2021/suse-su-20212678-1/
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.
EUVDB-ID: #VU57101
Risk: Medium
CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-37576
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a boundary error in arch/powerpc/kvm/book3s_rtas.c in the Linux kernel through 5.13.5 on the powerpc platform. An attacker on KVM guest OS can cause host OS memory corruption via rtas_args.nargs and execute arbitrary code on the host OS.
Update the affected package the Linux Kernel to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Module for Realtime: 15-SP2
SUSE MicroOS: 5.0
kernel-source-rt: before 5.3.18-48.1
kernel-devel-rt: before 5.3.18-48.1
ocfs2-kmp-rt-debuginfo: before 5.3.18-48.1
ocfs2-kmp-rt: before 5.3.18-48.1
kernel-syms-rt: before 5.3.18-48.1
kernel-rt_debug-devel-debuginfo: before 5.3.18-48.1
kernel-rt_debug-devel: before 5.3.18-48.1
kernel-rt_debug-debugsource: before 5.3.18-48.1
kernel-rt_debug-debuginfo: before 5.3.18-48.1
kernel-rt_debug: before 5.3.18-48.1
kernel-rt-devel-debuginfo: before 5.3.18-48.1
kernel-rt-devel: before 5.3.18-48.1
gfs2-kmp-rt-debuginfo: before 5.3.18-48.1
gfs2-kmp-rt: before 5.3.18-48.1
dlm-kmp-rt-debuginfo: before 5.3.18-48.1
dlm-kmp-rt: before 5.3.18-48.1
cluster-md-kmp-rt-debuginfo: before 5.3.18-48.1
cluster-md-kmp-rt: before 5.3.18-48.1
kernel-rt-debugsource: before 5.3.18-48.1
kernel-rt-debuginfo: before 5.3.18-48.1
kernel-rt: before 5.3.18-48.1
CPE2.3http://www.suse.com/support/update/announcement/2021/suse-su-20212678-1/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.