Anolis OS update for kernel(RHCK)4.18 (Anolis OS 8.4)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-26541 CVE-2021-33034 |
| CWE-ID | CWE-693 CWE-416 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
Anolis OS Operating systems & Components / Operating system kernel-doc Operating systems & Components / Operating system package or component python3-perf Operating systems & Components / Operating system package or component perf Operating systems & Components / Operating system package or component kernel-tools-libs Operating systems & Components / Operating system package or component kernel-tools Operating systems & Components / Operating system package or component kernel-modules-extra Operating systems & Components / Operating system package or component kernel-modules Operating systems & Components / Operating system package or component kernel-headers Operating systems & Components / Operating system package or component kernel-devel Operating systems & Components / Operating system package or component kernel-debug-modules-extra Operating systems & Components / Operating system package or component kernel-debug-modules Operating systems & Components / Operating system package or component kernel-debug-devel Operating systems & Components / Operating system package or component kernel-debug-core Operating systems & Components / Operating system package or component kernel-debug Operating systems & Components / Operating system package or component kernel-cross-headers Operating systems & Components / Operating system package or component kernel-core Operating systems & Components / Operating system package or component kernel Operating systems & Components / Operating system package or component bpftool Operating systems & Components / Operating system package or component |
| Vendor | OpenAnolis |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Protection Mechanism Failure
EUVDB-ID: #VU54455
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-2020-26541
CWE-ID:
CWE-693 - Protection Mechanism Failure
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The Linux kernel through 5.8.13 does not properly enforce the Secure
Boot Forbidden Signature Database (aka dbx) protection mechanism. This
affects certs/blacklist.c and certs/system_keyring.c. A local user can escalate privileges on the system.
Install updates from vendor's repository.
Vulnerable software versionsAnolis OS: 8
kernel-doc: before 4.18.0-305.7.1
python3-perf: before 4.18.0-305.7.1
perf: before 4.18.0-305.7.1
kernel-tools-libs: before 4.18.0-305.7.1
kernel-tools: before 4.18.0-305.7.1
kernel-modules-extra: before 4.18.0-305.7.1
kernel-modules: before 4.18.0-305.7.1
kernel-headers: before 4.18.0-305.7.1
kernel-devel: before 4.18.0-305.7.1
kernel-debug-modules-extra: before 4.18.0-305.7.1
kernel-debug-modules: before 4.18.0-305.7.1
kernel-debug-devel: before 4.18.0-305.7.1
kernel-debug-core: before 4.18.0-305.7.1
kernel-debug: before 4.18.0-305.7.1
kernel-cross-headers: before 4.18.0-305.7.1
kernel-core: before 4.18.0-305.7.1
kernel: before 4.18.0-305.7.1
bpftool: before 4.18.0-305.7.1
CPE2.3- cpe:2.3:o:openanolis:anolis_os:8:*:*:*:*:*:*:*
- cpe:2.3:a:openanolis:kernel-doc:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:python3-perf:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:perf:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-tools-libs:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-tools:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-modules-extra:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-modules:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-headers:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-devel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-modules-extra:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-modules:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-devel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-core:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-cross-headers:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-core:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:bpftool:*:*:*:*:*:anolis_os:*:*
https://anas.openanolis.cn/errata/detail/ANSA-2021:0034
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-after-free
EUVDB-ID: #VU54454
Risk: Low
CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2021-33034
CWE-ID:
CWE-416 - Use After Free
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in net/bluetooth/hci_event.c when destroying an hci_chan. A local user can escalate privileges on the system.
Install updates from vendor's repository.
Vulnerable software versionsAnolis OS: 8
kernel-doc: before 4.18.0-305.7.1
python3-perf: before 4.18.0-305.7.1
perf: before 4.18.0-305.7.1
kernel-tools-libs: before 4.18.0-305.7.1
kernel-tools: before 4.18.0-305.7.1
kernel-modules-extra: before 4.18.0-305.7.1
kernel-modules: before 4.18.0-305.7.1
kernel-headers: before 4.18.0-305.7.1
kernel-devel: before 4.18.0-305.7.1
kernel-debug-modules-extra: before 4.18.0-305.7.1
kernel-debug-modules: before 4.18.0-305.7.1
kernel-debug-devel: before 4.18.0-305.7.1
kernel-debug-core: before 4.18.0-305.7.1
kernel-debug: before 4.18.0-305.7.1
kernel-cross-headers: before 4.18.0-305.7.1
kernel-core: before 4.18.0-305.7.1
kernel: before 4.18.0-305.7.1
bpftool: before 4.18.0-305.7.1
CPE2.3- cpe:2.3:o:openanolis:anolis_os:8:*:*:*:*:*:*:*
- cpe:2.3:a:openanolis:kernel-doc:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:python3-perf:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:perf:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-tools-libs:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-tools:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-modules-extra:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-modules:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-headers:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-devel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-modules-extra:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-modules:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-devel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug-core:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-debug:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-cross-headers:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel-core:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:kernel:*:*:*:*:*:anolis_os:*:*
- cpe:2.3:a:openanolis:bpftool:*:*:*:*:*:anolis_os:*:*
https://anas.openanolis.cn/errata/detail/ANSA-2021:0034
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.
