openEuler update for kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-33909 |
| CWE-ID | CWE-190 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
openEuler Operating systems & Components / Operating system bpftool-debuginfo Operating systems & Components / Operating system package or component kernel-tools-devel Operating systems & Components / Operating system package or component python2-perf Operating systems & Components / Operating system package or component python3-perf Operating systems & Components / Operating system package or component kernel-tools-debuginfo Operating systems & Components / Operating system package or component kernel-debuginfo Operating systems & Components / Operating system package or component bpftool Operating systems & Components / Operating system package or component kernel-tools Operating systems & Components / Operating system package or component perf Operating systems & Components / Operating system package or component kernel-debugsource Operating systems & Components / Operating system package or component python2-perf-debuginfo Operating systems & Components / Operating system package or component kernel-source Operating systems & Components / Operating system package or component perf-debuginfo Operating systems & Components / Operating system package or component kernel-devel Operating systems & Components / Operating system package or component python3-perf-debuginfo Operating systems & Components / Operating system package or component kernel Operating systems & Components / Operating system package or component |
| Vendor | openEuler |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) 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.
Install updates from vendor's repository.
Vulnerable software versionsopenEuler: 20.03 LTS SP1 - 20.03 LTS SP2
bpftool-debuginfo: before 4.19.90-2107.5.0.0098
kernel-tools-devel: before 4.19.90-2107.5.0.0098
python2-perf: before 4.19.90-2107.5.0.0098
python3-perf: before 4.19.90-2107.5.0.0098
kernel-tools-debuginfo: before 4.19.90-2107.5.0.0098
kernel-debuginfo: before 4.19.90-2107.5.0.0098
bpftool: before 4.19.90-2107.5.0.0098
kernel-tools: before 4.19.90-2107.5.0.0098
perf: before 4.19.90-2107.5.0.0098
kernel-debugsource: before 4.19.90-2107.5.0.0098
python2-perf-debuginfo: before 4.19.90-2107.5.0.0098
kernel-source: before 4.19.90-2107.5.0.0098
perf-debuginfo: before 4.19.90-2107.5.0.0098
kernel-devel: before 4.19.90-2107.5.0.0098
python3-perf-debuginfo: before 4.19.90-2107.5.0.0098
kernel: before 4.19.90-2107.5.0.0098
CPE2.3- cpe:2.3:o:openeuler:openeuler:20.03:LTS SP1:*:*:*:*:*:*
- cpe:2.3:o:openeuler:openeuler:20.03:LTS SP2:*:*:*:*:*:*
- cpe:2.3:a:openeuler:bpftool-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-tools-devel:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:python2-perf:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:python3-perf:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-tools-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:bpftool:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-tools:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:perf:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-debugsource:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:python2-perf-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-source:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:perf-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel-devel:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:python3-perf-debuginfo:*:*:*:*:*:openeuler:*:*
- cpe:2.3:a:openeuler:kernel:*:*:*:*:*:openeuler:*:*
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1293
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.
