Privilege escalation in ClusterLabs crmsh
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-35459 |
| CWE-ID | CWE-269 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software |
crmsh Client/Desktop applications / Software for system administration |
| Vendor | ClusterLabs |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Improper Privilege Management
EUVDB-ID: #VU51457
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-2020-35459
CWE-ID:
CWE-269 - Improper Privilege Management
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper privilege management. A local user can call "crm history" (when "crm" is run) and execute commands via shell code injection to the crm history commandline, potentially allowing escalation of privileges.
MitigationInstall updates from vendor's website.
Vulnerable software versionscrmsh: 1.2.0 - 4.2.1
CPE2.3- cpe:2.3:a:clusterlabs:crmsh:1.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:clusterlabs:crmsh:1.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:clusterlabs:crmsh:1.2.2:*:*:*:*:*:*:*
https://www.openwall.com/lists/oss-security/2021/01/12/3
https://bugzilla.suse.com/show_bug.cgi?id=1179999
https://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476
https://github.com/ClusterLabs/crmsh/releases
https://lists.debian.org/debian-lts-announce/2021/01/msg00021.html
https://www.openwall.com/lists/oss-security/2021/01/12/3
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.
