#VU19270 Input validation error in Fence Agents - CVE-2019-10153

Vulnerability identifier: #VU19270

Vulnerability 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-2019-10153

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Fence Agents
Server applications / Other server solutions

Vendor: ClusterLabs

Description

The vulnerability allows a remote authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing non-ASCII characters in guest comments field. A remote attacker can append specially crafted comments to the VM and trigger denial of service condition.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Fence Agents: 3.1.0 - 4.3.3

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External links
https://github.com/ClusterLabs/fence-agents/pull/272
https://github.com/ClusterLabs/fence-agents/pull/255

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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.