CVE-2020-4491 Denial of service in Spectrum Scale

What is CVE-2020-4491?

CVE-2020-4491 is a medium-severity denial of service vulnerability in Ibm Spectrum Scale, published on 20 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

IBM Spectrum Scale V4.2.0.0 through V4.2.3.22 and V5.0.0.0 through V5.0.5 could allow a local attacker to cause a denial of service by sending a large number of RPC requests to the mmfsd daemon which would cause the service to crash. IBM X-Force ID: 181991.

Which versions are affected by CVE-2020-4491?

It affects 1 product.

Products include Ibm Spectrum Scale.

How do I fix CVE-2020-4491?

No fix has been published for CVE-2020-4491 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2020-4491 being exploited?

There is no known exploitation of CVE-2020-4491 in the wild and no public exploit code.

Other vulnerabilities in Ibm Spectrum Scale

• CVE-2019-4715 Command injection in Spectrum Scale High 8.8
• CVE-2021-29740 Other in Spectrum Scale High 8.4
• CVE-2019-4558 Privilege escalation in Spectrum Scale High 8.1
• CVE-2020-4217 Denial of service in Spectrum Scale High 7.5
• CVE-2020-4273 Command injection in Spectrum Scale High 7.4

All Ibm Spectrum Scale vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-wfcm-rc5q-rwm2.