CVE-2020-4355 Denial of service in DB2 for Linux- UNIX and Windows

What is CVE-2020-4355?

CVE-2020-4355 is a medium-severity denial of service vulnerability in Ibm Db2, published on 1 Jul 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 is vulnerable to a denial of service, caused by improper handling of Secure Sockets Layer (SSL) renegotiation requests. By sending specially-crafted requests, a remote attacker could exploit this vulnerability to increase the resource usage on the system. IBM X-Force ID: 178507.

Which versions are affected by CVE-2020-4355?

It affects 1 product.

Products include Ibm Db2.

How do I fix CVE-2020-4355?

No fix has been published for CVE-2020-4355 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-2020-4355 being exploited?

There is no known exploitation of CVE-2020-4355 in the wild and no public exploit code.

Other vulnerabilities in Ibm Db2

• CVE-2012-1797 IBM DB2 9.5 uses world-writable permissions for nodes.reg, which has unspecified impact and attack vectors. Critical 10.0
• CVE-2010-3731 Memory corruption in n/a Critical 10.0
• CVE-2010-3193 Other in n/a Critical 10.0
• CVE-2009-4335 Other in n/a Critical 10.0
• CVE-2009-3473 Missing authorization in n/a Critical 10.0

All Ibm Db2 vulnerabilities

Sources

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

Also known as GHSA-6qmh-qf4p-53f5.