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CVE-2020-4355
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,…
Medium5.3EPSS 2.2%
- Published
- Updated
- Reserved
- Assigned by
- ibm
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ibmCNA (assigner) | 3.0 | Medium5.3 | CVSS:3.0/I:N/AV:N/S:U/C:N/UI:N/PR:N/A:L/AC:L/RC:C/RL:O/E:U |
| NVDNVD · Modified | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
- EPSS (exploitation in 30 days)
- 2.2% · top 18% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- Denial of Service
Affected products
IBM · DB2 for Linux- UNIX and Windows
- affected 9.7
- affected 10.1
- affected 10.5
- affected 11.1
- affected 11.5
References (2)
- https://www.ibm.com/support/pages/node/6242350 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ibm-db2-cve20204355-dos (178507) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-4355)Record last updated .