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CVE Record

CVE-2020-5024: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could all...

IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow an unauthenticated attacker to cause a denial of service due a hang in the SSL handshake response. IBM X-Force ID: 193660.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This flaw can let an unauthenticated remote actor make affected IBM Db2 services hang during SSL handshake processing. The business impact is availability loss for applications depending on Db2, not data theft or data modification based on the provided sources.

Executive priority

Treat this as a high-priority availability risk for business-critical databases. It is not described as data compromise, but outages in shared Db2 services can cascade into application downtime.

Technical view

CVE-2020-5024 affects IBM Db2 for Linux, UNIX and Windows, including Db2 Connect Server, versions 9.7, 10.1, 10.5, 11.1, and 11.5. CVSS 3.0 is 7.5: network reachable, low complexity, no privileges, no user interaction, high availability impact only.

Likely exposure

Exposure is most likely where affected Db2 or Db2 Connect Server instances accept network connections with SSL/TLS enabled, especially from untrusted networks or application tiers with broad reachability.

Exploitation context

The source bundle does not show CISA KEV listing or cited active exploitation. The vulnerability is still important because exploitation is unauthenticated and network-based, but the described outcome is denial of service only.

Researcher notes

The public bundle names the SSL handshake response hang but provides limited root-cause detail and no CWE. The CVSS vector indicates official remediation exists, but exact fixed builds should be taken from IBM and relevant downstream vendor advisories.

Mitigation direction

  • Apply IBM-supported fixes or fix packs referenced by IBM guidance.
  • Confirm whether any NetApp-advised products in your environment require vendor remediation.
  • Restrict Db2 listener access to trusted application hosts where feasible.
  • Prioritize internet-exposed or cross-zone reachable Db2 services first.
  • Monitor Db2 availability and SSL handshake errors until remediation is complete.

Validation and detection

  • Inventory Db2 LUW and Db2 Connect Server versions across servers.
  • Identify instances running versions 9.7, 10.1, 10.5, 11.1, or 11.5.
  • Confirm whether Db2 SSL/TLS listener endpoints are reachable from untrusted networks.
  • Verify installed maintenance level against IBM’s advisory guidance.
  • Review NetApp advisory applicability for dependent appliances or software.
Prepared
Confidence
high
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2020-5024 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.5 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AC:L/PR:N/AV:N/UI:N/I:N/S:U/C:N/A:H/RC:C/E:U/RL:O

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.5CVSS 3.0HighCVSS:3.0/AC:L/PR:N/AV:N/UI:N/I:N/S:U/C:N/A:H/RC:C/E:U/RL:O3.93.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

7.5High
CVSS 3.0 vector shape for CVE-2020-5024Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AC:L/PR:N/AV:N/UI:N/I:N/S:U/C:N/A:H/RC:C/E:U/RL:O

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMDB2 for Linux, UNIX and Windows10.5, 10.1, 9.7, 11.1, 11.5Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.