CVE-2020-4994Network attack vector

Service interruption via missing HTTP header timeout

Published May 17, 2022 · Updated Sep 16, 2024

Denial of service in IBM DataPower Gateway allows remote attackers to interrupt service by sending invalid HTTP requests. The HTTP request handler lacks a header-processing timeout, so invalid requests retain processing resources instead of being terminated. Versions 10.0.1.0 through 10.0.1.4 and 2018.4.1.0 through 2018.4.1.17 are affected; no authentication or user interaction is needed, and the interruption is temporary.

CVSS severity5.3
Medium
EPSS probability1.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in IBM DataPower Gateway allows remote attackers to interrupt service by sending invalid HTTP requests. The HTTP request handler lacks a header-processing timeout, so invalid requests retain processing resources instead of being terminated. Versions 10.0.1.0 through 10.0.1.4 and 2018.4.1.0 through 2018.4.1.17 are affected; no authentication or user interaction is needed, and the interruption is temporary.

The record

CVE
CVE-2020-4994
Published
May 17, 2022
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM DataPower Gateway
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.1.0
  2. Affected versionversion=10.0.1.4
  3. Affected versionversion=2018.4.1.0
  4. Affected versionversion=2018.4.1.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM DataPower Gatewayversion=10.0.1.0; version=10.0.1.4; version=2018.4.1.0; version=2018.4.1.17

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.3IBM CorporationCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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