CVE-2019-12121Network attack vector

Unauthenticated decryption via UserId padding oracle

Published Mar 18, 2020 · Updated Aug 4, 2024

Padding-oracle exposure in ONAP Portal through Dublin allows remote attackers to decrypt data encrypted with the UserId key. The processSingleSignOn endpoint accepts modified UserId ciphertext and reveals distinguishable padding outcomes, creating an oracle against the shared symmetric key. No authentication or user interaction is required, and every Portal setup exposes information protected by that key.

CVSS severity7.5
High
EPSS probability0.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Padding-oracle exposure in ONAP Portal through Dublin allows remote attackers to decrypt data encrypted with the UserId key. The processSingleSignOn endpoint accepts modified UserId ciphertext and reveals distinguishable padding outcomes, creating an oracle against the shared symmetric key. No authentication or user interaction is required, and every Portal setup exposes information protected by that key.

The record

CVE
CVE-2019-12121
Published
Mar 18, 2020
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-326, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

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

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

CWE-326Inadequate Encryption Strength
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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