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CVE Record

CVE-2020-36284: Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signatu...

Union Pay up to 3.4.93.4.9, for android, contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability, allows attackers to shop for free in merchants' websites and mobile apps, via a crafted authentication code (MAC) which is generated based on a secret key which is NULL.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This CVE describes a Union Pay Android issue where transaction authentication could be accepted with a weak or null secret key condition, potentially letting attackers complete purchases without valid payment. The strongest business concern is payment fraud, but the public bundle lacks CVSS scoring, vendor advisory details, and confirmed affected product metadata. Exposure is most relevant to merchants, payment flows, or mobile apps relying on the affected Union Pay Android implementation or its authentication-code validation path. The bundle does not identify CPEs, package names, deployment scope, or backend integration details. Prioritize assessment if the organization accepts Union Pay payments through affected Android-linked merchant flows. The issue could affect revenue integrity, but urgency depends on confirmed deployment exposure and vendor remediation availability. Mitigation focus: Check Union Pay vendor guidance for fixed versions or migration instructions.; Identify any use of Union Pay Android up to 3.4.93.4.9.; Disable or replace affected payment flows if no vendor fix is available..

Prepared

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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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

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cve · low confidence lookup

CVE-2020-36284 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

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