Is CVE-2020-24722 in the CISA KEV catalog?

No. CVE-2020-24722 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-24722?

CVE-2020-24722 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2020-24722?

CVE-2020-24722 has an EPSS score of 2.46% (83th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix or mitigate CVE-2020-24722?

No published fix for CVE-2020-24722 has been found yet. Check the linked vendor advisories for guidance as it becomes available.

CVE & CISA-KEV Catalog

CVE-2020-24722

MEDIUMEPSS 83th pctl

5.9

CVSS v3

NVD

Description

An issue was discovered in the GAEN (aka Google/Apple Exposure Notifications) protocol through 2020-10-05, as used in COVID-19 applications on Android and iOS. The encrypted metadata block with a TX value lacks a checksum, allowing bitflipping to amplify a contamination attack. This can cause metadata deanonymization and risk-score inflation. NOTE: the vendor's position is "We do not believe that TX power authentication would be a useful defense against relay attacks.

CWE-294

How to fix

No published remediation has been found for this vulnerability's affected products yet.

Mitigation guidance may be in the linked vendor advisories in the References section below.

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CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

2.46%probability of exploitation in 30 days

83rdpercentile

Elevated risk: more likely to be exploited than 83% of all known CVEs.

References

Exploit2

Third-Party Advisory2

Related Vulnerabilities

Other CWE-294 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-23397	Critical	9.8	97%	KEV	Fix
CVE-2017-3191	Critical	9.8	63%	-	-
CVE-2023-49231	Critical	9.8	43%	-	-
CVE-2002-0054	High	7.5	22%	-	-
CVE-2022-29593	Medium	5.9	13%	-	-
CVE-2022-22806	Critical	9.8	12%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.