Is CVE-2021-3121 in the CISA KEV catalog?

No. CVE-2021-3121 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3121?

CVE-2021-3121 has a CVSS v3 base score of 8.6 (HIGH).

What is the EPSS score for CVE-2021-3121?

CVE-2021-3121 has an EPSS score of 3.48% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3121?

Upgrade golang-gogoprotobuf on debian 11 to 1.3.2-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3121

HIGHEPSS 88th pctl

8.6

CVSS v3

NVD

Description

An issue was discovered in GoGo Protobuf before 1.3.2. plugin/unmarshal/unmarshal.go lacks certain index validation, aka the "skippy peanut butter" issue.

CWE-129

How to fix

Remediation Available

golang-gogoprotobufDebian

Fixed in:1.3.2-1CVE-2021-3121

HashiCorp ConsulWindows application

Affected:1.8.15Fixed in:1.8.15HashiCorp

Affected:1.10.0 1.10.2Fixed in:1.10.2HashiCorp

Affected:1.9.0 1.9.9Fixed in:1.9.9HashiCorp

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityHigh

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

Exploit Intelligence

3.48%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch2

Third-Party Advisory2

Other references3

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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.