GoGo protobuf up to 1.3.1 unmarshal.go array index

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.9$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in GoGo protobuf up to 1.3.1. Affected is an unknown function of the file plugin/unmarshal/unmarshal.go. This manipulation causes an unknown weakness. This vulnerability is handled as CVE-2021-3121. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in GoGo protobuf up to 1.3.1. It has been declared as problematic. Affected by this vulnerability is some unknown processing of the file plugin/unmarshal/unmarshal.go. The CWE definition for the vulnerability is CWE-129. The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. The impact remains unknown.

The weakness was released 01/11/2021 as b03c65ea87cdc3521ede29f62fe3ce239267c1bc. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2021-3121. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 255206 (SUSE SLES15 / openSUSE 15 Security Update : kubernetes1.18 (SUSE-SU-2025:02977-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 1.3.2 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (255206). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.6
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Array index
CWE: CWE-129 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 255206
Nessus Name: SUSE SLES15 / openSUSE 15 Security Update : kubernetes1.18 (SUSE-SU-2025:02977-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: protobuf 1.3.2
Patch: github.com

Timelineinfo

01/11/2021 🔍
01/11/2021 +0 days 🔍
01/11/2021 +0 days 🔍
08/26/2025 +1688 days 🔍

Sourcesinfo

Product: github.com

Advisory: b03c65ea87cdc3521ede29f62fe3ce239267c1bc
Status: Confirmed

CVE: CVE-2021-3121 (🔍)
GCVE (CVE): GCVE-0-2021-3121
GCVE (VulDB): GCVE-100-167551

Entryinfo

Created: 01/11/2021 13:11
Updated: 08/26/2025 22:05
Changes: 01/11/2021 13:11 (39), 02/11/2021 06:34 (5), 02/11/2021 06:41 (19), 08/26/2025 22:05 (17)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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