Vulnerability identifier: #VU52902

Vulnerability risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-3121

CWE-ID: CWE-129

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Protobuf
Universal components / Libraries / Programming Languages & Components

Vendor: Gogo

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to improper validation of index array in plugin/unmarshal/unmarshal.go. A remote attacker can pass specially crafted data to the application and bypass implemented security restrictions, possibly leading to remote code execution.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Protobuf: 0.1 - 1.3.1

---

External links
http://github.com/gogo/protobuf/commit/b03c65ea87cdc3521ede29f62fe3ce239267c1bc
http://github.com/gogo/protobuf/compare/v1.3.1...v1.3.2
http://lists.apache.org/thread.html/r88d69555cb74a129a7bf84838073b61259b4a3830190e05a3b87994e@%3Ccommits.pulsar.apache.org%3E
http://lists.apache.org/thread.html/rc1e9ff22c5641d73701ba56362fb867d40ed287cca000b131dcf4a44@%3Ccommits.pulsar.apache.org%3E
http://security.netapp.com/advisory/ntap-20210219-0006/

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.