CVE-2016-9121 Elliptic Curve Key Disclosure in go-jose

What is CVE-2016-9121?

CVE-2016-9121 is a critical vulnerability in Go JOSE All versions before 1.0.4, published on 28 Mar 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

go-jose before 1.0.4 suffers from an invalid curve attack for the ECDH-ES algorithm. When deriving a shared key using ECDH-ES for an encrypted message, go-jose neglected to check that the received public key on a message is on the same curve as the static private key of the receiver, thus making it vulnerable to an invalid curve attack.

Weakness: CWE-326

Which versions are affected by CVE-2016-9121?

5 open source packages ship an affected version, including github.com/square/go-jose and gopkg.in/square/go-jose.v1. It affects 1 product.

Products include Go-Jose Project Go-Jose.

How do I fix CVE-2016-9121?

Upgrade github.com/square/go-jose to 1.0.4 or later.

Is CVE-2016-9121 being exploited?

There is no known exploitation of CVE-2016-9121 in the wild and no public exploit code.

Other vulnerabilities in Go JOSE All versions before 1.0.4

• CVE-2026-34986 Go JOSE affect by a panic in JWE decryption High 7.5
• CVE-2016-9122 Go JOSE Signature Validation Bypass High 7.5
• CVE-2016-9123 Integer Overflow in go-jose High 7.5

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2016-9121, GHSA-86r9-39j9-99wp, GO-2020-0010.