Summaryinfo

A vulnerability was found in go-jose up to 1.0.3 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Signature Handler. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2016-9122. The attack can be executed remotely. There is not any exploit available. It is suggested to upgrade the affected component. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability classified as critical was found in go-jose up to 1.0.3. This vulnerability affects an unknown code of the component Signature Handler. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

go-jose before 1.0.4 suffers from multiple signatures exploitation. The go-jose library supports messages with multiple signatures. However, when validating a signed message the API did not indicate which signature was valid, which could potentially lead to confusion. For example, users of the library might mistakenly read protected header values from an attached signature that was different from the one originally validated.

The bug was discovered 11/02/2016. The weakness was released 03/28/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2016-9122 since 10/31/2016. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability was handled as a non-public zero-day exploit for at least 145 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.0.4 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-98955 and VDB-98957. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

• go-jose

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3

License

• open-source

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