openpgp@1.5.6 vulnerabilities

openpgp is a JavaScript implementation of the OpenPGP protocol.

Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature when the openpgp.readCleartextMessage() and openpgp.cleartext.readArmored() functions are used. An attacker can manipulate the contents of a Cleartext Signed Message, leading the victim to believe that the manipulated text was signed by the original sender.

Note: This is only exploitable if the user or application verifies the CleartextMessage by only checking the returned verified property, discarding the associated data information, and instead visually trusting the contents of the original message.

Upgrade openpgp to version 4.10.11, 5.10.1 or higher.

openpgp is a JavaScript implementation of the OpenPGP protocol.

Affected versions of this package are vulnerable to Invalid Curve Attack. It allows an attacker, who is already able provide forged messages and gain feedback about whether decryption of these messages succeeded, to conduct an invalid curve attack in order to gain the victim's ECDH private key.

Upgrade openpgp to version 4.2.1 or higher.

openpgp is a JavaScript implementation of the OpenPGP protocol.

Affected versions of this package are vulnerable to Message Signature Bypass. OpenPGP defines several types of signatures with each type carrying a different semantic. Signatures are implemented as packets and each signature packet can contain subpackets.

To indicate a message signature (e.g. a signed e-mail), the signature type “text” is used. The text signature packet verifies both its subpackets as well as the signed text.

During verification of a message signature, OpenPGP.js does not verify that the signature is of type text. An attacker could therefore construct a message that, instead of a text signature, contains a signature of another type. As the input required for the verification process depends on the signature type, an attacker could use a signature with a type that only verifies its subpackets and does not require additional input.

An attacker could construct a message that contains a valid “standalone” or “timestamp” signature packet signed by another person. OpenPGP.js would incorrectly assume this message to be signed by that person.

Upgrade openpgp to version 4.2.0 or higher.

openpgp is a JavaScript implementation of the OpenPGP protocol.

Affected versions of this package are vulnerable to Improper Authentication. OpenPGP signature subpackets contain information related to a signature (e.g. the creation timestamp). These subpackets may appear in a “hashed” and “unhashed” subpacket container. While the information in the hashed subpackets is signed, the unhashed subpackets are not cryptographically protected.

An attacker could arbitrarily modify the contents of e.g. a key certification signature or revocation signature. As a result, the attacker could e.g. convince a victim to use an obsolete key for encryption.

Upgrade openpgp to version 4.2.0 or higher.