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Improper Verification of Cryptographic Signature Affecting golang.org/x/crypto/openpgp/clearsign package, versions <0.1.0

0.0
medium

Snyk CVSS

    Attack Complexity High
    Integrity High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 0.73% (81st percentile)
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NVD
5.9 medium

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  • Snyk ID SNYK-GOLANG-GOLANGORGXCRYPTOOPENPGPCLEARSIGN-5813980
  • published 2 Aug 2023
  • disclosed 24 May 2022
  • credit Aida Mynzhasova
Report a new vulnerability Found a mistake?

Introduced: 24 May 2022

CVE-2019-11841 Open this link in a new tab
CWE-347 Open this link in a new tab

How to fix?

Upgrade golang.org/x/crypto/openpgp/clearsign to version 0.1.0 or higher.

Overview

Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature via the crypto/openpgp/clearsign/clearsign.go component. An attacker can spoof the 'Hash' Armor Header, leading a victim to believe the signature was generated using a different message digest algorithm than what was actually used. Moreover, the attacker can prepend arbitrary text to cleartext messages without invalidating the signatures.