En bref
- CVE-2019-11841 est une vulnérabilité MOYENNE (CVSS 5.9) touchant golang.org/x/crypto, crypto (golang).
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 2.0%, plus élevée que 80.8% des vulnérabilités.
- Correctif : mettre à jour vers 0.0.0-20190424203555-c05e17bb3b2d ou plus récent.
| Package | Affected versions | Patched versions |
|---|
| golang.org/x/crypto Go | < 0.0.0-20190424203555-c05e17bb3b2d
| 0.0.0-20190424203555-c05e17bb3b2d
|
| crypto | = 2019-03-25
| No fix yet |
Description
A message-forgery issue was discovered in crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography libraries 2019-03-25. According to the OpenPGP Message Format specification in RFC 4880 chapter 7, a cleartext signed message can contain one or more optional "Hash" Armor Headers. The "Hash" Armor Header specifies the message digest algorithm(s) used for the signature. However, the Go clearsign package ignores the value of this header, which allows an attacker to spoof it. Consequently, an attacker can lead a victim to believe the signature was generated using a different message digest algorithm than what was actually used. Moreover, since the library skips Armor Header parsing in general, an attacker can not only embed arbitrary Armor Headers, but also prepend arbitrary text to cleartext messages without invalidating the signatures.
NVD description
A message-forgery issue was discovered in crypto/openpgp/clearsign/clearsign.go in supplementary Go cryptography libraries 2019-03-25. According to the OpenPGP Message Format specification in RFC 4880 chapter 7, a cleartext signed message can contain one or more optional "Hash" Armor Headers. The "Hash" Armor Header specifies the message digest algorithm(s) used for the signature. However, the Go clearsign package ignores the value of this header, which allows an attacker to spoof it. Consequently, an attacker can lead a victim to believe the signature was generated using a different message digest algorithm than what was actually used. Moreover, since the library skips Armor Header parsing in general, an attacker can not only embed arbitrary Armor Headers, but also prepend arbitrary text to cleartext messages without invalidating the signatures.
Autres vulnérabilités de golang.org/x/crypto
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