5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.006 Low
EPSS
Percentile
77.3%
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 โHashโ Armor Headers. The โHashโ 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.
CPE | Name | Operator | Version |
---|---|---|---|
golang.org/x/crypto | lt | 0.0.0+20190424203555+c05e17bb3b2d |
packetstormsecurity.com/files/152840/Go-Cryptography-Libraries-Cleartext-Message-Spoofing.html
github.com/advisories/GHSA-x3jr-pf6g-c48f
github.com/golang/crypto/commit/c05e17bb3b2dca130fc919668a96b4bec9eb9442
go-review.git.corp.google.com/c/crypto/+/173778
go.googlesource.com/crypto/+/c05e17bb3b2dca130fc919668a96b4bec9eb9442
groups.google.com/d/msg/golang-openpgp/6vdgZoTgbIY/K6bBY9z3DAAJ
lists.debian.org/debian-lts-announce/2019/09/msg00011.html
lists.debian.org/debian-lts-announce/2020/10/msg00014.html
lists.debian.org/debian-lts-announce/2023/06/msg00017.html
nvd.nist.gov/vuln/detail/CVE-2019-11841
pkg.go.dev/vuln/GO-2023-1992
web.archive.org/web/20201207161832/https://sec-consult.com/en/blog/advisories/cleartext-message-spoofing-in-go-cryptography-libraries-cve-2019-11841/
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:N/I:P/A:N
0.006 Low
EPSS
Percentile
77.3%