CVE-2019-11841 Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current 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.
Source:
MITRE
View Analysis Description
Analysis 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.
Source:
MITRE
Severity
CVSS 3.x Severity and Metrics:
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 Severity and Metrics:
Vector: (AV:N/AC:M/Au:N/C:N/I:P/A:N)
References to Advisories, Solutions, and Tools
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Weakness Enumeration
| CWE-ID |
CWE Name |
Source |
| CWE-310 |
Cryptographic Issues |
NIST
|
Change History
2 change records found
- show changes
CVE Modified by MITRE -
9/13/2019 5:15:10 AM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html [No Types Assigned] |
Initial Analysis -
5/24/2019 7:29:37 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:golang:crypto:2019-03-25:*:*:*:*:*:*:* |
| Added |
CVSS V2 |
|
(AV:N/AC:M/Au:N/C:N/I:P/A:N) |
| Added |
CVSS V3 |
|
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
| Added |
CWE |
|
CWE-310 |
| Changed |
Reference Type |
http://packetstormsecurity.com/files/152840/Go-Cryptography-Libraries-Cleartext-Message-Spoofing.html No Types Assigned |
http://packetstormsecurity.com/files/152840/Go-Cryptography-Libraries-Cleartext-Message-Spoofing.html Exploit, Third Party Advisory, VDB Entry |
| Changed |
Reference Type |
https://go.googlesource.com/crypto/ No Types Assigned |
https://go.googlesource.com/crypto/ Product, Third Party Advisory |
| Changed |
Reference Type |
https://sec-consult.com/ No Types Assigned |
https://sec-consult.com/ Third Party Advisory |
| Changed |
Reference Type |
https://sec-consult.com/en/blog/advisories/cleartext-message-spoofing-in-go-cryptography-libraries-cve-2019-11841/ No Types Assigned |
https://sec-consult.com/en/blog/advisories/cleartext-message-spoofing-in-go-cryptography-libraries-cve-2019-11841/ Exploit, Third Party Advisory |
Quick Info
CVE Dictionary Entry:
CVE-2019-11841
NVD Published Date:
05/22/2019
NVD Last Modified:
09/13/2019
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