CVE-2019-11841
OpenPGP Hash Armor Header Spoofing
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.
INFO
Published Date :
May 22, 2019, 5:29 p.m.
Last Modified :
June 17, 2023, 12:15 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-11841.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/152840/Go-Cryptography-Libraries-Cleartext-Message-Spoofing.html | Exploit Third Party Advisory VDB Entry |
| https://go.googlesource.com/crypto/ | Product Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html | |
| https://sec-consult.com/ | Third Party Advisory |
| https://sec-consult.com/en/blog/advisories/cleartext-message-spoofing-in-go-cryptography-libraries-cve-2019-11841/ | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-11841 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-11841 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jun. 17, 2023
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html [No Types Assigned] -
Modified Analysis by [email protected]
May. 03, 2022
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html No Types Assigned https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html Mailing List, Third Party Advisory Changed Reference Type https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html No Types Assigned https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-310 CWE-347 -
CVE Modified by [email protected]
Oct. 08, 2020
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html [No Types Assigned] -
CVE Modified by [email protected]
Sep. 13, 2019
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html [No Types Assigned] -
Initial Analysis by [email protected]
May. 24, 2019
Action Type Old Value New Value 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 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/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 Changed Reference Type https://sec-consult.com/ No Types Assigned https://sec-consult.com/ Third Party Advisory 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 Added CWE CWE-310 Added CPE Configuration OR *cpe:2.3:a:golang:crypto:2019-03-25:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-11841 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-11841
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.87 }} 0.15%
score
0.82769
percentile