CVE - CVE-2019-11841

CVE-ID
CVE-2019-11841	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:http://packetstormsecurity.com/files/152840/Go-Cryptography-Libraries-Cleartext-Message-Spoofing.html MISC:https://go.googlesource.com/crypto/ MISC:https://sec-consult.com/ MISC:https://sec-consult.com/en/blog/advisories/cleartext-message-spoofing-in-go-cryptography-libraries-cve-2019-11841/ MLIST:[debian-lts-announce] 20190913 [SECURITY] [DLA 1920-1] golang-go.crypto security update URL:https://lists.debian.org/debian-lts-announce/2019/09/msg00011.html MLIST:[debian-lts-announce] 20201007 [SECURITY] [DLA 2402-1] golang-go.crypto security update URL:https://lists.debian.org/debian-lts-announce/2020/10/msg00014.html MLIST:[debian-lts-announce] 20230616 [SECURITY] [DLA 3455-1] golang-go.crypto security update URL:https://lists.debian.org/debian-lts-announce/2023/06/msg00017.html
Assigning CNA
MITRE Corporation
Date Record Created
20190509	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20190509)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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