CVE-2021-26911: core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode

High severity · published Feb 17, 2021

CVE-2021-26911

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode

7.4

CVSS

1.1%

EPSS

On KEV

Description

core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack vector

Network

Complexity

High

Privileges

None

User interaction

None

Confidentiality

High

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.1% · higher than 65% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Canary Mail · Canarymail

3.20; 3.21 · source: NVD

Mailcore2 · Libmailcore

0.6.4 · source: NVD

Affected product

Canary Mail

Canarymail

All Canary Mail CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-26911

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-26911

Mailing List

http://www.openwall.com/lists/oss-security/2021/02/17/3

Product

https://apps.apple.com/us/app/canary-mail/id1236045954

Exploit

https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/

Third Party Advisory

https://census-labs.com/news/category/advisories/

Patch

https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018

Mailing List

https://www.openwall.com/lists/oss-security/2021/02/17/3