VulnerabilityModified

CVE-2021-26911

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

HIGH 7.4EPSS 1.09%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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

CVSS 3.1: 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS: 1.09% probability · 63th percentile
CISA KEV: Not listed
Weakness: CWE-295
Affected: canarymail/canary mail · libmailcore/mailcore2
Source: cve@mitre.org

References

http://www.openwall.com/lists/oss-security/2021/02/17/3Mailing List, Patch, Third Party Advisory
https://apps.apple.com/us/app/canary-mail/id1236045954Product, Third Party Advisory
https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/Exploit, Third Party Advisory
https://census-labs.com/news/category/advisories/Third Party Advisory
https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/17/3Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/17/3Mailing List, Patch, Third Party Advisory
https://apps.apple.com/us/app/canary-mail/id1236045954Product, Third Party Advisory
https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/Exploit, Third Party Advisory
https://census-labs.com/news/category/advisories/Third Party Advisory
https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/17/3Mailing List, Patch, Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.