Bug 2486407 (CVE-2020-37248) - CVE-2020-37248 offlineimap: OfflineIMAP: Information disclosure via man-in-the-middle attack due to insecure STARTTLS handling
Summary: CVE-2020-37248 offlineimap: OfflineIMAP: Information disclosure via man-in-th...
Keywords:
Status: NEW
Alias: CVE-2020-37248
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2486519 2486520
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-08 16:02 UTC by OSIDB Bzimport
Modified: 2026-06-08 18:46 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-06-08 16:02:31 UTC 
OfflineIMAP before 8.0.3 trusts the server with their STARTTLS capability prior to authentication, which allows STRIPTLS/man-in-the-middle attacks, taking over the connection and extracting account credentials in cleartext.
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