Bug 1861068 (CVE-2020-15953)

Summary: CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED UPSTREAM QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: andreas.bierfert, mtasaka, ssorce
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Last Closed: 2020-07-27 19:27:43 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1861071, 1861072    
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Description Guilherme de Almeida Suckevicz 2020-07-27 18:09:32 UTC 
LibEtPan through 1.9.4, as used in MailCore 2 through 0.6.3 and other products, has a STARTTLS buffering issue that affects IMAP, SMTP, and POP3. When a server sends a "begin TLS" response, the client reads additional data (e.g., from a meddler-in-the-middle attacker) and evaluates it in a TLS context, aka "response injection."

Reference:
https://github.com/dinhvh/libetpan/issues/386
Comment 1 Guilherme de Almeida Suckevicz 2020-07-27 18:11:44 UTC 
Created libetpan tracking bugs for this issue:

Affects: epel-6 [bug 1861072]
Affects: fedora-all [bug 1861071]
Comment 2 Product Security DevOps Team 2020-07-27 19:27:43 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.