Bug 1861068 (CVE-2020-15953) - CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
Summary: CVE-2020-15953 libetpan: response injection via STARTTLS in IMAP
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-15953
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1861071 1861072
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-07-27 18:09 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-07-27 19:27 UTC (History)
3 users (show)

Fixed In Version:
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Environment:
Last Closed: 2020-07-27 19:27:43 UTC


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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.


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