CVE-2020-7957: Dovecot: Specially crafted mail can crash snippet generation

                							

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CVE-2020-7957: Dovecot: Specially crafted mail can crash snippet generation

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From: Aki Tuomi &lt;aki.tuomi () dovecot fi&gt;

Date: Wed, 12 Feb 2020 14:05:37 +0200

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Open-Xchange Security Advisory 2020-02-12

Affected product: Dovecot Core
Internal reference: DOV-3743 (JIRA ID)
Vulnerability type: Improper Input Validation (CWE-30)
Vulnerable version: 2.3.9
Vulnerable component: lmtp, imap
Fixed version: 2.3.9.3
Report confidence: Confirmed
Solution status: Fixed
Researcher credits: Open-Xchange oy
Vendor notification: 2020-01-14
CVE reference: CVE-2020-7957
CVSS: 3.1 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L)

Vulnerability Details:

Snippet generation crashes if:

&nbsp;&nbsp;&nbsp;&nbsp; message is large enough that message-parser returns multiple body
blocks
&nbsp;&nbsp;&nbsp; The first block(s) don't contain the full snippet (e.g. full of
whitespace)
&nbsp;&nbsp;&nbsp; input ends with '&gt;'

Risk:

Sending specially crafted email can cause mailbox to have permanently
unaccessible mail, or the mail can be stuck in delivery.

Solution:

Upgrade to 2.3.9.3

Attachment:
signature.asc
Description: OpenPGP digital signature

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CVE-2020-7957: Dovecot: Specially crafted mail can crash snippet generation Aki Tuomi (Feb 12)

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