Bug 1862125 (CVE-2020-16117) - CVE-2020-16117 evolution-data-server: NULL pointer dereference related to imapx_free_capability and imapx_connect_to_server
Summary: CVE-2020-16117 evolution-data-server: NULL pointer dereference related to ima...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-16117
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1862127 1862402 1862403
Blocks: 1862128
TreeView+ depends on / blocked
 
Reported: 2020-07-30 14:03 UTC by Pedro Sampaio
Modified: 2021-05-18 14:45 UTC (History)
6 users (show)

Fixed In Version: evolution-data-server 3.35.91
Doc Type: If docs needed, set a value
Doc Text:
A NULL pointer dereference flaw was found in the GNOME evolution-data-server when a mail client parses invalid messages from a malicious server. This flaw allows an attacker who controls a mail server the ability to crash the mail clients. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2021-05-18 14:35:11 UTC
Embargoed:

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Description Pedro Sampaio 2020-07-30 14:03:23 UTC 
In GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server.

Upstream patch:

https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/2cc39592b532cf0dc994fd3694b8e6bf924c9ab5
https://gitlab.gnome.org/GNOME/evolution-data-server/-/commit/627c3cdbfd077e59aa288c85ff8272950577f1d7

Upstream issue:

https://gitlab.gnome.org/GNOME/evolution-data-server/-/issues/189
Comment 1 Pedro Sampaio 2020-07-30 14:03:57 UTC 
Created evolution-data-server tracking bugs for this issue:

Affects: fedora-all [bug 1862127]
Comment 2 Milan Crha 2020-07-30 15:01:15 UTC 
(In reply to Pedro Sampaio from comment #1)
> Affects: fedora-all [bug 1862127]

This is not accurate, the Fedora 32 contains evolution-data-server 3.36.4, which does contain the fix (as it's after 3.35.91 and from the same base branch). Similarly for Fedora 33 (rawhide) with 3.37.3 at the moment. The only affected is Fedora 31, with evolution-data-server 3.34.4.
Comment 5 Riccardo Schirone 2020-07-31 11:06:43 UTC 
Statement:

The flaw requires a malicious server and it can at most make the client application crash, without additional damage to the client's data or system.
Comment 8 Product Security DevOps Team 2021-05-18 14:35:11 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-16117
Comment 9 errata-xmlrpc 2021-05-18 14:45:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1752 https://access.redhat.com/errata/RHSA-2021:1752
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