Bug 1771891 (CVE-2019-18849) - CVE-2019-18849 tnef: security bypass in .ssh/authorized_keys file via an e-mail message
Summary: CVE-2019-18849 tnef: security bypass in .ssh/authorized_keys file via an e-ma...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2019-18849
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: 1771893 1771892
Blocks:
TreeView+ depends on / blocked
 
Reported: 2019-11-13 08:20 UTC by Dhananjay Arunesh
Modified: 2019-11-13 12:51 UTC (History)
1 user (show)

Fixed In Version:
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Environment:
Last Closed: 2019-11-13 12:51:30 UTC


Attachments (Terms of Use)

Description Dhananjay Arunesh 2019-11-13 08:20:06 UTC
In tnef before 1.4.18, an attacker may be able to write to the victim's
.ssh/authorized_keys file via an e-mail message with a crafted winmail.dat
application/ms-tnef attachment, because of a heap-based buffer over-read
involving strdup.

Reference:
https://github.com/verdammelt/tnef/pull/40
https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18

Comment 1 Dhananjay Arunesh 2019-11-13 08:21:10 UTC
Created tnef tracking bugs for this issue:

Affects: fedora-all [bug 1771892]

Comment 2 Dhananjay Arunesh 2019-11-13 08:21:48 UTC
Created tnef tracking bugs for this issue:

Affects: epel-all [bug 1771893]

Comment 3 Product Security DevOps Team 2019-11-13 12:51:30 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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