Exim Buffer Overflow in base64d() Lets Remote Users Execute Arbitrary Code
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SecurityTracker Alert ID: 1040461 |
SecurityTracker URL: http://securitytracker.com/id/1040461
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CVE Reference:
CVE-2018-6789
(Links to External Site)
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Date: Mar 7 2018
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Impact:
Execution of arbitrary code via network, User access via network
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Fix Available: Yes Vendor Confirmed: Yes
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Version(s): prior to 4.90.1
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Description:
A vulnerability was reported in Exim. A remote user can execute arbitrary code on the target system.
A remote user can send specially crafted SMTP data to trigger a buffer overflow in base64d() and execute arbitrary code on the target system. The code will run with the privileges of the target service.
The original advisory is available at:
https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
Meh Chang, DEVCORE research team, reported this vulnerability.
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Impact:
A remote user can execute arbitrary code on the target system.
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Solution:
The vendor has issued a fix (4.90.1).
The vendor advisory is available at:
https://exim.org/static/doc/security/CVE-2018-6789.txt
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Vendor URL: exim.org/static/doc/security/CVE-2018-6789.txt (Links to External Site)
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Cause:
Boundary error
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Underlying OS: Linux (Any), UNIX (Any)
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Message History:
None.
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Source Message Contents
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Subject: https://exim.org/static/doc/security/CVE-2018-6789.txt
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