CVE-2014-8166: Input Validation
First published: Fri Apr 04 2014(Updated: )
It was reported that ANSI escape sequences could be added to printer names in CUPS. Becaue CUPS has a browsing feature that, when enabled, allows remote hosts to announce shared printers, a malicious host or user could send a specially-crafted UDP packet to a CUPS server announcing an arbitrary printer name that includes ANSI escape sequences. Since the CUPS daemon does not remove these characters, a user on the targeted system could query the printer list (using 'lpstat -a', for example). If this were done in a terminal that supported the ANSI escape sequences (like a terminal with support for color), then code execution could be possible as the terminal would interpret the ANSI escape sequences contained in the printer name.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| CUPS libraries | <1.6 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2015/03/24/15
- http://www.openwall.com/lists/oss-security/2015/03/24/2
- http://www.securityfocus.com/bid/73300
- https://bugzilla.redhat.com/show_bug.cgi?id=1084577
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=916761&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=916761&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1084577#c4
- https://bugs.mageia.org/show_bug.cgi?id=15562
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1084577#c5
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1084577#c7
Frequently Asked Questions
What is the severity of CVE-2014-8166?
CVE-2014-8166 is classified as a medium severity vulnerability.
How do I fix CVE-2014-8166?
To fix CVE-2014-8166, update CUPS to version 1.6 or later.
What type of systems are affected by CVE-2014-8166?
CVE-2014-8166 affects systems running CUPS versions below 1.6.
How can CVE-2014-8166 be exploited?
CVE-2014-8166 can be exploited by a malicious user sending specially-crafted UDP packets to announce arbitrary printer names.
Is CUPS browsing feature related to CVE-2014-8166?
Yes, the vulnerability is related to the CUPS browsing feature that allows remote hosts to announce shared printers.
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