CVE-2017-9471
First published: Wed Jun 07 2017(Updated: )
In ytnef 1.9.2, the SwapWord function in lib/ytnef.c allows remote attackers to cause a denial of service (heap-based buffer over-read and application crash) via a crafted file.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/libytnef | <1.5-6ubuntu0.2 | 1.5-6ubuntu0.2 |
| ubuntu/libytnef | <1.9.3-1 | 1.9.3-1 |
| debian/libytnef | 1.9.3-1 1.9.3-3 2.0-1 2.1.2-1 | |
| ytnef | =1.9.2 | |
| Ubuntu | =14.04 |
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Reference Links
- https://blogs.gentoo.org/ago/2017/05/24/ytnef-heap-based-buffer-overflow-in-swapword-ytnef-c/
- https://usn.ubuntu.com/3667-1/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
- https://launchpad.net/bugs/cve/CVE-2017-9471
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFJWMUEUC4ILH2HEOCYVVLQT654ZMCGQ/
- https://github.com/Yeraze/ytnef/issues/39
- https://security-tracker.debian.org/tracker/CVE-2017-9471
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9471
- https://ubuntu.com/security/notices/USN-3667-1
- https://nvd.nist.gov/vuln/detail/CVE-2017-9471
- https://github.com/Yeraze/ytnef/pull/56/commits/01fdb170339e60a59a2d247edca95cce646fa4d7
- https://ubuntu.com/security/CVE-2017-9471
Frequently Asked Questions
What is the severity of CVE-2017-9471?
CVE-2017-9471 is classified as a denial of service vulnerability that can lead to application crashes.
How do I fix CVE-2017-9471?
To fix CVE-2017-9471, update the libytnef package to version 1.9.3-1 or higher.
What software is affected by CVE-2017-9471?
CVE-2017-9471 affects ytnef version 1.9.2 and various versions of the libytnef package on Ubuntu and Debian systems.
What type of attacks can exploit CVE-2017-9471?
CVE-2017-9471 can be exploited by attackers through crafted files that trigger heap-based buffer over-read.
Is there an impact on user data due to CVE-2017-9471?
CVE-2017-9471 primarily results in service disruption but does not directly compromise user data.
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