CVE-2017-16227: Input Validation
First published: Sun Oct 29 2017(Updated: )
The aspath_put function in bgpd/bgp_aspath.c in Quagga before 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDATE messages, because AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Quagga Routing Software Suite | <=1.2.1 | |
| Debian GNU/Linux | =8.0 | |
| Debian GNU/Linux | =9.0 |
Remedy
https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008
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Reference Links
- http://download.savannah.gnu.org/releases/quagga/quagga-1.2.2.changelog.txt
- http://www.debian.org/security/2017/dsa-4011
- https://bugs.debian.org/879474
- https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008
- https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.html
Frequently Asked Questions
What is the severity of CVE-2017-16227?
CVE-2017-16227 is classified as a denial of service vulnerability.
How do I fix CVE-2017-16227?
To fix CVE-2017-16227, upgrade Quagga to version 1.2.2 or later.
What are the affected versions for CVE-2017-16227?
CVE-2017-16227 affects Quagga versions prior to 1.2.2 and specific Debian Linux versions 8.0 and 9.0.
Can CVE-2017-16227 be exploited remotely?
Yes, CVE-2017-16227 can be exploited by remote attackers through specially crafted BGP UPDATE messages.
What type of attack does CVE-2017-16227 facilitate?
CVE-2017-16227 can facilitate a denial of service attack resulting in session drops.
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