CVE-2017-16227

Name: CVE-2017-16227
Creator: NVD / NIST
Published: 2017-10-29T20:29:00.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 18.79%

Last modified Jun 17, 2026

CVE-2017-16227 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 18.79% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

18.79%

96.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Quagga	Quagga	<= 1.2.1
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0

References

http://download.savannah.gnu.org/releases/quagga/quagga-1.2.2.changelog.txtIssue Tracking, Third Party Advisory
http://www.debian.org/security/2017/dsa-4011Issue Tracking, Third Party Advisory
https://bugs.debian.org/879474Issue Tracking, Patch, Third Party Advisory
https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008Issue Tracking, Patch, Third Party Advisory
https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.htmlIssue Tracking, Patch, Third Party Advisory
http://download.savannah.gnu.org/releases/quagga/quagga-1.2.2.changelog.txtIssue Tracking, Third Party Advisory
http://www.debian.org/security/2017/dsa-4011Issue Tracking, Third Party Advisory
https://bugs.debian.org/879474Issue Tracking, Patch, Third Party Advisory
https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008Issue Tracking, Patch, Third Party Advisory
https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.htmlIssue Tracking, Patch, Third Party Advisory

Timeline

Published: Oct 29, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-16227?

How severe is CVE-2017-16227?

Severity scoring for CVE-2017-16227 is pending analysis. The EPSS model estimates a 18.79% probability of exploitation in the next 30 days.

How do I fix CVE-2017-16227?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-16227?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST