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CVE-2017-16227

Date: October 29, 2017

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.

Language: C

Severity Score

Related Resources (10)

https://security-tracker.debian.org/tracker/CVE-2017-16227
https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008
https://nvd.nist.gov/vuln/detail/CVE-2017-16227
https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2017-16227
http://download.savannah.gnu.org/releases/quagga/quagga-1.2.2.changelog.txt
https://access.redhat.com/security/cve/CVE-2017-16227
https://bugs.debian.org/879474
http://www.debian.org/security/2017/dsa-4011
https://www.mend.io/vulnerability-database/CVE-2017-16227

Severity Score

Weakness Type (CWE)

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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