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Last updated: 1/19/2017 7:45:41 AM

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National Cyber Awareness System

Vulnerability Summary for CVE-2016-6580

Original release date: 01/10/2017
Last revised: 01/12/2017
Source: US-CERT/NIST

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

Overview

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targeted by a malicious peer by having that peer assign priority information for every possible HTTP/2 stream ID. The priority tree would happily continue to store the priority information for each stream, and would therefore allocate unbounded amounts of memory. Attempting to actually use a tree like this would also cause extremely high CPU usage to maintain the tree.

Impact

CVSS Severity (version 3.0):
CVSS v3 Base Score: 7.5 High
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 3.9
CVSS Version 3 Metrics:
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 Severity (version 2.0):
CVSS v2 Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows disruption of service

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External Source: CONFIRM
Name: https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html
Type: Mitigation; Vendor Advisory
Hyperlink: https://python-hyper.org/priority/en/latest/security/CVE-2016-6580.html
External Source: BID
Name: 92311
Type: Third Party Advisory; VDB Entry
Hyperlink: http://www.securityfocus.com/bid/92311

Technical Details

Vulnerability Type (View All)
  • Resource Management Errors (CWE-399)
CVE Standard Vulnerability Entry http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-6580

Change History 2 change records found - show changes