VDB-95119 · CVE-2016-6580 · BID 92311

Python Priority Library up to 1.1.x HTTP/2 resource management

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Python Priority Library up to 1.1.x and classified as problematic. This affects an unknown part of the component HTTP/2. This manipulation causes resource management. The identification of this vulnerability is CVE-2016-6580. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Python Priority Library up to 1.1.x (Software Library). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component HTTP/2. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect availability. The summary by CVE is:

A HTTP/2 implementation built using any version of the Python priority library prior to version 1.2.0 could be targetted 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.

The bug was discovered 08/04/2016. The weakness was shared 01/10/2017 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is known as CVE-2016-6580 since 08/03/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 159 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.2.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92311†). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Python Priority Library 1.2.0

Timelineinfo

08/03/2016 🔍
08/04/2016 +1 days 🔍
08/04/2016 +0 days 🔍
01/10/2017 +159 days 🔍
01/10/2017 +0 days 🔍
01/11/2017 +1 days 🔍
04/20/2025 +3021 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-6580 (🔍)
GCVE (CVE): GCVE-0-2016-6580
GCVE (VulDB): GCVE-100-95119
SecurityFocus: 92311 - Python priority CVE-2016-6580 Remote Denial of Service Vulnerability

Entryinfo

Created: 01/11/2017 09:36
Updated: 04/20/2025 14:23
Changes: 01/11/2017 09:36 (61), 07/17/2020 10:16 (3), 04/20/2025 14:23 (20)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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