🛡️ CVE-2016-6580 — priority

⚪ Unknown ✅ No Known Exploit CWE-770 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

priority vulnerable to denial of service

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2016-6580 is classified as CWE-770: Allocation of Resources Without Limits. Resources are allocated on request with no cap, so a client can exhaust them.

Affected software

CVE-2016-6580 is recorded against 1 package.

  • priority (fixed in 1.2.0)

Timeline and source

Published on 17 May 2022 and last revised on 30 August 2024. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
github.com (Package)
python-hyper.org (Web)
web.archive.org (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
CWE CWE-770
Public Exploit ✅ No
Source OSV
Published 2022-05-17
Updated 2026-08-12
Modified 2024-08-30
Fix URL N/A

Affected Packages

Software From version Fixed in
priority — 1.2.0

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