Bug 1626263 – CVE-2018-8409 .NET: Resource loop in ReadAsync when it is being cancelled while producer allocates memory using GetMemory

Bugzilla will be upgraded to version 5.0 on a still to be determined date in the near future. The original upgrade date has been delayed.

Bug 1626263 - (CVE-2018-8409) CVE-2018-8409 .NET: Resource loop in ReadAsync when it is being cancelled while producer allocates memory using GetMemory

Summary:	CVE-2018-8409 .NET: Resource loop in ReadAsync when it is being cancelled whi...

Status:	NEW

Aliases:	CVE-2018-8409

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=low,public=20180911,reported=2...
Keywords:	Security

Depends On:
Blocks:	1626264
	Show dependency tree / graph

Reported:	2018-09-06 17:33 EDT by Pedro Sampaio
Modified:	2018-09-14 05:25 EDT (History)
CC List:	8 users (show)

See Also:
Fixed In Version:
Doc Type:	If docs needed, set a value
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

Groups: None (edit)

Description Pedro Sampaio 2018-09-06 17:33:33 EDT

If ReadAsync is being cancelled while producer allocates memory using GetMemory subsequent ReadAsync calls would never block even if there is no new data available causing a tight loop. ReadAsync would start blocking again when producer calls FlushAsync. Only consumers that do not observe IsCancelled flag on ReadResult are affected. .NET Core ≤ 4.5.0 are believed to be vulnerable.

Comment 3 Sam Fowler 2018-09-13 20:47:57 EDT

Acknowledgments:

Name: Microsoft

Comment 4 Sam Fowler 2018-09-13 20:49:02 EDT

External Reference:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8409

Comment 5 Radka Janek 2018-09-14 05:25:21 EDT

This was shipped and can be closed.

Note You need to log in before you can comment on or make changes to this bug.