Bug 1899502 (CVE-2020-13988)

Summary:	CVE-2020-13988 Open-iSCSI: counter wraparound resulting in infinite loop
Product:	[Other] Security Response	Reporter:	Cedric Buissart <cbuissar>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	andy, cleech, coughlan, dlehman, security-response-team, yozone
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-29 06:56:31 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1899975, 1899976, 1909057, 1910570
Bug Blocks:	1881303

Description Cedric Buissart 2020-11-19 12:33:45 UTC

Input validity was not checked in uIP (Micro IP) IPv4 TCP options parsing.

The function that parses the TCP MSS option does not check the validity of the length field of this option, allowing attackers to put it into an infinite loop, when arbitrary TCP MSS values are supplied.

listed potential impact: DoS by infinite loop

Comment 2 Cedric Buissart 2020-12-10 10:32:36 UTC

External References:

https://www.forescout.com/company/resources/amnesia33-how-tcp-ip-stacks-breed-critical-vulnerabilities-in-iot-ot-and-it-devices/

Comment 3 Cedric Buissart 2020-12-10 16:27:10 UTC

In Red Hat Enterprise Linux, uIP is used in the iscsiuio command, provided by iscsi-initiator-utils.

In RHEL, the command is used for connecting to an iSCSI NAS. It is expected that the attacker is a Person in the Middle, between the NAS and the RHEL machine.
As a consequence, this issue is currently rated Low.

Comment 4 Cedric Buissart 2020-12-18 09:10:57 UTC

Created iscsi-initiator-utils tracking bugs for this issue:

Affects: fedora-all [bug 1909057]