Bug 1797595 (CVE-2020-7247)

Summary:	CVE-2020-7247 opensmtpd: arbitrary commands execution in smtp_mailaddr in smtp_session.c via crafted SMTP session
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	denis
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2020-02-03 14:09:36 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1797596, 1797597
Bug Blocks:

Description Dhananjay Arunesh 2020-02-03 13:34:38 UTC

A vulnerability was found in smtp_mailaddr in smtp_session.c in OpenSMTPD 6.6, as used in OpenBSD 6.6 and other products, allows remote attackers to execute arbitrary commands as root via a crafted SMTP session, as demonstrated by shell metacharacters in a MAIL FROM field. This affects the "uncommented" default configuration. The issue exists because of an incorrect return value upon failure of input validation.

Reference:
https://seclists.org/fulldisclosure/2020/Jan/49
https://www.openwall.com/lists/oss-security/2020/01/28/3
https://github.com/openbsd/src/commit/9dcfda045474d8903224d175907bfc29761dcb45

Comment 1 Dhananjay Arunesh 2020-02-03 13:35:57 UTC

Created opensmtpd tracking bugs for this issue:

Affects: epel-all [bug 1797597]
Affects: fedora-all [bug 1797596]

Comment 2 Product Security DevOps Team 2020-02-03 14:09:36 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.