Bug 1383972 (CVE-2016-8606)

Summary:	CVE-2016-8606 guile: REPL server vulnerable to HTTP inter-protocol attacks
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jskarvad, jsynacek, mlichvar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	guile 2.0.13	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in guile's REPL server (--listen), making it vulnerable to HTTP inter-protocol attacks. A crafted website, when visited by a developer with an instance of the REPL server, could cause arbitrary code execution within the guile scheme interpreter.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-12-16 05:05:10 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:	1383973, 1383974, 1383975
Bug Blocks:	1383977

Description Andrej Nemec 2016-10-12 09:31:36 UTC

GNU Guile, an implementation of the Scheme language, provides a "REPL server" which is a command prompt that developers can connect to for live coding and debugging purposes. The REPL server is started by the '--listen' command-line option or equivalent API.

It was  reported that the REPL server is vulnerable to the HTTP inter-protocol attack

This constitutes a remote code execution vulnerability for developers running a REPL server that listens on a loopback device or private network. Applications that do not run a REPL server, as is usually the case, are unaffected.

References:

http://seclists.org/oss-sec/2016/q4/100

Upstream patch:

http://git.savannah.gnu.org/cgit/guile.git/commit/?h=stable-2.0&id=08c021916dbd3a235a9f9cc33df4c418c0724e03

Comment 1 Andrej Nemec 2016-10-12 09:33:22 UTC

Created compat-guile18 tracking bugs for this issue:

Affects: fedora-all [bug 1383974]
Affects: epel-7 [bug 1383975]

Comment 2 Andrej Nemec 2016-10-12 09:33:29 UTC

Created guile tracking bugs for this issue:

Affects: fedora-all [bug 1383973]

Comment 3 Miroslav Lichvar 2016-10-12 10:03:41 UTC

It seems the repl server was added in guile-2.0, so the compat-guile18 packages shouldn't be affected.

Comment 4 Doran Moppert 2016-12-16 05:04:39 UTC

Statement:

Red Hat Product Security has rated this issue as having Moderate security
impact. This issue is not currently planned to be addressed in future
updates. For additional information, refer to the Issue Severity
Classification: https://access.redhat.com/security/updates/classification/.