Bug 1790288 (CVE-2020-6750)

Summary:	CVE-2020-6750 glib: Mishandling of proxy_addr field in GSocketClient may lead to proxy being ignored
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	caillon+fedoraproject, erack, erik-fedora, fedora, fidencio, gecko-bugs-nobody, gnome-sig, jhorak, john.j5live, klember, manisandro, marcandre.lureau, mclasen, pahan, paul, rdieter, rh-spice-bugs, rhughes, rjones, rstrode, sandmann, stransky, tiagomatos, walters
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:	2020-01-14 12:28:41 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:	1790289, 1790866
Bug Blocks:	1790291

Description Pedro Sampaio 2020-01-13 02:59:35 UTC

GSocketClient in GNOME GLib through 2.62.4 may occasionally connect directly to a target address instead of connecting via a proxy server when configured to do so, because the proxy_addr field is mishandled. This bug is timing-dependent and may occur only sporadically depending on network delays. The greatest security relevance is in use cases where a proxy is used to help with privacy/anonymity, even though there is no technical barrier to a direct connection. NOTE: versions before 2.60 are unaffected.

Upstream issue:

https://gitlab.gnome.org/GNOME/glib/issues/1989

References:

https://bugzilla.suse.com/show_bug.cgi?id=1160668

Comment 1 Pedro Sampaio 2020-01-13 03:00:05 UTC

Created mingw-glib2 tracking bugs for this issue:

Affects: epel-7 [bug 1790290]
Affects: fedora-all [bug 1790289]

Comment 2 Huzaifa S. Sidhpurwala 2020-01-14 12:22:10 UTC

Created glib2 tracking bugs for this issue:

Affects: fedora-all [bug 1790866]

Comment 3 Huzaifa S. Sidhpurwala 2020-01-14 12:28:46 UTC

Statement:

As per upstream versions of glib2 before 2.60 are unaffected, therefore glib2 package shipped with Red Hat Products are not affected by this flaw.

Comment 5 msiddiqu 2020-02-11 09:06:07 UTC

Upstream merge request:

https://gitlab.gnome.org/GNOME/glib/merge_requests/1339.patch