Bug 1850598 (CVE-2020-12865)

Summary:	CVE-2020-12865 sane-backends: Heap buffer overflow in esci2_img
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	mike, nphilipp, thibault.north, zdohnal
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	sane-backends 1.0.30	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in sane-backends in versions prior to 1.0.30. A heap buffer overflow in the esci2_img function could lead to a remote code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-07-14 13:27:54 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:	1850602, 1850604, 1852465, 1852466, 1852467, 1852468
Bug Blocks:	1848100

Description Pedro Sampaio 2020-06-24 14:02:56 UTC

A flaw was found in sane-backends before version 1.0.30. A heap buffer overflow in esci2_img function may lead to remote code execution.

Upstream issue:

https://gitlab.com/sane-project/backends/-/issues/279#issue-9-ghsl-2020-084-buffer-overflow-in-esci2_img

References:

https://gitlab.com/sane-project/backends/-/releases

Comment 1 Pedro Sampaio 2020-06-24 14:03:20 UTC

Created mingw-sane-backends tracking bugs for this issue:

Affects: fedora-all [bug 1850604]


Created sane-backends tracking bugs for this issue:

Affects: fedora-all [bug 1850602]

Comment 4 Huzaifa S. Sidhpurwala 2020-06-30 10:47:19 UTC

External References:

https://gitlab.com/sane-project/backends/-/issues/279#issue-9-ghsl-2020-084-buffer-overflow-in-esci2_img

Comment 9 errata-xmlrpc 2020-07-14 09:13:14 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:2902 https://access.redhat.com/errata/RHSA-2020:2902

Comment 10 Product Security DevOps Team 2020-07-14 13:27:54 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-12865

Comment 11 errata-xmlrpc 2020-07-16 07:30:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:2967 https://access.redhat.com/errata/RHSA-2020:2967

Comment 12 errata-xmlrpc 2020-07-21 14:34:22 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:3045 https://access.redhat.com/errata/RHSA-2020:3045

Comment 13 Eric Christensen 2020-08-10 17:58:36 UTC

Statement:

The vulnerable code is a part of "driver for Epson ESC/I-2 scanners" which was first introduced in sane-backends-1.0.25 (via https://gitlab.com/sane-project/backends/-/commit/d72f4663c0ad6e6f779c15c8baf5f92b675ae19a). Therefore, only versions of sane-backends shipped with Red Hat Enterprise Linux 8 are affected by this flaw.

Comment 14 Eric Christensen 2020-08-10 17:58:38 UTC

Mitigation:

This flaw can be mitigated by limiting network scanner discovery to a trusted subnet via the "net" configuration in the "/etc/sane.d/epsonds.conf" configuration file. Also, automatic network scanner discovery can be turned off by commenting out the line "net autodiscovery" in the same configuration file.