Bug 1737080 (CVE-2019-10216)

Summary: CVE-2019-10216 ghostscript: -dSAFER escape via .buildfont1 (701394)
Product: [Other] Security Response Reporter: Cedric Buissart <cbuissar>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: chazlett, deekej, mosvald, netanel, sbunciak, security-response-team, twaugh, yozone, zdohnal
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: ghostscript 9.50 Doc Type: If docs needed, set a value
Doc Text:
It was found that the .buildfont1 procedure did not properly secure its privileged calls, enabling scripts to bypass `-dSAFER` restrictions. An attacker could abuse this flaw by creating a specially crafted PostScript file that could escalate privileges and access files outside of restricted areas.
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-08-12 20:47:05 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1737336, 1737337, 1737338, 1737339, 1740198    
Bug Blocks: 1737052    

Description Cedric Buissart 2019-08-02 14:35:48 UTC
The .buildfont1 does not sufficiently protect its environment. A specially crafted PostScript script can override the typecheck error handler to retrieve a reference to .forceput. This can be used to disable -dSAFER and, for example, access files outside of the restricted area.

Comment 4 Cedric Buissart 2019-08-05 11:47:30 UTC

Name: Artifex Software
Upstream: Netanel (Cloudinary)

Comment 5 Cedric Buissart 2019-08-06 07:18:59 UTC

Please refer to the "Mitigation" section of CVE-2018-16509 : https://access.redhat.com/security/cve/cve-2018-16509

Comment 7 Cedric Buissart 2019-08-12 13:04:57 UTC
Created ghostscript tracking bugs for this issue:

Affects: fedora-all [bug 1740198]

Comment 8 errata-xmlrpc 2019-08-12 18:45:14 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:2462 https://access.redhat.com/errata/RHSA-2019:2462

Comment 9 errata-xmlrpc 2019-08-12 19:34:51 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:2465 https://access.redhat.com/errata/RHSA-2019:2465

Comment 10 Product Security DevOps Team 2019-08-12 20:47:05 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


Comment 11 Cedric Buissart 2019-08-13 08:19:37 UTC
Upstream fix :

Comment 14 errata-xmlrpc 2019-08-21 11:45:48 UTC
This issue has been addressed in the following products:

  3scale API Management 2.6

Via RHSA-2019:2534 https://access.redhat.com/errata/RHSA-2019:2534