Bug 1475514 (CVE-2017-11626)

Summary:	CVE-2017-11626 qpdf: Infinite loop in QPDFTokenizer::resolveLiteral function in QPDFTokenizer.cc
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	jpopelka, twaugh, zdohnal
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:	2019-06-08 03:18:49 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:	1475515, 1475516
Bug Blocks:

Description Pedro Sampaio 2017-07-26 20:00:54 UTC

A stack-consumption vulnerability was found in libqpdf in QPDF 6.0.0, which allows attackers to cause a denial of service via a crafted file, related to the QPDFTokenizer::resolveLiteral function in QPDFTokenizer.cc after four consecutive calls to QPDFObjectHandle::parseInternal, aka an "infinite loop".

Upstream bug:

https://github.com/qpdf/qpdf/issues/119

Upstream patch:

https://github.com/jberkenbilt/qpdf/commit/2f56805a397b4d264bcfdfc248765990084c2933
https://github.com/jberkenbilt/qpdf/commit/97c9344c4b878ddc4723486640688d2d3d38ad32
https://github.com/qpdf/qpdf/commit/ac3c81a8edcb44e2669485630d6718c96a6ad6e9

References:

http://somevulnsofadlab.blogspot.com.br/2017/07/qpdfan-infinite-loop-in-libqpdf_65.html

Comment 1 Pedro Sampaio 2017-07-26 20:01:21 UTC

Created qpdf tracking bugs for this issue:

Affects: epel-6 [bug 1475515]
Affects: fedora-all [bug 1475516]

Comment 2 Zdenek Dohnal 2017-08-01 12:53:12 UTC

Upstream patches from comment#0 add tests for this issue.

Actual upstream patches:

https://github.com/qpdf/qpdf/commit/701b518d5c56a1449825a3a37a716c58e05e1c3e
https://github.com/qpdf/qpdf/commit/afe0242b263a9e1a8d51dd81e42ab6de2e5127eb
https://github.com/qpdf/qpdf/commit/315092dd98d5230ef0efa18b294d464d0e9f79d0
https://github.com/qpdf/qpdf/commit/603f222365252f1a1e20303b3dbe52466be3053b