Bug 1545283 – CVE-2017-18185 qpdf: large heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc

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Bug 1545283 - (CVE-2017-18185) CVE-2017-18185 qpdf: large heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc

Summary:	CVE-2017-18185 qpdf: large heap-based out-of-bounds read in the Pl_Buffer::wr...

Status:	NEW

Aliases:	CVE-2017-18185

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
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URL:
Whiteboard:	impact=low,public=20170827,reported=2...
Keywords:	Security

Depends On:	1554716 1554717
Blocks:	1545293
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Reported:	2018-02-14 09:29 EST by Laura Pardo
Modified:	2018-03-29 18:05 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	qpdf 7.1.1
Doc Type:	If docs needed, set a value
Doc Text:	An integer overflow flaw leading to heap-based out-of-bounds read was found in the way QPDF parsed PDF files. An attacker could potentially use this flaw to crash QPDF by tricking it into processing crafted QPDF files.
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RHEL 7.3 requirements from Atomic Host:
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Description Laura Pardo 2018-02-14 09:29:14 EST

A flaw was found in QPDF before 7.0.0. There is a large heap-based out-of-bounds read in the Pl_Buffer::write function in Pl_Buffer.cc. It is caused by an integer overflow in the PNG filter. This allows an attacker to cause a denial of service via a crafted file.

External References:

https://github.com/qpdf/qpdf/issues/150

Upstream Patch(es):

https://github.com/qpdf/qpdf/commit/ec7d74a386c0b2f38990079c3b0d2a2b30be0e71
https://github.com/qpdf/qpdf/commit/6d46346eb93d5032c08cf1e39023b5d57260a766
https://github.com/qpdf/qpdf/commit/1868a10f8b06631362618bfc85ca8646da4b4b71

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