Bug 425921 (CVE-2007-6353)

Summary:	CVE-2007-6353 exiv2: integer overflow in EXIF parsing
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rdieter
Target Milestone:	---	Keywords:	Patch, Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-6353
Whiteboard:
Fixed In Version:	0.15-5.fc7	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-12-20 20:10:42 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:	425922, 425923, 425924, 425993, 426001
Bug Blocks:

Description Tomas Hoger 2007-12-17 09:07:12 UTC

Meder Kydyraliev reported an integer overflow exiv2's EXIF parsing code
resulting in heap buffer oveflow.  This can possibly lead to code execution as
user running application using exiv2 library to extract EXIF tags from
malicious image files.

Upstream commit:
http://dev.robotbattle.com/~cvsuser/cgi-bin/ns_viewcvs.cgi/exiv2/trunk/src/exif.cpp?rev=1346&r1=1231&r2=1346

Comment 1 Rex Dieter 2007-12-17 14:32:12 UTC

This is (apparently, can't see it yet), the upstream issue tracker:
http://dev.robotbattle.com/bugs/view.php?id=534

Comment 2 Tomas Hoger 2007-12-17 14:49:56 UTC

(In reply to comment #1)
> http://dev.robotbattle.com/bugs/view.php?id=534

Yes it is.  That report was first opened as public and it also contained further
details about similar problems in other EXIF parsing libraries (see e.g. our
bugs #425551 and #425561 for libexif).

Comment 3 Tomas Hoger 2007-12-17 14:52:36 UTC

Gentoo bug states that exiv2 did not compile because of incorrect static casts
used in the upstream patch.  They've added extra correction:

diff -u exiv2-0.13/src/exif.cpp exiv2-0.13/src/exif.cpp
--- exiv2-0.13/src/exif.cpp
+++ exiv2-0.13/src/exif.cpp
@@ -244,7 +244,7 @@
             uint32_t size = sizes->toLong(i);
             lastSize = size;
             if (   size > 0xffffffff - offset
-                || static_cast(len) < offset + size) {
+                || static_cast<uint32_t>(len) < offset + size) {
                 return 2;
             }
             memcpy(stripsBuf.pData_ + currentOffset, buf + offset, size);
@@ -313,7 +313,7 @@
         if (length == exifData.end()) return 1;
         uint32_t size = length->toLong();
         if (   size > 0xffffffff - offset
-            || static_cast(len) < offset + size) {
+            || static_cast<uint32_t>(len) < offset + size) {
             return 2;
         }
         format->setDataArea(buf + offset, size);

http://bugs.gentoo.org/show_bug.cgi?id=202351

Comment 4 Rex Dieter 2007-12-17 16:40:36 UTC

Thanks.

Comment 5 Fedora Update System 2007-12-20 20:10:40 UTC

exiv2-0.15-5.fc7 has been pushed to the Fedora 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2007-12-20 20:14:41 UTC

exiv2-0.15-5.fc8 has been pushed to the Fedora 8 stable repository.  If problems still persist, please make note of it in this bug report.