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TITLE:
libexif Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA49857

VERIFY ADVISORY:
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http://secunia.com/advisories/49857/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=49857

RELEASE DATE:
2012-07-13

DISCUSS ADVISORY:
http://secunia.com/advisories/49857/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/49857/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=49857

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DESCRIPTION:
Multiple vulnerabilities have been reported in libexif, which can be
exploited by malicious people to disclose certain sensitive
information, cause a DoS (Denial of Service), and compromise an
application using the library.

1) An out-of-bounds read error within the "exif_entry_get_value()"
function (libexif/exif-entry.c) when handling the EXIF_TAG_COPYRIGHT
tag can be exploited to cause a crash or disclose process memory.

2) An out-of-bounds read error within the
"exif_convert_utf16_to_utf8()" function (libexif/exif-entry.c) when
handling UTF16 encoded images can be exploited to cause a crash or
disclose process memory.

3) Some errors within the "exif_entry_format_value()" function
(libexif/exif-entry.c) when handling EXIF tags can be exploited to
cause buffer overflows.

4) An integer overflow error within the "exif_data_load_data()"
function (libexif/exif-data.c) when parsing certain headers can be
exploited to cause a buffer overflow.

5) A divide-by-zero error within the
"mnote_olympus_entry_get_value()" function
(libexif/olympus/mnote-olympus-entry.c) when parsing image color
information can be exploited to cause a crash.

6) An off-by-one error within the "exif_convert_utf16_to_utf8()"
function (libexif/exif-utils.c) handling UTF16 encoded images can be
exploited to corrupt memory.

7) An integer overflow error within the "exif_entry_get_value()"
function (libexif/exif-entry.c) can be exploited to cause a buffer
overflow.

8) An integer overflow error within the "jpeg_data_load_data()"
function can be exploited to cause a buffer overflow.

Successful exploitation of vulnerabilities #3, #4, #6, #7, and #8 may
allow execution of arbitrary code.

The vulnerabilities are reported in versions prior to 0.6.21.

SOLUTION:
Update to version 0.6.21.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
1, 2, 3) Mateusz Jurczyk, Google Security Team
4, 5) Yunho Kim 
6, 7, 8) Dan Fandrich

ORIGINAL ADVISORY:
http://sourceforge.net/mailarchive/message.php?msg_id=29534027

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
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EXTENDED DESCRIPTION:
Further details available in Customer Area:
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EXTENDED SOLUTION:
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EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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