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TITLE:
Evince dvi-backend Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA42769

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/42769/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=42769

RELEASE DATE:
2011-01-06

DISCUSS ADVISORY:
http://secunia.com/advisories/42769/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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 * Impact
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http://secunia.com/advisories/42769/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=42769

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
Some vulnerabilities have been reported in Evince, which can be
exploited by malicious people to compromise a user's system.

1) An array indexing error when parsing PK font files within the
"pk_load_font()" function in backend/dvi/mdvi-lib/pk.c can be
exploited to corrupt memory by tricking the user into opening or
previewing a specially crafted DVI file.

2) An array indexing error when parsing VF font files within the
"vf_load_font()" function in backend/dvi/mdvi-lib/vf.c can be
exploited to corrupt memory by tricking the user into opening or
previewing a specially crafted DVI file.

3) A boundary error when parsing AFM font files within the "token()"
function in backend/dvi/mdvi-lib/afmparse.c can be exploited to cause
a heap-based buffer overflow by tricking the user into opening or
previewing a specially crafted DVI file.

4) An integer overflow error when parsing TFM font files within the
"tfm_load_file()" function in backend/dvi/mdvi-lib/tfmfile.c can be
exploited to corrupt memory by tricking the user into opening or
previewing a specially crafted DVI file.

Successful exploitation of the vulnerabilities may allow execution of
arbitrary code.

SOLUTION:
Fixed in the GIT repository.

Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Jon Larimer, IBM X-Force.

ORIGINAL ADVISORY:
http://git.gnome.org/browse/evince/commit/?id=d4139205b010ed06310d14284e63114e88ec6de2
https://bugzilla.redhat.com/show_bug.cgi?id=666313
https://bugzilla.redhat.com/show_bug.cgi?id=666314
https://bugzilla.redhat.com/show_bug.cgi?id=666318
https://bugzilla.redhat.com/show_bug.cgi?id=666321

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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