Otkriveno je nekoliko sigurnosnih propusta u radu programskog paketa libpng. Udaljeni ih napadači mogu iskoristiti za izvođenje DoS napada i prepisivanje memorije.
Paket:
libpng 1.x
Operacijski sustavi:
Mandriva Linux 2010.1, Mandriva Linux Enterprise Server 5.0
Kritičnost:
5
Problem:
pogreška u programskoj funkciji, preljev međuspremnika
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_______________________________________________________________________
Mandriva Linux Security Advisory MDVSA-2011:151
http://www.mandriva.com/security/
_______________________________________________________________________
Package : libpng
Date : October 17, 2011
Affected: 2010.1, Enterprise Server 5.0
_______________________________________________________________________
Problem Description:
Multiple vulnerabilities has been discovered and corrected in libpng:
The png_format_buffer function in pngerror.c in libpng allows
remote attackers to cause a denial of service (application crash)
via a crafted PNG image that triggers an out-of-bounds read during
the copying of error-message data. NOTE: this vulnerability exists
because of a CVE-2004-0421 regression (CVE-2011-2501).
Buffer overflow in libpng, when used by an application that calls the
png_rgb_to_gray function but not the png_set_expand function, allows
remote attackers to overwrite memory with an arbitrary amount of data,
and possibly have unspecified other impact, via a crafted PNG image
(CVE-2011-2690).
The png_err function in pngerror.c in libpng makes a function call
using a NULL pointer argument instead of an empty-string argument,
which allows remote attackers to cause a denial of service (application
crash) via a crafted PNG image (CVE-2011-2691). NOTE: This does not
affect the binary packages in Mandriva, but could affect users if
PNG_NO_ERROR_TEXT is defined using the libpng-source-1.?.?? package.
The png_handle_sCAL function in pngrutil.c in libpng does not properly
handle invalid sCAL chunks, which allows remote attackers to cause
a denial of service (memory corruption and application crash) or
possibly have unspecified other impact via a crafted PNG image that
triggers the reading of uninitialized memory (CVE-2011-2692).
The updated packages have been patched to correct these issues.
_______________________________________________________________________
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2501
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2690
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2691
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2692
_______________________________________________________________________
Updated Packages:
Mandriva Linux 2010.1:
75cf5cc9e56f7cd3c621ea2ba8899df3
2010.1/i586/libpng3-1.2.43-1.2mdv2010.2.i586.rpm
af2f3f6696d67efd19d2bf7cc30207da
2010.1/i586/libpng-devel-1.2.43-1.2mdv2010.2.i586.rpm
5190271f8394e5114aeb3b9de6a679bc
2010.1/i586/libpng-source-1.2.43-1.2mdv2010.2.i586.rpm
3d7b05502fd2c613f6e263c2bc4baf51
2010.1/i586/libpng-static-devel-1.2.43-1.2mdv2010.2.i586.rpm
4d26abf5f53ddfb40af4432b2ffe7215
2010.1/SRPMS/libpng-1.2.43-1.2mdv2010.2.src.rpm
Mandriva Linux 2010.1/X86_64:
3a8041586d3f6a3666231ec9744efa30
2010.1/x86_64/lib64png3-1.2.43-1.2mdv2010.2.x86_64.rpm
3baefc4e0b5f560382ef411349142810
2010.1/x86_64/lib64png-devel-1.2.43-1.2mdv2010.2.x86_64.rpm
63db8d8b4313907f1b7d18ac4cf7c30f
2010.1/x86_64/lib64png-static-devel-1.2.43-1.2mdv2010.2.x86_64.rpm
bb8d9ac1982ae3591e701f1e32193733
2010.1/x86_64/libpng-source-1.2.43-1.2mdv2010.2.x86_64.rpm
4d26abf5f53ddfb40af4432b2ffe7215
2010.1/SRPMS/libpng-1.2.43-1.2mdv2010.2.src.rpm
Mandriva Enterprise Server 5:
2dc72977964282d6b9b71f02daf11875
mes5/i586/libpng3-1.2.31-2.4mdvmes5.2.i586.rpm
3a7a29b3ce673a6023b2ebd69702de77
mes5/i586/libpng-devel-1.2.31-2.4mdvmes5.2.i586.rpm
311e83f11ecca6e10492be05e93af450
mes5/i586/libpng-source-1.2.31-2.4mdvmes5.2.i586.rpm
6e78659cd2132ab936672d26307508c3
mes5/i586/libpng-static-devel-1.2.31-2.4mdvmes5.2.i586.rpm
7716bbc53dbf07a4bcf647d19c872321
mes5/SRPMS/libpng-1.2.31-2.4mdvmes5.2.src.rpm
Mandriva Enterprise Server 5/X86_64:
30fbcd1e778a334751efb67347896a74
mes5/x86_64/lib64png3-1.2.31-2.4mdvmes5.2.x86_64.rpm
98f8b1bcae2ca325b95d84b03a8a21c3
mes5/x86_64/lib64png-devel-1.2.31-2.4mdvmes5.2.x86_64.rpm
8388f578116a05c96b2ef54120b0966a
mes5/x86_64/lib64png-static-devel-1.2.31-2.4mdvmes5.2.x86_64.rpm
e92d9e5a9d2cec26614e0073bf8772a4
mes5/x86_64/libpng-source-1.2.31-2.4mdvmes5.2.x86_64.rpm
7716bbc53dbf07a4bcf647d19c872321
mes5/SRPMS/libpng-1.2.31-2.4mdvmes5.2.src.rpm
_______________________________________________________________________
To upgrade automatically use MandrivaUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
All packages are signed by Mandriva for security. You can obtain the
GPG public key of the Mandriva Security Team by executing:
gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98
You can view other update advisories for Mandriva Linux at:
http://www.mandriva.com/security/advisories
If you want to report vulnerabilities, please contact
security_(at)_mandriva.com
_______________________________________________________________________
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Mandriva Security Team
<security*mandriva.com>
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