PHP4 Base64_Encode() Integer Overflow Vulnerability

BID:8693

Info

PHP4 Base64_Encode() Integer Overflow Vulnerability

Bugtraq ID: 8693
Class: Boundary Condition Error
CVE:
Remote: Yes
Local: No
Published: Aug 25 2003 12:00AM
Updated: Aug 25 2003 12:00AM
Credit: Discovery of this vulnerability has been credited to Moriyoshi.
Vulnerable: PHP PHP 4.3.2
PHP PHP 4.3.1
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ OpenPKG OpenPKG Current
 + S.u.S.E. Linux Personal 8.2
PHP PHP 4.3
PHP PHP 4.2.3
+ EnGarde Secure Linux 1.0.1
+ MandrakeSoft Corporate Server 2.1 x86_64
 + MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.0
+ Turbolinux Turbolinux Server 8.0
+ Turbolinux Turbolinux Server 7.0
+ Turbolinux Turbolinux Workstation 8.0
+ Turbolinux Turbolinux Workstation 7.0
PHP PHP 4.2.2
+ Gentoo Linux 1.4 _rc1
 + Gentoo Linux 1.2
+ OpenPKG OpenPKG 1.1
+ Redhat Linux 8.0 i386
 + Redhat Linux 8.0
+ SuSE Linux 8.1
PHP PHP 4.2.1
- FreeBSD FreeBSD 4.6
- FreeBSD FreeBSD 4.5
- FreeBSD FreeBSD 4.4
- FreeBSD FreeBSD 4.3
+ Slackware Linux 8.1
PHP PHP 4.2 .0
PHP PHP 4.2 -dev
PHP PHP 4.1.2
+ Apple Mac OS X 10.1.5
+ Apple Mac OS X 10.1.4
+ Apple Mac OS X 10.1.3
+ Apple Mac OS X 10.1.2
+ Apple Mac OS X 10.1.1
+ Apple Mac OS X 10.1
+ Apple Mac OS X 10.1
+ Apple Mac OS X 10.0.4
+ Apple Mac OS X 10.0.3
+ Apple Mac OS X 10.0.2
+ Apple Mac OS X 10.0.1
+ Apple Mac OS X 10.0
+ Debian Linux 3.0 sparc
 + Debian Linux 3.0 s/390
 + Debian Linux 3.0 ppc
 + Debian Linux 3.0 mipsel
 + Debian Linux 3.0 mips
 + Debian Linux 3.0 m68k
 + Debian Linux 3.0 ia-64
 + Debian Linux 3.0 ia-32
 + Debian Linux 3.0 hppa
 + Debian Linux 3.0 arm
 + Debian Linux 3.0 alpha
 + MandrakeSoft Multi Network Firewall 2.0
+ MandrakeSoft Single Network Firewall 7.2
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
PHP PHP 4.1.1
PHP PHP 4.1 .0
+ SuSE Linux 8.0 i386
 + SuSE Linux 8.0
PHP PHP 4.0.7 RC3
PHP PHP 4.0.7 RC2
PHP PHP 4.0.7 RC1
PHP PHP 4.0.7
PHP PHP 4.0.6
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Server 3.1
+ Caldera OpenLinux Workstation 3.1.1
+ Caldera OpenLinux Workstation 3.1
+ HP Secure OS software for Linux 1.0
- IBM AIX 4.3.3
- IBM AIX 4.3.2
- IBM AIX 4.3.1
- IBM AIX 4.3
- IBM AIX 5.1
 + MandrakeSoft Corporate Server 1.0.1
+ Mandriva Linux Mandrake 8.1 ia64
 + Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
+ Mandriva Linux Mandrake 7.2
+ Mandriva Linux Mandrake 7.1
+ Redhat Linux 7.2 ia64
 + Redhat Linux 7.2 i386
 + Redhat Linux 7.2
+ Redhat Linux 7.1 ia64
 + Redhat Linux 7.1 i386
 + Redhat Linux 7.1 alpha
 + Redhat Linux 7.1
+ Redhat Linux 7.0 i386
 + Redhat Linux 7.0 alpha
 + Redhat Linux 7.0
+ Sun Cobalt RaQ 550
+ Sun LX50
+ SuSE Linux 7.3 sparc
 + SuSE Linux 7.3 ppc
 + SuSE Linux 7.3 i386
 + SuSE Linux 7.3
+ SuSE Linux 7.2 i386
 + SuSE Linux 7.2
+ Trustix Secure Linux 1.5
PHP PHP 4.0.5
PHP PHP 4.0.4
+ Compaq Compaq Secure Web Server PHP 1.0
+ Guardian Digital Engarde Secure Linux 1.0.1
+ SuSE Linux 7.2
+ SuSE Linux 7.1 x86
 + SuSE Linux 7.1 sparc
 + SuSE Linux 7.1 ppc
 + SuSE Linux 7.1 alpha
 + SuSE Linux 7.1
+ SuSE Linux 7.0 sparc
 + SuSE Linux 7.0 ppc
 + SuSE Linux 7.0 i386
 + SuSE Linux 7.0 alpha
 + SuSE Linux 7.0
PHP PHP 4.0.3 pl1
+ SuSE Linux 6.4 ppc
 + SuSE Linux 6.4 i386
 + SuSE Linux 6.4 alpha
 + SuSE Linux 6.4
PHP PHP 4.0.3
+ Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 IA-32
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ Sun Cobalt Control Station 4100CS
+ Sun Cobalt Qube3 Japanese 4000WGJ
+ Sun Cobalt Qube3 Japanese w/ Caching and RAID 4100WGJ
+ Sun Cobalt Qube3 Japanese w/Caching 4010WGJ
+ Sun Cobalt RaQ XTR 3500R
+ Sun Cobalt RaQ XTR Japanese 3500R-ja
PHP PHP 4.0.2
PHP PHP 4.0.1 pl2
PHP PHP 4.0.1 pl1
PHP PHP 4.0.1
+ Sun Cobalt Qube3 4000WG
+ Sun Cobalt Qube3 w/ Caching and RAID 4100WG
+ Sun Cobalt Qube3 w/Caching 4010WG
+ Sun Cobalt RaQ4 3001R
+ Sun Cobalt RaQ4 Japanese RAID 3100R-ja
+ Sun Cobalt RaQ4 RAID 3100R
PHP PHP 4.0 0
Not Vulnerable: PHP PHP 4.3.3
+ S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ Turbolinux Home
+ Turbolinux Turbolinux 10 F...
 + Turbolinux Turbolinux Desktop 10.0

Discussion

PHP4 Base64_Encode() Integer Overflow Vulnerability

PHP4 has been reported prone to a potential integer overflow vulnerability.

The issue is reported to present itself in the base64_encode() function that is distributed as part of the PHP4 API. Although unconfirmed it has been conjectured that this issue may be due to an unsigned integer value wrapping to a value of zero. This value may then be used in boundary controls, or in arithmetic that may potentially influence execution flow or result in the corruption of sensitive regions of memory.

It is currently unknown whether this condition is exploitable or not.

Exploit / POC

PHP4 Base64_Encode() Integer Overflow Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

PHP4 Base64_Encode() Integer Overflow Vulnerability

Solution:
Conectiva has released an advisory(CLA-2003:749) to address this issue. Affected users are advised to download and apply relevant fixes as soon as possible. Further details relating to obtaining and applying fixes can be found in the referenced advisory.

The vendor has released an upgrade to address this issue:


PHP PHP 4.0 0

PHP PHP 4.0.1

PHP PHP 4.0.1 pl1

PHP PHP 4.0.1 pl2

PHP PHP 4.0.2

PHP PHP 4.0.3 pl1

PHP PHP 4.0.3

PHP PHP 4.0.4

PHP PHP 4.0.5

PHP PHP 4.0.6

PHP PHP 4.0.7 RC2

PHP PHP 4.0.7 RC1

PHP PHP 4.0.7 RC3

PHP PHP 4.0.7

PHP PHP 4.1 .0

PHP PHP 4.1.1

PHP PHP 4.1.2

PHP PHP 4.2 -dev

PHP PHP 4.2 .0

PHP PHP 4.2.1

PHP PHP 4.2.2

PHP PHP 4.2.3

PHP PHP 4.3

PHP PHP 4.3.1

PHP PHP 4.3.2

References

PHP4 Base64_Encode() Integer Overflow Vulnerability

References:

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