Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

BID:13471

Info

Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

Bugtraq ID: 13471
Class: Design Error
CVE: CVE-2005-0106
Remote: No
Local: Yes
Published: May 03 2005 12:00AM
Updated: Aug 24 2006 10:59PM
Credit: Javier Fernandez-Sanguino Pena is credited with the discovery of this issue.
Vulnerable: Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
Mandriva Linux Mandrake 10.2 x86_64
Mandriva Linux Mandrake 10.2
Mandriva Linux Mandrake 10.1 x86_64
Mandriva Linux Mandrake 10.1
Mandriva Linux Mandrake 10.0 AMD64
Mandriva Linux Mandrake 10.0
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
Joshua Chamas Crypt::SSLeay 0.51
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 Joshua Chamas Crypt::SSLeay 1.25
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
Not Vulnerable:

Discussion

Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

Crypt::SSLeay is prone to a security vulnerability. Reports indicate that the library employs a file from a world-writable location for its fallback entropy source. The module defaults to this file if a proper entropy source is not set.

If the affected library is using the insecure file as a source of entropy, a local attacker may replace the contents of the file with known text. This known text is then employed to seed cryptographic operations. This may lead to weak cryptographic operations.

Exploit / POC

Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

No exploit is required.

Solution / Fix

Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

Solution:

Please see the referenced advisories for further information:

- Ubuntu Linux has released advisory USN-113-1 to address this issue.
- Mandriva has released advisory MDKSA-2006:023 to address this issue.

Currently we are not aware of any vendor-supplied patches 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]:[email protected].


Joshua Chamas Crypt::SSLeay 1.25

Joshua Chamas Crypt::SSLeay 0.51

References

Joshua Chamas Crypt::SSLeay Perl Module Insecure Entropy Source Vulnerability

References:
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