Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Sign up!
EnGarde Community
What is the most important Linux security technology?
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Latest Newsletters
Linux Advisory Watch: March 27th, 2015
Linux Security Week: March 23rd, 2015
LinuxSecurity Newsletters
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

Gentoo: libmcrypt buffer overflow vulnerabilities Print E-mail
User Rating:      How can I rate this item?
Posted by Team   
Gentoo limbcrypt versions prior to 2.5.5 contain a number of buffer overflow vulnerabilities that stem from imporper or lacking input validation.

- --------------------------------------------------------------------
- --------------------------------------------------------------------

PACKAGE : libmcrypt
SUMMARY : buffer overflows and memory exhaustion
DATE    : 2003-01-05 12:01 UTC
EXPLOIT : remote

- --------------------------------------------------------------------

Post by Ilia Alshanetsky <>:

"limbcrypt versions prior to 2.5.5 contain a number of buffer
overflow vulnerabilities that stem from imporper or lacking input
validation. By  passing a longer then expected input to a number of
functions (multiple functions are affected) the user can successful
make libmcrypt crash.

Another vulnerability is due to the way libmcrypt loads algorithms via
libtool. When the algorithms are loaded dynamically the each time the
algorithm is loaded a small (few kilobytes) of memory are leaked. In a
persistant enviroment (web server) this could lead to a memory
exhaustion attack that will exhaust all avaliable memory by launching
repeated requests at an application utilizing the mcrypt library.

The solution to both of these problem is to upgrade to the latest
release of libmcrypt, 2.5.5."


It is recommended that all Gentoo Linux users who are running
dev-libs/libmcrypt-2.5.1-r4 or earlier update their systems as

emerge rsync
emerge libmcrypt
emerge clean

- -------------------------------------------------------------------- - GnuPG key is available at
- --------------------------------------------------------------------

< Prev   Next >


Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
FBI Quietly Removes Recommendation To Encrypt Your Phone
And the prize for LEAST SECURE BROWSER goes to ... Chrome!
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2015 Guardian Digital, Inc. All rights reserved.