Joined: 13 Jun 2003
Location: Barcelona, Spain
|Posted: Fri Apr 01, 2005 11:35 am Post subject: [ GLSA 200504-01 ] telnet-bsd: Multiple buffer overflows
|Gentoo Linux Security Advisory
Title: telnet-bsd: Multiple buffer overflows (GLSA 200504-01)
Date: April 01, 2005
The telnet-bsd telnet client is vulnerable to two buffer overflows, which could allow a malicious telnet server operator to execute arbitrary code.
telnet-bsd provides a command line telnet client which is used for remote login using the telnet protocol.
Vulnerable: < 1.0-r1
Unaffected: >= 1.0-r1
Architectures: All supported architectures
A buffer overflow has been identified in the env_opt_add() function of telnet-bsd, where a response requiring excessive escaping can cause a heap-based buffer overflow. Another issue has been identified in the slc_add_reply() function, where a large number of SLC commands can overflow a fixed size buffer.
Successful exploitation would require a vulnerable user to connect to an attacker-controlled host using telnet, potentially executing arbitrary code with the permissions of the telnet user.
There is no known workaround at this time.
All telnet-bsd users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/telnet-bsd-1.0-r1"
Last edited by GLSA on Sun May 07, 2006 4:55 pm; edited 1 time in total