Joe Text Editor DEADJOE Symbolic Link Vulnerability

BID:1959

Info

Joe Text Editor DEADJOE Symbolic Link Vulnerability

Bugtraq ID: 1959
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: Nov 16 2000 12:00AM
Updated: Nov 16 2000 12:00AM
Credit: This vulnerability was first announced on the Bugtraq mailing list in a Wkit Security Advisory on November 16, 2000.
Vulnerable: Redhat joe-2.8-40.i386.rpm
+ Redhat Linux 7.0
Redhat joe-2.8-18.i386.rpm
+ Redhat Linux 6.0
Joseph Allen joe 2.8
- FreeBSD FreeBSD 4.2
- FreeBSD FreeBSD 3.5.1
+ Mandriva Linux Mandrake 7.2
+ Mandriva Linux Mandrake 7.1
+ Mandriva Linux Mandrake 7.0
+ Mandriva Linux Mandrake 6.1
+ Mandriva Linux Mandrake 6.0
- NetBSD NetBSD 1.5
- NetBSD NetBSD 1.4.3
+ Redhat Linux 7.0
+ Redhat Linux 6.2 sparc
 + Redhat Linux 6.2 i386
 + Redhat Linux 6.2 alpha
 + Redhat Linux 6.1 sparc
 + Redhat Linux 6.1 i386
 + Redhat Linux 6.1 alpha
 + Redhat Linux 6.0 sparc
 + Redhat Linux 6.0 alpha
 + Redhat Linux 6.0
+ Redhat Linux 5.2 sparc
 + Redhat Linux 5.2 i386
 + Redhat Linux 5.2 alpha
 + Slackware Linux 7.1
+ Wirex Immunix OS 7.0 -Beta
 + Wirex Immunix OS 6.2
Not Vulnerable:

Discussion

Joe Text Editor DEADJOE Symbolic Link Vulnerability

joe is a text editor by Joseph Allen, which features familar functions to users of both Microsoft text editors and vi users. A problem occurs with the editor when a session abnormally exits.

Upon abnormal exit, the text editor saves any changes made to the file being edited into a new file in the current working directory labeled DEADJOE. When saving this file, the text editor does not check for the file type. A user editing a file in a directory writable by others could be subject to having other files written to if a malicious user were to symbollically link the DEADJOE file to one of owner/group write access of the user. This would result in the contents of the joe session being appended to the symbolically linked file, potentially corrupting the linked file.

Exploit / POC

Joe Text Editor DEADJOE Symbolic Link Vulnerability

See discussion.

Solution / Fix

Joe Text Editor DEADJOE Symbolic Link Vulnerability

Solution:
The following patches are available:


Redhat joe-2.8-18.i386.rpm

Redhat joe-2.8-40.i386.rpm

Joseph Allen joe 2.8

References

Joe Text Editor DEADJOE Symbolic Link Vulnerability

References:
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