Title: Debian and Ubuntu Postfix Insecure Temporary File Creation Vulnerability
Severity: LOW
Description:
Postfix is an open-source Mail Transfer Agent (MTA).
Postfix creates '/var/spool/postfix/pid' in an insecure manner. An attacker with local access could potentially exploit this issue to perform symbolic-link attacks, overwriting arbitrary files in the context of the affected application.
Successfully mounting a symlink attack may allow the attacker to delete or corrupt sensitive files, which may result in a denial of service. Other attacks may also be possible.
This issue affects the following:
Postfix 2.5.5 on Debian 4.0 (and later)
Postfix 2.5.5 on Ubuntu 6.06 LTS (and later)
Other versions may also be affected.
Affected Products:
- Debian Linux 4.0
- Debian Linux 4.0 alpha
- Debian Linux 4.0 amd64
- Debian Linux 4.0 arm
- Debian Linux 4.0 armel
- Debian Linux 4.0 hppa
- Debian Linux 4.0 ia-32
- Debian Linux 4.0 ia-64
- Debian Linux 4.0 m68k
- Debian Linux 4.0 mips
- Debian Linux 4.0 mipsel
- Debian Linux 4.0 powerpc
- Debian Linux 4.0 s/390
- Debian Linux 4.0 sparc
- Debian Linux 5.0
- Debian Linux 5.0 alpha
- Debian Linux 5.0 amd64
- Debian Linux 5.0 arm
- Debian Linux 5.0 armel
- Debian Linux 5.0 hppa
- Debian Linux 5.0 ia-32
- Debian Linux 5.0 ia-64
- Debian Linux 5.0 m68k
- Debian Linux 5.0 mips
- Debian Linux 5.0 mipsel
- Debian Linux 5.0 powerpc
- Debian Linux 5.0 s/390
- Debian Linux 5.0 sparc
- Ubuntu Ubuntu Linux 6.06 LTS amd64
- Ubuntu Ubuntu Linux 6.06 LTS i386
- Ubuntu Ubuntu Linux 6.06 LTS powerpc
- Ubuntu Ubuntu Linux 6.06 LTS sparc
- Ubuntu Ubuntu Linux 6.10 amd64
- Ubuntu Ubuntu Linux 6.10 i386
- Ubuntu Ubuntu Linux 6.10 powerpc
- Ubuntu Ubuntu Linux 6.10 sparc
- Ubuntu Ubuntu Linux 7.04 amd64
- Ubuntu Ubuntu Linux 7.04 i386
- Ubuntu Ubuntu Linux 7.04 powerpc
- Ubuntu Ubuntu Linux 7.04 sparc
- Ubuntu Ubuntu Linux 7.10 amd64
- Ubuntu Ubuntu Linux 7.10 i386
- Ubuntu Ubuntu Linux 7.10 lpia
- Ubuntu Ubuntu Linux 7.10 powerpc
- Ubuntu Ubuntu Linux 7.10 sparc
- Ubuntu Ubuntu Linux 8.04 LTS amd64
- Ubuntu Ubuntu Linux 8.04 LTS i386
- Ubuntu Ubuntu Linux 8.04 LTS lpia
- Ubuntu Ubuntu Linux 8.04 LTS powerpc
- Ubuntu Ubuntu Linux 8.04 LTS sparc
- Ubuntu Ubuntu Linux 8.10 amd64
- Ubuntu Ubuntu Linux 8.10 i386
- Ubuntu Ubuntu Linux 8.10 lpia
- Ubuntu Ubuntu Linux 8.10 powerpc
- Ubuntu Ubuntu Linux 8.10 sparc
- Ubuntu Ubuntu Linux 9.04 amd64
- Ubuntu Ubuntu Linux 9.04 i386
- Ubuntu Ubuntu Linux 9.04 lpia
- Ubuntu Ubuntu Linux 9.04 powerpc
- Ubuntu Ubuntu Linux 9.04 sparc
- Wietse Venema Postfix 2.5.5
References:
- Debian: Debian Homepage
- Jamie Strandboge: Insecure pid directory permissions for postfix on Debian / Ubuntu
- Ubuntu: Ubuntu Homepage
- Wietse Venema: Postfix Homepage
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