Title: Man Utility MANPL Environment Variable Buffer Overrun Vulnerability
Severity: MODERATE
Description:
The man utility is used for formatting and displaying various system manuals and documentation. It is possible to specify the length of lines to display using the MANPL environment variables.
It has been reported that the man utility may be prone to a buffer overrun conditon, when handling environment variable data. The problem is said to specifically occur due to insufficient bounds checking when handling data stored within the MANPL variable.
As a result of this issue, a local attacker may be capable of executing arbitrary code with the privileges of man, typically setgid 'man'. This could be accomplished by placing approximately 128 or more bytes of data, within the affected environment variable, and invoking man.
It should be noted that some vendors are said to apply a patch to affected man releases, however some systems may still deploy the vulnerable version with setgid privileges.
Affected Products:
- Andries Brouwer man 1.5.0h1
- Andries Brouwer man 1.5.0i
- Andries Brouwer man 1.5.0i2
- Andries Brouwer man 1.5.0j
- Andries Brouwer man 1.5.0k
- Andries Brouwer man 1.5.0l
- Andries Brouwer man 1.5.0m
- Andries Brouwer man 1.5.0m1
- Conectiva Linux 6.0.0
- Conectiva Linux 7.0.0
- Conectiva Linux 8.0.0
- MandrakeSoft Corporate Server 2.1.0
- MandrakeSoft Linux Mandrake 8.2.0
- MandrakeSoft Linux Mandrake 8.2.0 ppc
- MandrakeSoft Linux Mandrake 9.0.0
- MandrakeSoft Linux Mandrake 9.1.0
- MandrakeSoft Linux Mandrake 9.1.0 ppc
- MandrakeSoft Multi Network Firewall 2.0.0
- RedHat Linux 5.2.0
- RedHat Linux 6.2.0
- RedHat Linux 7.0.0
- RedHat Linux 7.1.0
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 i586
- RedHat Linux 7.1.0 i686
- RedHat Linux 7.2.0
- RedHat Linux 7.2.0 athlon
- RedHat Linux 7.2.0 i386
- RedHat Linux 7.2.0 i586
- RedHat Linux 7.2.0 i686
- RedHat Linux 7.2.0 ia64
- RedHat Linux 7.3.0
- RedHat Linux 7.3.0 i386
- RedHat Linux 7.3.0 i686
- RedHat Linux 8.0.0
- RedHat Linux 8.0.0 i386
- RedHat Linux 8.0.0 i686
- Sun Linux 5.0.5
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