Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

BID:8602

Info

Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

Bugtraq ID: 8602
Class: Boundary Condition Error
CVE:
Remote: No
Local: Yes
Published: Sep 12 2003 12:00AM
Updated: Sep 12 2003 12:00AM
Credit: This vulnerability was reported by SNOSoft.
Vulnerable: Andries Brouwer man 1.5 m1
Andries Brouwer man 1.5 m
Andries Brouwer man 1.5 l
Andries Brouwer man 1.5 k
+ MandrakeSoft Corporate Server 2.1
+ Mandriva Linux Mandrake 9.1 ppc
+ Mandriva Linux Mandrake 9.1
+ Mandriva Linux Mandrake 9.0
+ Redhat Linux 8.0 i686
+ Redhat Linux 8.0 i386
+ Redhat Linux 8.0
Andries Brouwer man 1.5 j
+ MandrakeSoft Multi Network Firewall 2.0
+ Mandriva Linux Mandrake 8.2 ppc
+ Mandriva Linux Mandrake 8.2
+ Redhat Linux 7.3 i686
+ Redhat Linux 7.3 i386
+ Redhat Linux 7.3
+ Redhat Linux 7.2 ia64
+ Redhat Linux 7.2 i686
+ Redhat Linux 7.2 i586
+ Redhat Linux 7.2 i386
+ Redhat Linux 7.2 athlon
+ Redhat Linux 7.2
+ Redhat Linux 7.1 i686
+ Redhat Linux 7.1 i586
+ Redhat Linux 7.1 i386
+ Redhat Linux 7.1
+ Sun Linux 5.0.5
Andries Brouwer man 1.5 i2
Andries Brouwer man 1.5 i
Andries Brouwer man 1.5 h1
+ Redhat Linux 7.0
+ Redhat Linux 5.2
+ Redhat Linux 6.2
Not Vulnerable: Andries Brouwer man 1.5 m2

Discussion

Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

It has been reported that the man utility may be prone to a buffer overrun condition, when handling environment variable data. The problem is said to occur due to insufficient bounds checking when handling data stored within the MANPL environment variables. As a result of this issue, a local attacker may be capable of executing arbitrary code with the privileges of man, typically setgid 'man'.

Exploit / POC

Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

SNOSoft has reported that they have working proof of concept exploit code, however this has not been made available to the public.

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

Solution:
This issue is said to have been addressed in man 1.5m2, however this information has not been confirmed.

Currently we are not aware of any vendor-supplied patches for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

References

Man Utility MANPL Environment Variable Buffer Overrun Vulnerability

References:

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