PFinger Syslog Format String Vulnerability

BID:6403

Info

PFinger Syslog Format String Vulnerability

Bugtraq ID: 6403
Class: Input Validation Error
CVE:
Remote: Yes
Local: No
Published: Dec 16 2002 12:00AM
Updated: Dec 16 2002 12:00AM
Credit: Discovery of this vulnerability credited to "NGSSoftware Insight Security Research" <[email protected]>.
Vulnerable: PFinger PFinger 0.7.8
PFinger PFinger 0.7.7
PFinger PFinger 0.7.6
PFinger PFinger 0.7.5
Not Vulnerable:

Discussion

PFinger Syslog Format String Vulnerability

PFinger is prone to a format string vulnerability. This problem is due to incorrect use of the 'syslog()' function to log error messages. It is possible to corrupt memory by passing format strings through the vulnerable logging function. This may potentially be exploited to overwrite arbitrary locations in memory with attacker-specified values. This issue can be exploited via a malformed response to a DNS lookup.

Successful exploitation of this issue may allow the attacker to execute arbitrary instructions with elevated privileges.

It has been suggested that this issue may not be exploitable with many available DNS resolvers, since the '%' character is not allowed in responses.

Exploit / POC

PFinger Syslog Format String Vulnerability

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

PFinger Syslog Format String Vulnerability

Solution:
Fixes available:


PFinger PFinger 0.7.5

PFinger PFinger 0.7.6

PFinger PFinger 0.7.7

PFinger PFinger 0.7.8

References

PFinger Syslog Format String Vulnerability

References:

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