innfeed Command-Line Buffer Overflow Vulnerability

BID:2620

Info

innfeed Command-Line Buffer Overflow Vulnerability

Bugtraq ID: 2620
Class: Boundary Condition Error
CVE:
Remote: No
Local: Yes
Published: Apr 18 2001 12:00AM
Updated: Apr 18 2001 12:00AM
Credit: This vulnerability was made public in an advisory released 18 April, 2001 by Enrique A. Sanchez Montellano <@defcom.com>
Vulnerable: ISC INN 2.2.3
ISC INN 2.2.2
ISC INN 2.2.1
- S.u.S.E. Linux 6.3
- S.u.S.E. Linux 6.2
- S.u.S.E. Linux 6.1 alpha
 - S.u.S.E. Linux 6.1
- S.u.S.E. Linux 6.0
- S.u.S.E. Linux 5.3
ISC INN 2.2
ISC INN 2.1
ISC INN 2.0
Not Vulnerable: ISC INN 2.3.1
ISC INN 2.3

Discussion

innfeed Command-Line Buffer Overflow Vulnerability

The innfeed utility, part of ISC InterNetNews, has an exploitable buffer overflow in its command-line parser. Specifically, innfeed will overflow if an overly long -c option is passed to it.

A local attacker in the news group could use this overflow to execute arbitary code with an effective userid of news, which could constitute an elevation in privileges, and the ability to alter news-owned binaries that could be run by root.

Exploits are available against x86 Linux builds of innfeed.

Exploit / POC

innfeed Command-Line Buffer Overflow Vulnerability

An exploit and a small script to brute-force addresses are available against x86 Linux builds of innfeed.

Solution / Fix

innfeed Command-Line Buffer Overflow Vulnerability

Solution:
ISC recommends that users upgrade INN to 2.3.0, which features a rewritten startinnfeed utility.

INN 2.3.1 is available:


ISC INN 2.0

ISC INN 2.1

ISC INN 2.2

ISC INN 2.2.1

ISC INN 2.2.2

ISC INN 2.2.3

References

innfeed Command-Line Buffer Overflow Vulnerability

References:

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