Title: Leafnode Resource Exhaustion Denial Of Service Vulnerability
Severity: MODERATE
Description:
Leafnode is a USENET proxy server intended for sites with a small number of readers.
A denial of service vulnerability has been reported for Leafnode. The vulnerability occurs when Leafnode tries to retrieve certain news postings. Specifically, Leafnode will consume all available CPU resources when it tries to retrieve messages that have been cross-posted to several groups.
An attacker can exploit this vulnerability by cross-posting to several newsgroups where some groups are prefixes of others. When leafnode attempts to retrieve these news articles by the message-id, the leafnode nntpd server will will go into an infinite loop and consume all CPU resources thereby leading to a denial of service condition.
This vulnerability affects Leafnode 1.9.20 to 1.9.29. The default installation of Leafnode is not affected by this vulnerabilty.
Affected Products:
- Leafnode Leafnode 1.9.19
- Leafnode Leafnode 1.9.20
- Leafnode Leafnode 1.9.21
- Leafnode Leafnode 1.9.22
- Leafnode Leafnode 1.9.23
- Leafnode Leafnode 1.9.24
- Leafnode Leafnode 1.9.25
- Leafnode Leafnode 1.9.26
- Leafnode Leafnode 1.9.27
- Leafnode Leafnode 1.9.29
- MandrakeSoft Linux Mandrake 8.2.0
- MandrakeSoft Linux Mandrake 8.2.0 ppc
- MandrakeSoft Linux Mandrake 9.0.0
References:
- Leafnode: Leafnode Home Page
Juniper Networks provides this content via a wide variety of sources and production methods. If notified of errors or omissions in the content of this page, Juniper Networks, at its discretion, will modify or remove the page or leave the content as is, depending on various factors including but not limited to the reputation and authority of the party providing the notification. Please use the contact information displayed elsewhere on this page to report any errors or omissions regarding the content on this page.
