Bug 110324
Summary: | rpc.mountd segfaults when it recieves mount / umount requests from a host with no forward DNS mapping. | ||
---|---|---|---|
Product: | [Retired] Red Hat Linux | Reporter: | Frode Nordahl <frode> |
Component: | nfs-utils | Assignee: | Steve Dickson <steved> |
Status: | CLOSED CURRENTRELEASE | QA Contact: | Ben Levenson <benl> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 9 | CC: | jch |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | i686 | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | Doc Type: | Bug Fix | |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2004-06-16 10:30:06 UTC | Type: | --- |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Frode Nordahl
2003-11-18 14:49:09 UTC
This also occurs in RHEL3. This is a good remote attack on a system that exposes mountd. All I have to do is set up a DNS server somewhere with a broken reverse mapping and simply ask a machine of my choice whether or not I can mount something. I suspect that it is possible to construct a UDP datagram with an source IP address of my choice and crash rpc.mountd's on any machine, whether or not there's a route from that source IP address and whether or not I know what is exported by the server under attack. This *seems* to be fixed in nfs-utils-1.0.6. Please reopen bug if is is not the case |