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CVE-2009-0778

Publication date 12 March 2009

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

The icmp_send function in net/ipv4/icmp.c in the Linux kernel before 2.6.25, when configured as a router with a REJECT route, does not properly manage the Protocol Independent Destination Cache (aka DST) in some situations involving transmission of an ICMP Host Unreachable message, which allows remote attackers to cause a denial of service (connectivity outage) by sending a large series of packets to many destination IP addresses within this REJECT route, related to an "rt_cache leak."

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 9.04 jaunty
Not affected
8.10 intrepid
Not affected
8.04 LTS hardy
Not affected
7.10 gutsy Not in release
6.06 LTS dapper Not in release
linux-source-2.6.15 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy Not in release
6.06 LTS dapper
Not affected
linux-source-2.6.22 9.04 jaunty Not in release
8.10 intrepid Not in release
8.04 LTS hardy Not in release
7.10 gutsy Ignored
6.06 LTS dapper Not in release

Notes

smb

The commit which (according to the commit message) introduced the problem was in v2.6.25-rc1, the fix in v2.6.25-rc8. So Dapper and Hardy are not affected.