CVE-2009-0778

Description

From CVE.org

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."

Statement

This issue did not affect the versions of Linux kernel as shipped with Red Hat Enterprise Linux 2.1, 3, 4, and Red Hat Enterprise MRG.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v2 Score Breakdown

Red HatNVDcve.org
Base Score7.17.1N/A
Attack VectorNetworkNetworkN/A
Access ComplexityMediumMediumN/A
AuthenticationNoneNoneN/A
Confidentiality ImpactNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactCompleteCompleteN/A

Vector

Red Hat: AV:N/AC:M/Au:N/C:N/I:N/A:C

NVD: AV:N/AC:M/Au:N/C:N/I:N/A:C

Understanding the Weakness (CWE)

CWE-772

Availability

Technical Impact: DoS: Resource Consumption (Other); DoS: Resource Consumption (Memory); DoS: Resource Consumption (CPU)

An attacker that can influence the allocation of resources that are not properly released could deplete the available resource pool and prevent all other processes from accessing the same type of resource. Frequently-affected resources include memory, CPU, disk space, power or battery, etc.

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