SB2009031201 - Input validation error in Nextcloud server

Description

This security bulletin contains information about 1 security vulnerability.

1) Input validation error (CVE-ID: CVE-2009-0778)

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

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."

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7c0ecc4c4f8fd90988aab8a95297b9c0038b6160
• http://openwall.com/lists/oss-security/2009/03/11/2
• http://secunia.com/advisories/33758
• http://secunia.com/advisories/37471
• http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.25
• http://www.redhat.com/support/errata/RHSA-2009-0326.html
• http://www.securityfocus.com/archive/1/507985/100/0/threaded
• http://www.securityfocus.com/bid/34084
• http://www.securitytracker.com/id?1021958
• http://www.vmware.com/security/advisories/VMSA-2009-0016.html
• http://www.vupen.com/english/advisories/2009/3316
• https://bugzilla.redhat.com/show_bug.cgi?id=485163
• https://exchange.xforce.ibmcloud.com/vulnerabilities/49199
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10215
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7867