CVE-2016-1245

It was discovered that the zebra daemon in Quagga before 1.0.20161017 suffered from a stack-based buffer overflow when processing IPv6 Neighbor Discovery messages. The root cause was relying on BUFSIZ to be compatible with a message size; however, BUFSIZ is system-dependent.

It was discovered that the zebra daemon in the Quagga routing suite suffered from a stack-based buffer overflow when processing IPv6 Neighbor Discovery messages (CVE-2016-1245).

These are all security issues fixed in the libospf0-1.0.20160315-5.1 package on the GA media of openSUSE Tumbleweed.

This update for quagga fixes the following issues:

• CVE-2016-1245: Fix for a zebra stack overrun in IPv6 RA receive code (bsc#1005258).

This update for quagga fixes the following issue:

• CVE-2016-1245: Fix for a zebra stack overrun in IPv6 RA receive code (bsc#1005258).

This update provides Quagga 1.1.1, which brings several fixes and enhancements.

Security issues fixed:

• CVE-2017-5495: Telnet 'vty' interface DoS due to unbounded memory allocation. (bsc#1021669)
• CVE-2016-1245: Stack overrun in IPv6 RA receive code. (bsc#1005258)

Bug fixes:

• Do not enable zebra's TCP interface (port 2600) to use default UNIX socket for communication between the daemons. (fate#323170)

Between 0.99.22.1 and 1.1.1 the following improvements have been implemented:

• Changed the default of 'link-detect' state, controlling whether zebra will respond to link-state events and consider an interface to be down when link is down. To retain the current behavior save your config before updating, otherwise remove the 'link-detect' flag from your config prior to updating. There is also a new global 'default link-detect (on|off)' flag to configure the global default.
• Greatly improved nexthop resolution for recursive routes.
• Event driven nexthop resolution for BGP.
• Route tags support.
• Transport of TE related metrics over OSPF, IS-IS.
• IPv6 Multipath for zebra and BGP.
• Multicast RIB support has been extended. It still is IPv4 only.
• RIP for IPv4 now supports equal-cost multipath (ECMP).
• route-maps have a new action 'set ipv6 next-hop peer-address'.
• route-maps have a new action 'set as-path prepend last-as'.
• 'next-hop-self all' to override nexthop on iBGP route reflector setups.
• New pimd daemon provides IPv4 PIM-SSM multicast routing.
• IPv6 address management has been improved regarding tentative addresses. This is visible in that a freshly configured address will not immediately be marked as usable.
• Recursive route support has been overhauled. Scripts parsing 'show ip route' output may need adaptation.
• A large amount of changes has been merged for ospf6d. Careful evaluation prior to deployment is recommended.
• Multiprotocol peerings over IPv6 now try to find a more appropriate IPv4 nexthop by looking at the interface.
• Relaxed bestpath criteria for multipath and improved display of multipath routes in 'show ip bgp'. Scripts parsing this output may need to be updated.
• Support for iBGP TTL security.

David Lamparter discovered that Quagga incorrectly handled certain IPv6 router advertisements. A remote attacker could possibly use this issue to cause Quagga to crash, resulting in a denial of service.