The MITRE CVE dictionary describes this issue as:
The extended-community parser in bgpd in Quagga before 0.99.18 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a malformed Extended Communities attribute.
Find out more about CVE-2010-1674 from the
MITRE CVE dictionary dictionary and
Vulnerable. This issue affects quagga packages in Red Hat Enterprise
Linux 4 and 5. The Red Hat Security Response Team has rated this issue
as having low security impact, a future update may address this flaw.