pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackers to send arbitrary data while avoiding detection via crafted packets.
article.gmane.org/gmane.network.tcpdump.devel/4968
thread.gmane.org/gmane.network.tcpdump.devel/5018
www.openwall.com/lists/oss-security/2011/05/19/11
www.openwall.com/lists/oss-security/2014/02/08/5
bugs.debian.org/cgi-bin/bugreport.cgi?att=1%3Bbug=623868%3Bfilename=0001-Fix-the-calculation-of-the-frame-size-in-memory-mapp.patch%3Bmsg=10
bugs.debian.org/cgi-bin/bugreport.cgi?bug=623868
security-tracker.debian.org/tracker/CVE-2011-1935/