The pinger in Squid 3.x before 3.4.8 allows remote attackers to obtain sensitive information or cause a denial of service (crash) via a crafted (1) ICMP or (2) ICMP6 packet size.
Exploitability
AV:NAC:LAu:NImpact
C:PI:NA:P6.4/AV:N/AC:L/Au:N/C:P/I:N/A:P