Cross-site scripting (XSS) vulnerability in J-Web in Juniper Junos before 11.4R11, 11.4X27 before 11.4X27.62 (BBE), 12.1 before 12.1R9, 12.1X44 before 12.1X44-D35, 12.1X45 before 12.1X45-D25, 12.1X46 before 12.1X46-D20, 12.2 before 12.2R7, 12.3 before 12.3R6, 13.1 before 13.1R4, 13.2 before 13.2R3, and 13.3 before 13.3R1 allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

The OSPF implementation in Juniper Junos through 13.x, JunosE, and ScreenOS through 6.3.x does not consider the possibility of duplicate Link State ID values in Link State Advertisement (LSA) packets before performing operations on the LSA database, which allows remote attackers to cause a denial of service (routing disruption) or obtain sensitive packet information via a crafted LSA packet, a related issue to CVE-2013-0149.

Juniper Junos 10.4 before 10.4S15, 11.4 before 11.4R9, 11.4X27 before 11.4X27.44, 12.1 before 12.1R7, 12.1X44 before 12.1X44-D20, 12.1X45 before 12.1X45-D15, 12.2 before 12.2R6, 12.3 before 12.3R3, 13.1 before 13.1R3, and 13.2 before 13.2R1, when Proxy ARP is enabled on an unnumbered interface, allows remote attackers to perform ARP poisoning attacks and possibly obtain sensitive information via a crafted ARP message.

The kernel in Juniper Junos 10.4 before 10.4R14, 11.4 before 11.4R8, 11.4X27 before 11.4X27.43, 12.1 before 12.1R6, 12.1X44 before 12.1X44-D20, 12.2 before 12.2R4, and 12.3 before 12.3R2, in certain VLAN configurations with unrestricted arp-resp and proxy-arp settings, allows remote attackers to cause a denial of service (device crash) via a crafted ARP request, aka PR 842091.