Description
A Improper Validation of Specified Index, Position, or Offset in Input vulnerability in the Juniper DHCP daemon (jdhcpd) of Juniper Networks Junos OS allows an adjacent unauthenticated attacker to cause a crash of jdhcpd and thereby a Denial of Service (DoS). In a scenario where DHCP relay or local server is configured the problem can be triggered if a DHCPv4 packet with specific options is received leading to a corruption of the options read from the packet. This corruption can then lead to jdhcpd crash and restart. This issue affects: Juniper Networks Junos OS 17.4R1 and later versions prior to 18.4R3-S10; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S8, 19.2R3-S4; 19.3 versions prior to 19.3R3-S4; 19.4 versions prior to 19.4R3-S6; 20.1 versions prior to 20.1R3-S2; 20.2 versions prior to 20.2R3-S3; 20.3 versions prior to 20.3R3-S2; 20.4 versions prior to 20.4R3-S1; 21.1 versions prior to 21.1R2-S2, 21.1R3; 21.2 versions prior to 21.2R1-S2, 21.2R2, 21.2R3; 21.3 versions prior to 21.3R1-S1, 21.3R2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Juniper Networks | Junos OS | 17.4R1 – < 17.4*, 18.4 – < 18.4R3-S10, 19.1 – < 19.1R3-S7, 19.2 – < 19.2R1-S8, 19.2R3-S4, 19.3 – < 19.3R3-S4, 19.4 – < 19.4R3-S6, 20.1 – < 20.1R3-S2, 20.2 – < 20.2R3-S3, 20.3 – < 20.3R3-S2, 20.4 – < 20.4R3-S1, 21.1 – < 21.1R2-S2, 21.1R3, 21.2 – < 21.2R1-S2, 21.2R2, 21.2R3, 21.3 – < 21.3R1-S1, 21.3R2 | 17.4* |