An Improper Check for Unusual or Exceptional Conditions vulnerability in the SIP ALG of Juniper Networks Junos OS on SRX Series and MX Series allows an unauthenticated network-based attacker to cause an integrity impact in connected networks. If the SIP ALG is configured and a device receives a specifically malformed SIP packet, the device prevents this packet from being forwarded, but any subsequently received retransmissions of the same packet are forwarded as if they were valid. This issue affects Juniper Networks Junos OS on SRX Series and MX Series: * 20.4 versions prior to 20.4R3-S5; * 21.1 versions prior to 21.1R3-S4; * 21.2 versions prior to 21.2R3-S4; * 21.3 versions prior to 21.3R3-S3; * 21.4 versions prior to 21.4R3-S2; * 22.1 versions prior to 22.1R2-S2,
The following software releases have been updated to resolve this specific issue: Junos OS 20.4R3-S5, 21.1R3-S4, 21.2R3-S4, 21.3R3-S3, 21.4R3-S2, 22.1R2-S2, 22.1R3, 22.2R2-S1, 22.2R3, 22.3R1-S2, 22.3R2, 22.4R1, and all subsequent releases.
There are no known workarounds for this issue.
| Product | Vulnerable range | Fixed version | Advisory |
|---|---|---|---|
| Juniper Networks Junos OS | <20.4R1 | 20.4R1 | advisory ↗ |
| Juniper Networks Junos OS | >=20.4<20.4R3-S5 | 20.4R3-S5 | advisory ↗ |
| Juniper Networks Junos OS | >=21.1<21.1R3-S4 | 21.1R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=21.2<21.2R3-S4 | 21.2R3-S4 | advisory ↗ |
| Juniper Networks Junos OS | >=21.3<21.3R3-S3 | 21.3R3-S3 | advisory ↗ |
| Juniper Networks Junos OS | >=21.4<21.4R3-S2 | 21.4R3-S2 | advisory ↗ |
| Juniper Networks Junos OS | >=22.1<22.1R2-S2, 22.1R3 | 22.1R2-S2, 22.1R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.2<22.2R2-S1, 22.2R3 | 22.2R2-S1, 22.2R3 | advisory ↗ |
| Juniper Networks Junos OS | >=22.3<22.3R1-S2, 22.3R2 | 22.3R1-S2, 22.3R2 | advisory ↗ |