An Improper Check for Unusual or Exceptional Conditions vulnerability in the Packet Forwarding Engine (PFE) of Juniper Networks Junos OS on SRX Series allows an unauthenticated, network-based, attacker to cause Denial of Service (DoS). A PFE crash will happen when a GPRS Tunnel Protocol (GTP) packet is received with a malformed field in the IP header of GTP encapsulated General Packet Radio Services (GPRS) traffic. The packet needs to match existing state which is outside the attackers control, so the issue cannot be directly exploited. The issue will only be observed when endpoint address validation is enabled. This issue affects Juniper Networks Junos OS on SRX Series: 20.2 versions prior to 20.2R3-S5; 20.3 versions prior to 20.3R3-S4; 20.4 versions prior to 20.4R3-S3; 21.1 versions prior to 21.1R3-S2; 21.2 versions prior to 21.2R3-S1; 21.3 versions prior to 21.3R3; 21.4 versions prior to 21.4R1-S2, 21.4R2; 22.1 versions prior to 22.1R1-S1, 22.1R2. This issue does not affect Juniper Networks Junos OS versions prior to 20.2R1.
The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.
Name | Vendor | Start Version | End Version |
---|---|---|---|
Junos | Juniper | 20.2 (including) | 20.2 (including) |
Junos | Juniper | 20.2-r1 (including) | 20.2-r1 (including) |
Junos | Juniper | 20.2-r1-s1 (including) | 20.2-r1-s1 (including) |
Junos | Juniper | 20.2-r1-s2 (including) | 20.2-r1-s2 (including) |
Junos | Juniper | 20.2-r1-s3 (including) | 20.2-r1-s3 (including) |
Junos | Juniper | 20.2-r2 (including) | 20.2-r2 (including) |
Junos | Juniper | 20.2-r2-s1 (including) | 20.2-r2-s1 (including) |
Junos | Juniper | 20.2-r2-s2 (including) | 20.2-r2-s2 (including) |
Junos | Juniper | 20.2-r2-s3 (including) | 20.2-r2-s3 (including) |
Junos | Juniper | 20.2-r3 (including) | 20.2-r3 (including) |
Junos | Juniper | 20.2-r3-s1 (including) | 20.2-r3-s1 (including) |
Junos | Juniper | 20.2-r3-s2 (including) | 20.2-r3-s2 (including) |
Junos | Juniper | 20.2-r3-s3 (including) | 20.2-r3-s3 (including) |
Junos | Juniper | 20.2-r3-s4 (including) | 20.2-r3-s4 (including) |
Junos | Juniper | 20.3 (including) | 20.3 (including) |
Junos | Juniper | 20.3-r1 (including) | 20.3-r1 (including) |
Junos | Juniper | 20.3-r1-s1 (including) | 20.3-r1-s1 (including) |
Junos | Juniper | 20.3-r1-s2 (including) | 20.3-r1-s2 (including) |
Junos | Juniper | 20.3-r2 (including) | 20.3-r2 (including) |
Junos | Juniper | 20.3-r2-s1 (including) | 20.3-r2-s1 (including) |
Junos | Juniper | 20.3-r3 (including) | 20.3-r3 (including) |
Junos | Juniper | 20.3-r3-s1 (including) | 20.3-r3-s1 (including) |
Junos | Juniper | 20.3-r3-s2 (including) | 20.3-r3-s2 (including) |
Junos | Juniper | 20.3-r3-s3 (including) | 20.3-r3-s3 (including) |
Junos | Juniper | 20.4 (including) | 20.4 (including) |
Junos | Juniper | 20.4-r1 (including) | 20.4-r1 (including) |
Junos | Juniper | 20.4-r1-s1 (including) | 20.4-r1-s1 (including) |
Junos | Juniper | 20.4-r2 (including) | 20.4-r2 (including) |
Junos | Juniper | 20.4-r2-s1 (including) | 20.4-r2-s1 (including) |
Junos | Juniper | 20.4-r2-s2 (including) | 20.4-r2-s2 (including) |
Junos | Juniper | 20.4-r3 (including) | 20.4-r3 (including) |
Junos | Juniper | 20.4-r3-s1 (including) | 20.4-r3-s1 (including) |
Junos | Juniper | 20.4-r3-s2 (including) | 20.4-r3-s2 (including) |
Junos | Juniper | 21.1 (including) | 21.1 (including) |
Junos | Juniper | 21.1-r1 (including) | 21.1-r1 (including) |
Junos | Juniper | 21.1-r1-s1 (including) | 21.1-r1-s1 (including) |
Junos | Juniper | 21.1-r2 (including) | 21.1-r2 (including) |
Junos | Juniper | 21.1-r2-s1 (including) | 21.1-r2-s1 (including) |
Junos | Juniper | 21.1-r2-s2 (including) | 21.1-r2-s2 (including) |
Junos | Juniper | 21.1-r3 (including) | 21.1-r3 (including) |
Junos | Juniper | 21.1-r3-s1 (including) | 21.1-r3-s1 (including) |
Junos | Juniper | 21.2 (including) | 21.2 (including) |
Junos | Juniper | 21.2-r1 (including) | 21.2-r1 (including) |
Junos | Juniper | 21.2-r1-s1 (including) | 21.2-r1-s1 (including) |
Junos | Juniper | 21.2-r1-s2 (including) | 21.2-r1-s2 (including) |
Junos | Juniper | 21.2-r2 (including) | 21.2-r2 (including) |
Junos | Juniper | 21.2-r2-s1 (including) | 21.2-r2-s1 (including) |
Junos | Juniper | 21.2-r2-s2 (including) | 21.2-r2-s2 (including) |
Junos | Juniper | 21.2-r3 (including) | 21.2-r3 (including) |
Junos | Juniper | 21.2-r3-s1 (including) | 21.2-r3-s1 (including) |
Junos | Juniper | 21.3 (including) | 21.3 (including) |
Junos | Juniper | 21.3-r1 (including) | 21.3-r1 (including) |
Junos | Juniper | 21.3-r1-s1 (including) | 21.3-r1-s1 (including) |
Junos | Juniper | 21.3-r1-s2 (including) | 21.3-r1-s2 (including) |
Junos | Juniper | 21.3-r2 (including) | 21.3-r2 (including) |
Junos | Juniper | 21.3-r2-s1 (including) | 21.3-r2-s1 (including) |
Junos | Juniper | 21.3-r2-s2 (including) | 21.3-r2-s2 (including) |
Junos | Juniper | 21.4 (including) | 21.4 (including) |
Junos | Juniper | 21.4-r1 (including) | 21.4-r1 (including) |
Junos | Juniper | 21.4-r1-s1 (including) | 21.4-r1-s1 (including) |
Junos | Juniper | 22.1-r1 (including) | 22.1-r1 (including) |
The programmer may assume that certain events or conditions will never occur or do not need to be worried about, such as low memory conditions, lack of access to resources due to restrictive permissions, or misbehaving clients or components. However, attackers may intentionally trigger these unusual conditions, thus violating the programmer’s assumptions, possibly introducing instability, incorrect behavior, or a vulnerability. Note that this entry is not exclusively about the use of exceptions and exception handling, which are mechanisms for both checking and handling unusual or unexpected conditions.