A Missing Release of Memory after Effective Lifetime vulnerability in the routing protocol daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows a local, low privileged user to cause an impact to the availability of the device.
When RIB sharding is enabled and a user executes one of several routing related show commands, a certain amount of memory is leaked. When all available memory has been consumed rpd will crash and restart.
The leak can be monitored with the CLI command:
show task memory detail | match task_shard_mgmt_cookie
where the allocated memory in bytes can be seen to continuously increase with each exploitation.
This issue affects:
Junos OS:
- all versions before 21.2R3-S9,
- 21.4 versions before 21.4R3-S11,
- 22.2 versions before 22.2R3-S7,
- 22.4 versions before 22.4R3-S7,
- 23.2 versions before 23.2R2-S4,
- 23.4 versions before 23.4R2-S4,
- 24.2 versions before 24.2R2,
- 24.4 versions before 24.4R1-S2, 24.4R2;
Junos OS Evolved:
- all versions before 22.2R3-S7-EVO
- 22.4-EVO versions before 22.4R3-S7-EVO,
- 23.2-EVO versions before 23.2R2-S4-EVO,
- 23.4-EVO versions before 23.4R2-S4-EVO,
- 24.2-EVO versions before 24.2R2-EVO,
- 24.4-EVO versions before 24.4R2-EVO.
Weakness
The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Junos | Juniper | * | 21.2 (excluding) |
| 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 | 21.2-r3-s2 (including) | 21.2-r3-s2 (including) |
| Junos | Juniper | 21.2-r3-s3 (including) | 21.2-r3-s3 (including) |
| Junos | Juniper | 21.2-r3-s4 (including) | 21.2-r3-s4 (including) |
| Junos | Juniper | 21.2-r3-s5 (including) | 21.2-r3-s5 (including) |
| Junos | Juniper | 21.2-r3-s6 (including) | 21.2-r3-s6 (including) |
| Junos | Juniper | 21.2-r3-s7 (including) | 21.2-r3-s7 (including) |
| Junos | Juniper | 21.2-r3-s8 (including) | 21.2-r3-s8 (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 | 21.4-r1-s2 (including) | 21.4-r1-s2 (including) |
| Junos | Juniper | 21.4-r2 (including) | 21.4-r2 (including) |
| Junos | Juniper | 21.4-r2-s1 (including) | 21.4-r2-s1 (including) |
| Junos | Juniper | 21.4-r2-s2 (including) | 21.4-r2-s2 (including) |
| Junos | Juniper | 21.4-r3 (including) | 21.4-r3 (including) |
| Junos | Juniper | 21.4-r3-s1 (including) | 21.4-r3-s1 (including) |
| Junos | Juniper | 21.4-r3-s10 (including) | 21.4-r3-s10 (including) |
| Junos | Juniper | 21.4-r3-s2 (including) | 21.4-r3-s2 (including) |
| Junos | Juniper | 21.4-r3-s3 (including) | 21.4-r3-s3 (including) |
| Junos | Juniper | 21.4-r3-s4 (including) | 21.4-r3-s4 (including) |
| Junos | Juniper | 21.4-r3-s5 (including) | 21.4-r3-s5 (including) |
| Junos | Juniper | 21.4-r3-s6 (including) | 21.4-r3-s6 (including) |
| Junos | Juniper | 21.4-r3-s7 (including) | 21.4-r3-s7 (including) |
| Junos | Juniper | 21.4-r3-s8 (including) | 21.4-r3-s8 (including) |
| Junos | Juniper | 21.4-r3-s9 (including) | 21.4-r3-s9 (including) |
| Junos | Juniper | 22.2 (including) | 22.2 (including) |
| Junos | Juniper | 22.2-r1 (including) | 22.2-r1 (including) |
| Junos | Juniper | 22.2-r1-s1 (including) | 22.2-r1-s1 (including) |
| Junos | Juniper | 22.2-r1-s2 (including) | 22.2-r1-s2 (including) |
| Junos | Juniper | 22.2-r2 (including) | 22.2-r2 (including) |
| Junos | Juniper | 22.2-r2-s1 (including) | 22.2-r2-s1 (including) |
| Junos | Juniper | 22.2-r2-s2 (including) | 22.2-r2-s2 (including) |
| Junos | Juniper | 22.2-r3 (including) | 22.2-r3 (including) |
| Junos | Juniper | 22.2-r3-s1 (including) | 22.2-r3-s1 (including) |
| Junos | Juniper | 22.2-r3-s2 (including) | 22.2-r3-s2 (including) |
| Junos | Juniper | 22.2-r3-s3 (including) | 22.2-r3-s3 (including) |
| Junos | Juniper | 22.2-r3-s4 (including) | 22.2-r3-s4 (including) |
| Junos | Juniper | 22.2-r3-s5 (including) | 22.2-r3-s5 (including) |
| Junos | Juniper | 22.2-r3-s6 (including) | 22.2-r3-s6 (including) |
| Junos | Juniper | 22.4 (including) | 22.4 (including) |
| Junos | Juniper | 22.4-r1 (including) | 22.4-r1 (including) |
| Junos | Juniper | 22.4-r1-s1 (including) | 22.4-r1-s1 (including) |
| Junos | Juniper | 22.4-r1-s2 (including) | 22.4-r1-s2 (including) |
| Junos | Juniper | 22.4-r2 (including) | 22.4-r2 (including) |
| Junos | Juniper | 22.4-r2-s1 (including) | 22.4-r2-s1 (including) |
| Junos | Juniper | 22.4-r2-s2 (including) | 22.4-r2-s2 (including) |
| Junos | Juniper | 22.4-r3 (including) | 22.4-r3 (including) |
| Junos | Juniper | 22.4-r3-s1 (including) | 22.4-r3-s1 (including) |
| Junos | Juniper | 22.4-r3-s2 (including) | 22.4-r3-s2 (including) |
| Junos | Juniper | 22.4-r3-s3 (including) | 22.4-r3-s3 (including) |
| Junos | Juniper | 22.4-r3-s4 (including) | 22.4-r3-s4 (including) |
| Junos | Juniper | 22.4-r3-s5 (including) | 22.4-r3-s5 (including) |
| Junos | Juniper | 22.4-r3-s6 (including) | 22.4-r3-s6 (including) |
| Junos | Juniper | 23.2 (including) | 23.2 (including) |
| Junos | Juniper | 23.2-r1 (including) | 23.2-r1 (including) |
| Junos | Juniper | 23.2-r1-s1 (including) | 23.2-r1-s1 (including) |
| Junos | Juniper | 23.2-r1-s2 (including) | 23.2-r1-s2 (including) |
| Junos | Juniper | 23.2-r2 (including) | 23.2-r2 (including) |
| Junos | Juniper | 23.2-r2-s1 (including) | 23.2-r2-s1 (including) |
| Junos | Juniper | 23.2-r2-s2 (including) | 23.2-r2-s2 (including) |
| Junos | Juniper | 23.2-r2-s3 (including) | 23.2-r2-s3 (including) |
| Junos | Juniper | 23.4 (including) | 23.4 (including) |
| Junos | Juniper | 23.4-r1 (including) | 23.4-r1 (including) |
| Junos | Juniper | 23.4-r1-s1 (including) | 23.4-r1-s1 (including) |
| Junos | Juniper | 23.4-r1-s2 (including) | 23.4-r1-s2 (including) |
| Junos | Juniper | 23.4-r2 (including) | 23.4-r2 (including) |
| Junos | Juniper | 23.4-r2-s1 (including) | 23.4-r2-s1 (including) |
| Junos | Juniper | 23.4-r2-s2 (including) | 23.4-r2-s2 (including) |
| Junos | Juniper | 23.4-r2-s3 (including) | 23.4-r2-s3 (including) |
| Junos | Juniper | 24.2 (including) | 24.2 (including) |
| Junos | Juniper | 24.2-r1 (including) | 24.2-r1 (including) |
| Junos | Juniper | 24.2-r1-s1 (including) | 24.2-r1-s1 (including) |
| Junos | Juniper | 24.2-r1-s2 (including) | 24.2-r1-s2 (including) |
| Junos | Juniper | 24.4 (including) | 24.4 (including) |
| Junos | Juniper | 24.4-r1 (including) | 24.4-r1 (including) |
| Junos | Juniper | 24.4-r2 (including) | 24.4-r2 (including) |
| Junos_os_evolved | Juniper | * | 22.2 (excluding) |
| Junos_os_evolved | Juniper | 22.2 (including) | 22.2 (including) |
| Junos_os_evolved | Juniper | 22.2-r1 (including) | 22.2-r1 (including) |
| Junos_os_evolved | Juniper | 22.2-r1-s1 (including) | 22.2-r1-s1 (including) |
| Junos_os_evolved | Juniper | 22.2-r1-s2 (including) | 22.2-r1-s2 (including) |
| Junos_os_evolved | Juniper | 22.2-r2 (including) | 22.2-r2 (including) |
| Junos_os_evolved | Juniper | 22.2-r2-s1 (including) | 22.2-r2-s1 (including) |
| Junos_os_evolved | Juniper | 22.2-r2-s2 (including) | 22.2-r2-s2 (including) |
| Junos_os_evolved | Juniper | 22.2-r3 (including) | 22.2-r3 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s1 (including) | 22.2-r3-s1 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s2 (including) | 22.2-r3-s2 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s3 (including) | 22.2-r3-s3 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s4 (including) | 22.2-r3-s4 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s5 (including) | 22.2-r3-s5 (including) |
| Junos_os_evolved | Juniper | 22.2-r3-s6 (including) | 22.2-r3-s6 (including) |
| Junos_os_evolved | Juniper | 22.4 (including) | 22.4 (including) |
| Junos_os_evolved | Juniper | 22.4-r1 (including) | 22.4-r1 (including) |
| Junos_os_evolved | Juniper | 22.4-r1-s1 (including) | 22.4-r1-s1 (including) |
| Junos_os_evolved | Juniper | 22.4-r1-s2 (including) | 22.4-r1-s2 (including) |
| Junos_os_evolved | Juniper | 22.4-r2 (including) | 22.4-r2 (including) |
| Junos_os_evolved | Juniper | 22.4-r2-s1 (including) | 22.4-r2-s1 (including) |
| Junos_os_evolved | Juniper | 22.4-r2-s2 (including) | 22.4-r2-s2 (including) |
| Junos_os_evolved | Juniper | 22.4-r3 (including) | 22.4-r3 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s1 (including) | 22.4-r3-s1 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s2 (including) | 22.4-r3-s2 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s3 (including) | 22.4-r3-s3 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s4 (including) | 22.4-r3-s4 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s5 (including) | 22.4-r3-s5 (including) |
| Junos_os_evolved | Juniper | 22.4-r3-s6 (including) | 22.4-r3-s6 (including) |
| Junos_os_evolved | Juniper | 23.2 (including) | 23.2 (including) |
| Junos_os_evolved | Juniper | 23.2-r1 (including) | 23.2-r1 (including) |
| Junos_os_evolved | Juniper | 23.2-r1-s1 (including) | 23.2-r1-s1 (including) |
| Junos_os_evolved | Juniper | 23.2-r1-s2 (including) | 23.2-r1-s2 (including) |
| Junos_os_evolved | Juniper | 23.2-r2 (including) | 23.2-r2 (including) |
| Junos_os_evolved | Juniper | 23.2-r2-s1 (including) | 23.2-r2-s1 (including) |
| Junos_os_evolved | Juniper | 23.2-r2-s2 (including) | 23.2-r2-s2 (including) |
| Junos_os_evolved | Juniper | 23.2-r2-s3 (including) | 23.2-r2-s3 (including) |
| Junos_os_evolved | Juniper | 23.4 (including) | 23.4 (including) |
| Junos_os_evolved | Juniper | 23.4-r1 (including) | 23.4-r1 (including) |
| Junos_os_evolved | Juniper | 23.4-r1-s1 (including) | 23.4-r1-s1 (including) |
| Junos_os_evolved | Juniper | 23.4-r1-s2 (including) | 23.4-r1-s2 (including) |
| Junos_os_evolved | Juniper | 23.4-r2 (including) | 23.4-r2 (including) |
| Junos_os_evolved | Juniper | 23.4-r2-s1 (including) | 23.4-r2-s1 (including) |
| Junos_os_evolved | Juniper | 23.4-r2-s2 (including) | 23.4-r2-s2 (including) |
| Junos_os_evolved | Juniper | 23.4-r2-s3 (including) | 23.4-r2-s3 (including) |
| Junos_os_evolved | Juniper | 24.2 (including) | 24.2 (including) |
| Junos_os_evolved | Juniper | 24.2-r1 (including) | 24.2-r1 (including) |
| Junos_os_evolved | Juniper | 24.2-r1-s2 (including) | 24.2-r1-s2 (including) |
| Junos_os_evolved | Juniper | 24.4 (including) | 24.4 (including) |
| Junos_os_evolved | Juniper | 24.4-r1 (including) | 24.4-r1 (including) |
| Junos_os_evolved | Juniper | 24.4-r1-s2 (including) | 24.4-r1-s2 (including) |
| Junos_os_evolved | Juniper | 24.4-r1-s3 (including) | 24.4-r1-s3 (including) |
Potential Mitigations
- Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
- For example, glibc in Linux provides protection against free of invalid pointers.
- When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
- To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.