CVE-2024-39549

A Missing Release of Memory after Effective Lifetime vulnerability in the routing process daemon (rpd) of Juniper Networks Junos OS and Junos OS Evolved allows an attacker to send a malformed BGP Path attribute update which allocates memory used to log the bad path attribute. This memory is not properly freed in all circumstances, leading to a Denial of Service (DoS).

Consumed memory can be freed by manually restarting Routing Protocol Daemon (rpd).

Memory utilization could be monitored by:  user@host> show system memory or show system monitor memory status

This issue affects:

Junos OS:  * All versions before 21.2R3-S8, 

• from 21.4 before 21.4R3-S8,

• from 22.2 before 22.2R3-S4, 

• from 22.3 before 22.3R3-S3, 

• from 22.4 before 22.4R3-S3,

• from 23.2 before 23.2R2-S1, 

• from 23.4 before 23.4R1-S2, 23.4R2.

Junos OS Evolved:

• All versions before 21.2R3-S8-EVO,

• from 21.4 before 21.4R3-S8-EVO,

• from 22.2 before 22.2R3-S4-EVO,

• from 22.3 before 22.3R3-S3-EVO,

• from 22.4 before 22.4R3-S3-EVO,

• from 23.2 before 23.2R2-S1-EVO,

• from 23.4 before 23.4R1-S2-EVO, 23.4R2-EVO.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

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.

References

• https://supportportal.juniper.net/JSA83011