Junos OS Evolved ACX7000 evo-pfemand Buffer Copy DoS before 23.4R2-EVO
CVE-2024-39538 Published on July 11, 2024
Junos OS Evolved: ACX7000 Series: When multicast traffic with a specific (S,G) is received evo-pfemand crashes
A Buffer Copy without Checking Size of Input vulnerability in the PFE management daemon (evo-pfemand) of Juniper Networks Junos OS Evolved on ACX7000 Series allows an unauthenticated, adjacent attacker to cause a
Denial-of-Service (DoS).When multicast traffic with a specific, valid (S,G) is received, evo-pfemand crashes which leads to an outage of the affected FPC until it is manually recovered.
This issue affects Junos OS Evolved on ACX7000 Series:
* All versions before 21.2R3-S8-EVO,
* 21.4-EVO versions before 21.4R3-S7-EVO,
* 22.2-EVO versions before 22.2R3-S4-EVO,
* 22.3-EVO versions before 22.3R3-S3-EVO,
* 22.4-EVO versions before 22.4R3-S2-EVO,
* 23.2-EVO versions before 23.2R2-EVO,
* 23.4-EVO versions before 23.4R1-S2-EVO, 23.4R2-EVO.
Vulnerability Analysis
Weakness Type
What is a Classic Buffer Overflow Vulnerability?
The program copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. A buffer overflow condition exists when a program attempts to put more data in a buffer than it can hold, or when a program attempts to put data in a memory area outside of the boundaries of a buffer. The simplest type of error, and the most common cause of buffer overflows, is the "classic" case in which the program copies the buffer without restricting how much is copied. Other variants exist, but the existence of a classic overflow strongly suggests that the programmer is not considering even the most basic of security protections.
CVE-2024-39538 has been classified to as a Classic Buffer Overflow vulnerability or weakness.
Products Associated with CVE-2024-39538
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Affected Versions
Juniper Networks Junos OS Evolved:- Before 21.2R3-S8-EVO is affected.
- Version 21.4-EVO and below 21.4R3-S7-EVO is affected.
- Version 22.2-EVO and below 22.2R3-S4-EVO is affected.
- Version 22.3-EVO and below 22.3R3-S3-EVO is affected.
- Version 22.4-EVO and below 22.4R3-S2-EVO is affected.
- Version 23.2-EVO and below 23.2R2-EVO is affected.
- Version 23.4-EVO and below 23.4R1-S2-EVO, 23.4R2-EVO is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.