CVE Catalog

CVE-2023-36831

HighCVSS 7.5
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.53%

40th percentile - higher than 40% of all known CVEs

Summary

CVE-2023-36831 describes an improper check or handling of exceptional conditions vulnerability in the UTM Web-Filtering feature of Juniper Networks Junos OS. This issue leads to a jbuf memory leak when accessing certain websites, potentially resulting in a Denial of Service (DoS) condition.

Risk Assessment

The organization may experience service outages, leading to operational disruptions and potential financial losses. Service restoration is only possible by rebooting the system.

Recommendation

It is recommended to update the Junos OS to a version that is not vulnerable to this issue to minimize the risk of Denial of Service. Additionally, monitoring access to websites is advised to detect potential exploitation attempts.

Related vulnerabilities

Original NVD description (English source)

An Improper Check or Handling of Exceptional Conditions vulnerability in the UTM (Unified Threat Management) Web-Filtering feature of Juniper Networks Junos OS on SRX Series causes a jbuf memory leak to occur when accessing certain websites, eventually leading to a Denial of Service (DoS) condition. Service restoration is only possible by rebooting the system. The jbuf memory leak only occurs in SSL Proxy and UTM Web-Filtering configurations. Other products, platforms, and configurations are not affected by this vulnerability. This issue affects Juniper Networks Junos OS on SRX Series: 22.2 versions prior to 22.2R3; 22.3 versions prior to 22.3R2-S1, 22.3R3; 22.4 versions prior to 22.4R1-S2, 22.4R2. This issue does not affect Juniper Networks Junos OS versions prior to 22.2R2.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS