A Use of a Broken or Risky Cryptographic Algorithm vulnerability in the TLS/SSL server of Juniper Networks Junos Space allows the use of static key ciphers (ssl-static-key-ciphers), reducing the confidentiality of on-path traffic communicated across the connection. These ciphers also do not support Perfect Forward Secrecy (PFS), affecting the long-term confidentiality of encrypted communications. This issue affects all versions of Junos Space before 24.1R5. The severity of this vulnerability is classified as high, with a CVSS score of 8.2. Organizations should prioritize patching immediately.
Risk to organizations includes the potential exposure of sensitive data during transmission, as the use of static key ciphers can lead to compromised confidentiality. Attackers may leverage this vulnerability to intercept and decrypt communications, thereby gaining unauthorized access to critical information. Organizations must assess their deployment of Junos Space and take necessary actions to mitigate this risk.
The urgency of addressing this vulnerability is high due to its impact on data confidentiality. Organizations are encouraged to review their systems and implement the necessary updates to ensure secure communications.
As of now, there are no known exploits or public proofs of concept available for this vulnerability. However, organizations should not become complacent, as the nature of cryptographic vulnerabilities often leads to evolving threats.
Vulnerability Details
The vulnerability (CWE-327) allows the use of broken or risky cryptographic algorithms in Juniper Networks Junos Space, particularly affecting the TLS/SSL server component. It has a CVSS score of 8.2 under version 4.0, indicating high severity. The vulnerability was published on January 15, 2026, and affects all versions of Junos Space prior to 24.1R5.
Technical Analysis
The root cause of this vulnerability lies in the support for static key ciphers, which are not secure for protecting data in transit. The attack vector is network-based, allowing attackers to potentially intercept traffic without requiring physical access to the network. The attack complexity is low, as no special privileges or user interaction is necessary for exploitation. The confidentiality impact is deemed high, while integrity and availability impacts are none.
Risk & Impact Analysis
The real-world risk associated with this vulnerability is significant, as the use of static key ciphers can lead to the exposure of sensitive data. Organizations that deploy Junos Space must understand the blast radius potential, which includes the risk to customer data and overall network integrity. Given the high CVSS score and the nature of the vulnerability, organizations should prioritize remediation efforts and schedule updates promptly.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Junos Space prior to 24.1R5 are affected by this vulnerability. Organizations should review their deployment and update to a patched version to mitigate risks.
Mitigation & Remediation
To remediate this vulnerability, organizations should upgrade to Junos Space version 24.1R5 or later. If immediate patching is not possible, consider applying configuration hardening that disables the use of static key ciphers. Additionally, implementing network controls to monitor and restrict access to affected systems is recommended. Continuous security testing can help identify any ongoing vulnerabilities.
Detection Guidance
Organizations should monitor logs for any anomalies related to TLS/SSL traffic and investigate any signs of unusual access patterns. Behavioral anomalies in data transmission may indicate attempts to exploit this vulnerability.
AppSecure Threat Intelligence Insight
This vulnerability highlights the ongoing risks associated with the use of static key ciphers in cryptographic protocols. It serves as a reminder for organizations to regularly review their cryptographic implementations and ensure they are using secure algorithms. For further guidance, organizations can refer to our penetration testing methodology and consider engaging in red teaming services to simulate potential attack scenarios and improve their security posture.
Furthermore, organizations should establish a vulnerability management program to continuously assess and address vulnerabilities in their systems.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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