Risk Letters

Exploited vulnerability

CVE-2023-36844

TLP:CLEAR

Juniper Junos OS EX Series PHP External Variable Modification Vulnerability

Juniper Junos OS on EX Series contains a PHP external variable modification vulnerability that allows an unauthenticated, network-based attacker to control certain, important environment variables. Using a crafted request an attacker is able to modify certain PHP environment variables, leading to partial loss of integrity, which may allow chaining to other vulnerabilities.

Facts

  • Vendor: Juniper
  • Product: Junos OS
  • CVSS: 5.3
  • EPSS (probability of exploitation within 30 days): 90 %
  • On CISA's Known Exploited Vulnerabilities list since: 13 November 2023
  • First known exploitation: 13 November 2023
  • CISA's deadline for US federal agencies: 17 November 2023
  • Weakness: CWE-473
  • First seen by Risk Letters: 13 November 2023

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD