Juniper Junos OS EX Series PHP External Variable Modification Vulnerability (CVE-2023-36844)
Severity: medium · Patch status: unknown · Since 2023-11-13 · CVE-2023-36844
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. CISA added CVE-2023-36844 to its Known Exploited Vulnerabilities catalog on Nov 13, 2023, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Nov 17, 2023 (BOD 22-01); treat that as the outer limit.
Sources
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