Junos OS: EX Series: A PHP vulnerability in J-Web allows an unauthenticated attacker to control important environment variables
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Fix
- Fixed in 20.4R3-S9, 21.1*, 21.2R3-S6, 21.3R3-S5, 21.4R3-S5, and 5 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Juniper Networks Junos OS running on EX Series switches is affected, specifically the J-Web management interface built on PHP. An unauthenticated remote attacker who sends a specially crafted request could modify certain important PHP environment variables, causing a partial loss of integrity and potentially enabling chaining with other vulnerabilities.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A PHP External Variable Modification vulnerability in J-Web of Juniper Networks Junos OS on EX Series 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. This issue affects Juniper Networks Junos OS on EX Series: • All versions prior to 20.4R3-S9; • 21.1 versions 21.1R1 and later; • 21.2 versions prior to 21.2R3-S7; • 21.3 versions prior to 21.3R3-S5; • 21.4 versions prior to 21.4R3-S5; • 22.1 versions prior to 22.1R3-S4; • 22.2 versions prior to 22.2R3-S2; • 22.3 versions prior to 22.3R3-S1; • 22.4 versions prior to 22.4R2-S2, 22.4R3; • 23.2 versions prior to 23.2R1-S1, 23.2R2.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Juniper Networks Junos OS
fixed in 20.4R3-S9; From 21.1 · fixed in 21.1*; From 21.2 · fixed in 21.2R3-S6; From 21.3 · fixed in 21.3R3-S5; From 21.4 · fixed in 21.4R3-S5; From 22.1 · fixed in 22.1R3-S4; From 22.2 · fixed in 22.2R3-S2; From 22.3 · fixed in 22.3R3-S1; From 22.4 · fixed in 22.4R2-S2, 22.4R3; From 23.2 · fixed in 23.2R1-S1, 23.2R2