Junos OS: EX Series: A vulnerability in J-Web allows an unauthenticated attacker to upload arbitrary files
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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-S8, 21.1*, 21.2R3-S6, 21.3R3-S5, 21.4R3-S4, and 4 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 through its J-Web management interface. An unauthenticated remote attacker could upload arbitrary files to part of the file system, compromising its integrity and potentially enabling further attacks.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
A Missing Authentication for Critical Function vulnerability in Juniper Networks Junos OS on EX Series allows an unauthenticated, network-based attacker to cause limited impact to the file system integrity. With a specific request to installAppPackage.php that doesn't require authentication an attacker is able to upload arbitrary files via J-Web, leading to a loss of integrity for a certain part of the file system, which may allow chaining to other vulnerabilities. This issue affects Juniper Networks Junos OS on EX Series: • All versions prior to 20.4R3-S8; • 21.1 versions 21.1R1 and later; • 21.2 versions prior to 21.2R3-S6; • 21.3 versions prior to 21.3R3-S5; • 21.4 versions prior to 21.4R3-S4; • 22.1 versions prior to 22.1R3-S3; • 22.2 versions prior to 22.2R3-S1; • 22.3 versions prior to 22.3R2-S2, 22.3R3; • 22.4 versions prior to 22.4R2-S1, 22.4R3.
Timeline
- CVE published88 days
- Added to CISA KEV
CISA has evidence of exploitation in the wild
4 days - CISA remediation deadline
Due date for US federal agencies to patch
704 days (about 2 years) - Record last updated366 days (about 1 year)
- 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-S8; 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-S4; From 22.1 · fixed in 22.1R3-S3; From 22.2 · fixed in 22.2R3-S1; From 22.3 · fixed in 22.3R2-S2, 22.3R3; From 22.4 · fixed in 22.4R2-S1, 22.4R3