Root code execution via out-of-bounds memory write
Published Jan 12, 2024 · Updated Oct 25, 2024
Out-of-bounds writing in J-Web in Juniper Networks Junos OS on SRX and EX Series allows remote attackers to execute code as root. An insecure function processes network input without adequate bounds enforcement and overwrites arbitrary memory; Juniper has not named the function. J-Web must be enabled over HTTP or HTTPS; no authentication or user interaction is required, and exploitation can instead crash the device.
Summary
What happened
Out-of-bounds writing in J-Web in Juniper Networks Junos OS on SRX and EX Series allows remote attackers to execute code as root. An insecure function processes network input without adequate bounds enforcement and overwrites arbitrary memory; Juniper has not named the function. J-Web must be enabled over HTTP or HTTPS; no authentication or user interaction is required, and exploitation can instead crash the device.
The record
- CVE
- CVE-2024-21591
- Published
- Jan 12, 2024
- Updated
- Oct 25, 2024
- Vendor
- Juniper Networks
- Product
- Junos OS
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 12, 2024CVE publishedPublication date reported by the CVE source.
- Oct 25, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <20.4R3-S9
- Affected versionversion=21.2 <21.2R3-S7
- Affected versionversion=21.3 <21.3R3-S5
- Affected versionversion=21.4 <21.4R3-S5
- Affected versionversion=22.1 <22.1R3-S4
- Affected versionversion=22.2 <22.2R3-S3
- Affected versionversion=22.3 <22.3R3-S2
- Affected versionversion=22.4 <22.4R2-S2, 22.4R3
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Curesec Juniper Remote Code Execution research exploitproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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