CVE-2021-31354: Junos OS and Junos OS Evolved: A vulnerability in the Juniper Agile License Client may allow an attacker to perform Remote Code Execution (RCE)
First published: Tue Oct 19 2021(Updated: )
An Out Of Bounds (OOB) access vulnerability in the handling of responses by a Juniper Agile License (JAL) Client in Juniper Networks Junos OS and Junos OS Evolved, configured in Network Mode (to use Juniper Agile License Manager) may allow an attacker to cause a partial Denial of Service (DoS), or lead to remote code execution (RCE). The vulnerability exists in the packet parsing logic on the client that processes the response from the server using a custom protocol. An attacker with control of a JAL License Manager, or with access to the local broadcast domain, may be able to spoof a new JAL License Manager and/or craft a response to the Junos OS License Client, leading to exploitation of this vulnerability. This issue only affects Junos systems configured in Network Mode. Systems that are configured in Standalone Mode (the default mode of operation for all systems) are not vulnerable to this issue. This issue affects: Juniper Networks Junos OS: 19.2 versions prior to 19.2R3-S3; 19.3 versions prior to 19.3R3-S3; 20.1 versions prior to 20.1R2-S2, 20.1R3-S1; 20.2 versions prior to 20.2R3-S2; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R3; 21.1 versions prior to 21.1R2. Juniper Networks Junos OS Evolved: version 20.1R1-EVO and later versions, prior to 21.2R2-EVO. This issue does not affect Juniper Networks Junos OS versions prior to 19.2R1.
Credit: sirt@juniper.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Juniper JUNOS | =19.2 | |
| Juniper JUNOS | =19.2-r1 | |
| Juniper JUNOS | =19.2-r1-s1 | |
| Juniper JUNOS | =19.2-r1-s2 | |
| Juniper JUNOS | =19.2-r1-s3 | |
| Juniper JUNOS | =19.2-r1-s4 | |
| Juniper JUNOS | =19.2-r1-s5 | |
| Juniper JUNOS | =19.2-r1-s6 | |
| Juniper JUNOS | =19.2-r2 | |
| Juniper JUNOS | =19.2-r2-s1 | |
| Juniper JUNOS | =19.2-r3 | |
| Juniper JUNOS | =19.2-r3-s1 | |
| Juniper JUNOS | =19.2-r3-s2 | |
| Juniper JUNOS | =19.3 | |
| Juniper JUNOS | =19.3-r1 | |
| Juniper JUNOS | =19.3-r1-s1 | |
| Juniper JUNOS | =19.3-r2 | |
| Juniper JUNOS | =19.3-r2-s1 | |
| Juniper JUNOS | =19.3-r2-s2 | |
| Juniper JUNOS | =19.3-r2-s3 | |
| Juniper JUNOS | =19.3-r2-s4 | |
| Juniper JUNOS | =19.3-r2-s5 | |
| Juniper JUNOS | =19.3-r3 | |
| Juniper JUNOS | =19.3-r3-s1 | |
| Juniper JUNOS | =19.3-r3-s2 | |
| Juniper JUNOS | =20.1-r1 | |
| Juniper JUNOS | =20.1-r1-s1 | |
| Juniper JUNOS | =20.1-r1-s2 | |
| Juniper JUNOS | =20.1-r1-s3 | |
| Juniper JUNOS | =20.1-r1-s4 | |
| Juniper JUNOS | =20.1-r2 | |
| Juniper JUNOS | =20.1-r2-s1 | |
| Juniper JUNOS | =20.1-r3 | |
| Juniper JUNOS | =20.2-r1 | |
| Juniper JUNOS | =20.2-r1-s1 | |
| Juniper JUNOS | =20.2-r1-s2 | |
| Juniper JUNOS | =20.2-r1-s3 | |
| Juniper JUNOS | =20.2-r2 | |
| Juniper JUNOS | =20.2-r2-s1 | |
| Juniper JUNOS | =20.2-r2-s2 | |
| Juniper JUNOS | =20.2-r2-s3 | |
| Juniper JUNOS | =20.2-r3 | |
| Juniper JUNOS | =20.2-r3-s1 | |
| Juniper JUNOS | =20.3-r1 | |
| Juniper JUNOS | =20.3-r1-s1 | |
| Juniper JUNOS | =20.3-r2 | |
| Juniper JUNOS | =20.3-r2-s1 | |
| Juniper JUNOS | =20.4-r1 | |
| Juniper JUNOS | =20.4-r1-s1 | |
| Juniper JUNOS | =20.4-r2 | |
| Juniper JUNOS | =20.4-r2-s1 | |
| Juniper JUNOS | =21.1-r1 | |
| Juniper JUNOS | =21.1-r1-s1 | |
| Juniper Junos Os Evolved | =20.1-r1 | |
| Juniper Junos Os Evolved | =20.1-r1-s1 | |
| Juniper Junos Os Evolved | =20.1-r2 | |
| Juniper Junos Os Evolved | =20.1-r2-s1 | |
| Juniper Junos Os Evolved | =20.1-r2-s2 | |
| Juniper Junos Os Evolved | =20.1-r2-s3 | |
| Juniper Junos Os Evolved | =20.1-r2-s4 | |
| Juniper Junos Os Evolved | =20.1-r2-s5 | |
| Juniper Junos Os Evolved | =20.1-r3 | |
| Juniper Junos Os Evolved | =20.2 | |
| Juniper Junos Os Evolved | =20.2-r1 | |
| Juniper Junos Os Evolved | =20.2-r1-s1 | |
| Juniper Junos Os Evolved | =20.2-r2 | |
| Juniper Junos Os Evolved | =20.2-r2-s1 | |
| Juniper Junos Os Evolved | =20.2-r3 | |
| Juniper Junos Os Evolved | =20.3 | |
| Juniper Junos Os Evolved | =20.3-r1 | |
| Juniper Junos Os Evolved | =20.3-r1-s1 | |
| Juniper Junos Os Evolved | =20.3-r1-s2 | |
| Juniper Junos Os Evolved | =20.3-r1-s3 | |
| Juniper Junos Os Evolved | =20.3-r2 | |
| Juniper Junos Os Evolved | =20.4-r1 | |
| Juniper Junos Os Evolved | =20.4-r1-s1 | |
| Juniper Junos Os Evolved | =20.4-r1-s2 | |
| Juniper Junos Os Evolved | =20.4-r2 | |
| Juniper Junos Os Evolved | =20.4-r2-s1 | |
| Juniper Junos Os Evolved | =20.4-r2-s2 | |
| Juniper Junos Os Evolved | =20.4-r2-s3 | |
| Juniper Junos Os Evolved | =20.4-r3 | |
| Juniper Junos Os Evolved | =20.4-r3-s1 | |
| Juniper Junos Os Evolved | =21.1 | |
| Juniper Junos Os Evolved | =21.1-r1 | |
| Juniper Junos Os Evolved | =21.1-r1-s1 | |
| Juniper Junos Os Evolved | =21.1-r2 | |
| Juniper Junos Os Evolved | =21.2-r1 | |
| Juniper Junos Os Evolved | =21.2-r1-s1 |
Remedy
The following software releases have been updated to resolve this specific issue: Junos OS 19.3R3-S3, 20.1R2-S2, 20.1R3-S1, 20.2R3-S2, 20.3R3, 20.4R3, 21.1R2, 21.2R1, and all subsequent releases. Junos OS Evolved 21.2R2-EVO, 21.3R1-EVO, and all subsequent releases.
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/author
- agent/weakness
- agent/references
- agent/title
- agent/severity
- agent/remedy
- agent/softwarecombine
- agent/tags
- agent/description
- agent/first-publish-date
- agent/event
- vendor/juniper
- canonical/juniper junos
- version/juniper junos/19.2
- version/juniper junos/19.2-r1
- version/juniper junos/19.2-r1-s1
- version/juniper junos/19.2-r1-s2
- version/juniper junos/19.2-r1-s3
- version/juniper junos/19.2-r1-s4
- version/juniper junos/19.2-r1-s5
- version/juniper junos/19.2-r1-s6
- version/juniper junos/19.2-r2
- version/juniper junos/19.2-r2-s1
- version/juniper junos/19.2-r3
- version/juniper junos/19.2-r3-s1
- version/juniper junos/19.2-r3-s2
- version/juniper junos/19.3
- version/juniper junos/19.3-r1
- version/juniper junos/19.3-r1-s1
- version/juniper junos/19.3-r2
- version/juniper junos/19.3-r2-s1
- version/juniper junos/19.3-r2-s2
- version/juniper junos/19.3-r2-s3
- version/juniper junos/19.3-r2-s4
- version/juniper junos/19.3-r2-s5
- version/juniper junos/19.3-r3
- version/juniper junos/19.3-r3-s1
- version/juniper junos/19.3-r3-s2
- version/juniper junos/20.1-r1
- version/juniper junos/20.1-r1-s1
- version/juniper junos/20.1-r1-s2
- version/juniper junos/20.1-r1-s3
- version/juniper junos/20.1-r1-s4
- version/juniper junos/20.1-r2
- version/juniper junos/20.1-r2-s1
- version/juniper junos/20.1-r3
- version/juniper junos/20.2-r1
- version/juniper junos/20.2-r1-s1
- version/juniper junos/20.2-r1-s2
- version/juniper junos/20.2-r1-s3
- version/juniper junos/20.2-r2
- version/juniper junos/20.2-r2-s1
- version/juniper junos/20.2-r2-s2
- version/juniper junos/20.2-r2-s3
- version/juniper junos/20.2-r3
- version/juniper junos/20.2-r3-s1
- version/juniper junos/20.3-r1
- version/juniper junos/20.3-r1-s1
- version/juniper junos/20.3-r2
- version/juniper junos/20.3-r2-s1
- version/juniper junos/20.4-r1
- version/juniper junos/20.4-r1-s1
- version/juniper junos/20.4-r2
- version/juniper junos/20.4-r2-s1
- version/juniper junos/21.1-r1
- version/juniper junos/21.1-r1-s1
- canonical/juniper junos os evolved
- version/juniper junos os evolved/20.1-r1
- version/juniper junos os evolved/20.1-r1-s1
- version/juniper junos os evolved/20.1-r2
- version/juniper junos os evolved/20.1-r2-s1
- version/juniper junos os evolved/20.1-r2-s2
- version/juniper junos os evolved/20.1-r2-s3
- version/juniper junos os evolved/20.1-r2-s4
- version/juniper junos os evolved/20.1-r2-s5
- version/juniper junos os evolved/20.1-r3
- version/juniper junos os evolved/20.2
- version/juniper junos os evolved/20.2-r1
- version/juniper junos os evolved/20.2-r1-s1
- version/juniper junos os evolved/20.2-r2
- version/juniper junos os evolved/20.2-r2-s1
- version/juniper junos os evolved/20.2-r3
- version/juniper junos os evolved/20.3
- version/juniper junos os evolved/20.3-r1
- version/juniper junos os evolved/20.3-r1-s1
- version/juniper junos os evolved/20.3-r1-s2
- version/juniper junos os evolved/20.3-r1-s3
- version/juniper junos os evolved/20.3-r2
- version/juniper junos os evolved/20.4-r1
- version/juniper junos os evolved/20.4-r1-s1
- version/juniper junos os evolved/20.4-r1-s2
- version/juniper junos os evolved/20.4-r2
- version/juniper junos os evolved/20.4-r2-s1
- version/juniper junos os evolved/20.4-r2-s2
- version/juniper junos os evolved/20.4-r2-s3
- version/juniper junos os evolved/20.4-r3
- version/juniper junos os evolved/20.4-r3-s1
- version/juniper junos os evolved/21.1
- version/juniper junos os evolved/21.1-r1
- version/juniper junos os evolved/21.1-r1-s1
- version/juniper junos os evolved/21.1-r2
- version/juniper junos os evolved/21.2-r1
- version/juniper junos os evolved/21.2-r1-s1