CVE-2020-5421 RFD Protection Bypass via jsessionid
Attackers can bypass Reflected File Download protections in Spring Framework by manipulating the jsessionid path parameter.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-5421?
CVE-2020-5421 is a high-severity vulnerability in Netapp Oncommand Insight, published on 19 Sep 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
In Spring Framework versions 5.2.0 - 5.2.8, 5.1.0 - 5.1.17, 5.0.0 - 5.0.18, 4.3.0 - 4.3.28, and older unsupported versions, the protections against RFD attacks from CVE-2015-5211 may be bypassed depending on the browser used through the use of a jsessionid path parameter.
Which versions are affected by CVE-2020-5421?
8 open source packages ship an affected version, including org.springframework:spring-framework-bom. It affects 38 products.
| Package | Affected | Fixed in |
|---|---|---|
org.springframework:spring-framework-bom Maven | All versions | 4.3.29 |
org.springframework:spring-framework-bom Maven | All versions | 4.3.29 |
org.springframework:spring-framework-bom Maven | From 5.0.0 | 5.0.19 |
org.springframework:spring-framework-bom Maven | From 5.0.0 | 5.0.19 |
org.springframework:spring-framework-bom Maven | From 5.1.0 | 5.1.18 |
org.springframework:spring-framework-bom Maven | From 5.1.0 | 5.1.18 |
2 more packages
org.springframework:spring-framework-bom Maven | From 5.2.0 | 5.2.9 |
org.springframework:spring-framework-bom Maven | From 5.2.0 | 5.2.9 |
Products include Netapp Oncommand Insight, Netapp Snap Creator Framework, Netapp Snapcenter, Oracle Commerce Guided Search, Oracle Communications Brm, Oracle Communications Design Studio and 32 more.
How do I fix CVE-2020-5421?
Upgrade org.springframework:spring-framework-bom to a fixed version for your release line: 4.3.29, 5.0.19, 5.1.18 or 5.2.9.
Is CVE-2020-5421 being exploited?
There is no known exploitation of CVE-2020-5421 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Netapp Oncommand Insight
- CVE-2017-5600 Hardcoded credentials in n/a
- CVE-2018-1258 Spring Framework when used in combination with any versions of Spring Security contains an authorization bypass
- CVE-2022-38733 Auth bypass in OnCommand Insight
- CVE-2023-22102 MySQL Connectors takeover vulnerability
- CVE-2021-35583 Denial of service in MySQL Server
Sources
Also known as CLSA-2026-1792601519, CLSA-2026-1792604310, CLSA-2026-1792604538, DEBIAN-CVE-2020-5421, GHSA-rv39-3qh7-9v7w, UBUNTU-CVE-2020-5421.