CVE-2020-4450WebSphere Application Server Insecure Deserialization
IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects.
Published Jun 4, 2021 · Updated Sep 16, 2024
Key Facts
Patch immediately- CVE-2020-4450 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting WebSphere Application Server (Ibm).
- It is exploited in the wild, listed in Industry KEV feed since Sep 18, 2024. No public exploit code is known.
- EPSS estimates a 34% probability of exploitation in the next 30 days.
- Fixed versions are available, including WebSphere Application Server 8.5.5.18.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
34%
Higher than 98.4% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
58/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Sep 18, 2024
1202 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Advisories And Exploit References
- advisoryhttp://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-4450
- advisoryhttps://www.ibm.com/blogs/psirt/security-bulletin-ibm-security-privileged-identity-manager-is-affected-by-remote-code-execution-cve-2020-4450/
- advisoryhttps://exchange.xforce.ibmcloud.com/vulnerabilities/181228
- advisoryibm-websphere-cve20204450-command-exec (181231)
- advisoryhttps://exchange.xforce.ibmcloud.com/vulnerabilities/184363
- advisoryhttps://www.ibm.com/blogs/psirt/security-bulletin-security-vulnerabilities-have-been-identified-in-ibm-websphere-application-server-used-by-ibm-infosphere-master-data-management-11-6-6/
Description
IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects. IBM X-Force ID: 181231.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Sep 18, 2024 | n/a | Not reported |
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| WebSphere Application ServerIbm | >= 8.5 | 8.5.5.18 |
Patched Releases
WebSphere Application Server
8.5.5.18
Timeline
Publicly disclosed
Jun 4, 2021
Last updated
Sep 16, 2024
Added to Industry KEV feed
Sep 18, 2024
Weakness Type
- CWE-502 Deserialization of Untrusted Data
References
- advisorycve.mitre.org · cvename.cgi
- advisoryibm.com · CVE-2020-4450
- advisoryexchange.xforce.ibmcloud.com · 181228
- advisoryibm-websphere-cve20204450-command-exec (181231)
- advisoryexchange.xforce.ibmcloud.com · 184363
FAQ
Common Questions.
IBM WebSphere Application Server 8.5 and 9.0 traditional could allow a remote attacker to execute arbitrary code on the system with a specially-crafted sequence of serialized objects.
Affected: WebSphere Application Server (Ibm) versions >= 8.5. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Sep 18, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including WebSphere Application Server 8.5.5.18.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2020-4450 On Your Attack Surface?
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