CVE-2020-28491 Denial of Service (DoS)
Attackers can cause a denial of service via unchecked byte buffer allocation in the Jackson CBOR data format library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-28491?
CVE-2020-28491 is a high-severity denial of service vulnerability in Oracle Weblogic Server, published on 18 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
This affects the package com.fasterxml.jackson.dataformat:jackson-dataformat-cbor from 0 and before 2.11.4, from 2.12.0-rc1 and before 2.12.1. Unchecked allocation of byte buffer can cause a java.lang.OutOfMemoryError exception.
Weakness: CWE-770
Which versions are affected by CVE-2020-28491?
4 open source packages ship an affected version, including com.fasterxml.jackson.dataformat:jackson-dataformat-cbor. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor Maven | From 2.12.0rc1 | 2.12.1 |
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor Maven | From 2.12.0rc1 | 2.12.1 |
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor Maven | From 2.8.0rc1 | 2.11.4 |
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor Maven | From 2.8.0rc1 | 2.11.4 |
Products include Fasterxml Jackson-Dataformats-Binary, Oracle Weblogic Server, Quarkus Quarkus.
How do I fix CVE-2020-28491?
Upgrade com.fasterxml.jackson.dataformat:jackson-dataformat-cbor to a fixed version for your release line: 2.12.1 or 2.11.4.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-28491 being exploited?
There is no known exploitation of CVE-2020-28491 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2020-28491, GHSA-xmc8-26q4-qjhx, OESA-2021-1140, RHLW-2026-2324b17f545e0135, RHLW-2026-56415b28ea79906a, ROOT-APP-MAVEN-CVE-2020-28491 and 3 more.