CVE-2020-35728
Description
A flaw was found in jackson-databind. FasterXML mishandles the interaction between serialization gadgets and typing. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Statement
The following Red Hat Products ship jackson-databind version 2.10.0 or later which is not considered affected by this CVE (see https://medium.com/@cowtowncoder/jackson-2-10-safe-default-typing-2d018f0ce2ba)
- JBoss Data Grid 7
- JBoss Data Grid 8
- Enterprise Application Platform 7
- Red Hat Decision Manager 7
- Red Hat Process Automation Manager 7
- Red Hat Single Sign-On (RH-SSO) 7
- Red Hat JBoss Fuse 7
- Red Hat JBoss A-MQ
- Red Hat Enterprise Linux 8
- Red Hat Satellite 6.6
- Red Hat Satellite 6.7
- Red Hat Satellite 6.8
- Red Hat CodeReady Studio 12
Red Hat OpenShift Container Platform and Red Hat OpenStack Platform does ship the vulnerable components, but does not enable the unsafe conditions needed to exploit, lowering their vulnerability impact.
In Red Hat Openshift 4 there are no plans to maintain the ose-logging-elasticsearch5 container, hence it has been marked wontfix at this time and may be fixed in a future update.
Red Hat OpenStack Platform 13 ships OpenDaylight, which contains the vulnerable jackson-databind, but does not expose jackson-databind in a way that would make it exploitable. As such, Red Hat will not be providing a fix for OpenDaylight at this time.
Mitigation
The following conditions are needed for an exploit, we recommend avoiding all if possible:
* Deserialization from sources you do not control
* `enableDefaultTyping()`
* `@JsonTypeInfo using `id.CLASS` or `id.MINIMAL_CLASS`
* avoid com.oracle.wls.shaded.org.apache.xalan.lib.sql.JNDIConnectionPool in the classpath
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.1 | 8.1 | 8.1 |
| Attack Vector | Network | Network | Network |
| Attack Complexity | High | High | High |
| Privileges Required | None | None | None |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Files or Directories; Read Application Data
The injected code could access restricted data / files.
Access Control
Technical Impact: Bypass Protection Mechanism
In some cases, injectable code controls authentication; this may lead to a remote vulnerability.
Access Control
Technical Impact: Gain Privileges or Assume Identity
Injected code can access resources that the attacker is directly prevented from accessing.
Integrity,Confidentiality,Availability,Other
Technical Impact: Execute Unauthorized Code or Commands
Code injection attacks can lead to loss of data integrity in nearly all cases as the control-plane data injected is always incidental to data recall or writing. Additionally, code injection can often result in the execution of arbitrary code.
Non-Repudiation
Technical Impact: Hide Activities
Often the actions performed by injected control code are unlogged.
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