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CVE-2020-26258
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CVE-2020-26258
MITRE ATT&CK
Collection
Command and Control
Credential Access
Defense Evasion
Discovery
Execution
Exfiltration
Impact
Initial Access
Lateral Movement
Persistence
Privilege Escalation
Topic Tags
Description
XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, a Server-Side Forgery Request vulnerability can be activated when unmarshalling. The vulnerability may allow a remote attacker to request data from internal resources that are not publicly available only by manipulating the processed input stream. If you rely on XStream’s default blacklist of the Security Framework, you will have to use at least version 1.4.15. The reported vulnerability does not exist if running Java 15 or higher. No user is affected who followed the recommendation to setup XStream’s Security Framework with a whitelist! Anyone relying on XStream’s default blacklist can immediately switch to a whilelist for the allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who still want to use XStream default blacklist can use a workaround described in more detailed in the referenced advisories.
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CVSS V3 Severity and Metrics
General Information
Vendors
- debian,
- fedoraproject,
- xstream project
Products
- debian linux 10.0,
- debian linux 9.0,
- fedora 33,
- fedora 34,
- fedora 35,
- xstream
References
Advisory
Miscellaneous
Additional Info
Technical Analysis
Report as Exploited in the Wild
CVE ID
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