HTTP: XStream Library CVE-2020-26259 Arbitrary File Deletion

This signature detects attempts to exploit a known vulnerability against XStream Library. A successful attack can result in a denial-of-service condition.

Extended Description

XStream is a Java library to serialize objects to XML and back again. In XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on the local host when unmarshalling. The vulnerability may allow a remote attacker to delete arbitrary know files on the host as log as the executing process has sufficient rights 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 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.

Affected Products

Xstream xstream

References

CVE: CVE-2020-26259

Short Name

HTTP:XSTREAM-CVE-2020-26529-AFD

Severity

Minor

Recommended

False

Recommended Action

Drop

HTTP: XStream Library CVE-2020-26259 Arbitrary File Deletion

Extended Description

Affected Products

References

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