Server-Side Request Forgery (SSRF) Affecting xstream package, versions <1.4.15-3.3.2


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
82.96% (99th percentile)

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  • Snyk IDSNYK-SLES152-XSTREAM-2690917
  • published14 Apr 2022
  • disclosed20 Jan 2021

Introduced: 20 Jan 2021

CVE-2020-26258  (opens in a new tab)
CWE-918  (opens in a new tab)

How to fix?

Upgrade SLES:15.2 xstream to version 1.4.15-3.3.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xstream package and not the xstream package as distributed by SLES. See How to fix? for SLES:15.2 relevant fixed versions and status.

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.

References

CVSS Scores

version 3.1