Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWh2djgtMzM2Zy1yeDNt

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

Impact

The processed stream at unmarshalling time contains type information to recreate the formerly written objects. XStream creates therefore new instances based on these type information. An attacker can manipulate the processed input stream and replace or inject objects, that result in a server-side forgery request. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types.

Patches

If you rely on XStream's default blacklist of the Security Framework, you will have to use at least version 1.4.16

Workarounds

See workarounds for the different versions covering all CVEs.

References

See full information about the nature of the vulnerability and the steps to reproduce it in XStream's documentation for CVE-2021-21342.

Credits

钟潦贵 (Liaogui Zhong) found and reported the issue to XStream and provided the required information to reproduce it.

For more information

If you have any questions or comments about this advisory:

• Open an issue in XStream
• Contact us at XStream Google Group

Permalink: https://github.com/advisories/GHSA-hvv8-336g-rx3m
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWh2djgtMzM2Zy1yeDNt
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: about 3 years ago
Updated: about 1 year ago

CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Identifiers: GHSA-hvv8-336g-rx3m, CVE-2021-21342
References:

• https://github.com/x-stream/xstream/security/advisories/GHSA-hvv8-336g-rx3m
• https://x-stream.github.io/CVE-2021-21342.html
• https://x-stream.github.io/security.html#workaround
• http://x-stream.github.io/changes.html#1.4.16
• https://nvd.nist.gov/vuln/detail/CVE-2021-21342
• https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
• https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
• https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
• https://security.netapp.com/advisory/ntap-20210430-0002/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/
• https://lists.fedoraproject.org/archives/list/[email protected]/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/
• https://www.oracle.com//security-alerts/cpujul2021.html
• https://www.oracle.com/security-alerts/cpuoct2021.html
• https://lists.fedoraproject.org/archives/list/[email protected]/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/
• https://www.debian.org/security/2021/dsa-5004
• https://www.oracle.com/security-alerts/cpujan2022.html
• https://github.com/advisories/GHSA-hvv8-336g-rx3m

Repository: https://github.com/x-stream/xstream
Blast Radius: 23.4

Affected Packages