CVE-2021-39146
XStream is vulnerable to an Arbitrary Code Execution attack
Exploitation likely. EPSS gives it a 14% chance of exploitation in the next 30 days. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to load and execute arbitrary code from a remote host only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
14% chance of exploitation activity in the next 30 days, which ranks it in the 96th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
10 events over 1767 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changehigh → moderate
- EPSS band changemoderate → high
- EPSS band changehigh → moderate
- Nuclei check added
- Patch availablerecord updated
Affected products
- business activity monitoringEnterprise Software / itsm-monitoring
- commerce guided searchDatabases / data-warehouse-analytics
- communications billing and revenue management elastic charging engineEnterprise Software / itsm-monitoring
- communications cloud native core automated test suiteDatabases / data-warehouse-analytics
- communications cloud native core binding support functionCommunications
- communications cloud native core policyDatabases / cache-message-queue
- communications unified inventory managementEnterprise Software / itsm-monitoring
- retail xstore point of serviceDatabases / cache-message-queue
And 4 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Scored 8.5 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- github.com/x-stream/xstream/security/advisories/GHSA-p8pq-r894-fm8f
- lists.debian.org/debian-lts-announce/2021/09/msg00017.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/
And 14 more references. See all after sign-in
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