CVE-2021-27277: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-jv8c-r873-24qg
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CWE-502
Published
Advisory Summary

CVE-2021-27277 is a HIGH security vulnerability vulnerability (CWE-502: Deserialization of Untrusted Data) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.. Remediation is available in the latest vendor maintenance releases.

CVE-2021-27277 at a Glance

CVE Identifier CVE-2021-27277
GHSA Identifier GHSA-jv8c-r873-24qg
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-502: Deserialization of Untrusted Data
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2021-27277

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2021-27277, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-502: Deserialization of Untrusted Data, where the product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

This vulnerability allows local attackers to escalate privileges on affected installations of SolarWinds Orion Virtual Infrastructure Monitor 2020.2. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the OneTimeJobSchedulerEventsService WCF service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-11955.

References

NVD — CVE-2021-27277 NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-27277
documentation.solarwinds.com/en/success_center/s... WEB
https://documentation.solarwinds.com/en/Success_Center/SAM/Content/Release_Notes/SAM_2020-2-5_release_notes.htm#Fixed
www.zerodayinitiative.com/advisories/zdi-21-3... WEB
https://www.zerodayinitiative.com/advisories/ZDI-21-373

Frequently Asked Questions

What is CVE-2021-27277?
CVE-2021-27277 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-502: Deserialization of Untrusted Data.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2021-27277?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2021-27277?
CVE-2021-27277 is classified under CWE-502: Deserialization of Untrusted Data (The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.).
How can I check Maven dependencies for CVE-2021-27277?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-jv8c-r873-24qg",
  "modified" : "2022-05-24T17:48:19Z",
  "published" : "2022-05-24T17:48:19Z",
  "aliases" : [ "CVE-2021-27277" ],
  "details" : "This vulnerability allows local attackers to escalate privileges on affected installations of SolarWinds Orion Virtual Infrastructure Monitor 2020.2. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the OneTimeJobSchedulerEventsService WCF service. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-11955.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-27277"
  }, {
    "type" : "WEB",
    "url" : "https://documentation.solarwinds.com/en/Success_Center/SAM/Content/Release_Notes/SAM_2020-2-5_release_notes.htm#Fixed"
  }, {
    "type" : "WEB",
    "url" : "https://www.zerodayinitiative.com/advisories/ZDI-21-373"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-502" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2021-04-22T18:15:00Z"
  }
}