Remote Code execution in SnakeYAML
CVE-2022-1471

9.8CRITICAL

Key Information:

Vendor

Snakeyaml

Status
Snakeyaml
Vendor
CVE Published:
1 December 2022

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 93%

What is CVE-2022-1471?

SnakeYaml's Constructor() class does not restrict types which can be instantiated during deserialization. Deserializing yaml content provided by an attacker can lead to remote code execution. We recommend using SnakeYaml's SafeConsturctor when parsing untrusted content to restrict deserialization. We recommend upgrading to version 2.0 and beyond.

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Deploy the Patch

Affected Version(s)

SnakeYAML 0 <= 2.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

SnakeYAML-CVE-2022-1471-POC
Created by 1fabunicorn

snakeyaml_cve_poc
Created by falconkei

CVE-2022-1471-attacker
Created by jelee2555

References

https://github.com/google/security-research/security/advi...
https://bitbucket.org/snakeyaml/snakeyaml/issues/561/cve-...
https://github.com/mbechler/marshalsec

EPSS Score

93% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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