Apache Tapestry prior to version 4 (EOL) allows RCE though deserialization of untrusted input

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• apache tapestry3.0.0 and later · before 4.0.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

• Apache Software Foundation Apache Tapestry

  • Apache Tapestry and later · before 4.0.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2021-27850Bypass of the fix for CVE-2019-0195
  67This week
• CVE-2019-0195Manipulating classpath asset file URLs, an attacker could guess the path to a known file in the classpath and have it downloaded.
  43Plan
• CVE-2020-17531Deserialization flaw in EOL Tapestry 4.
  42Plan
• CVE-2019-10071The code which checks HMAC in form submissions used String.equals() for comparisons, which results in a timing side channel for the comparis
  42Plan
• CVE-2014-1972Apache Tapestry before 5.3.6 relies on client-side object storage without checking whether a client has modified an object, which allows rem
  34Monitor
• CVE-2021-30638An Information Disclosure due to insufficient input validation exists in Apache Tapestry 5.4.0 and later
  32Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Data received over the network is deserialized into the language’s native object format without verifying its source. Code paths inside the object can be triggered during deserialization.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1payload = sock.recv(65536)2job = pickle.loads(payload)

1payload = sock.recv(65536)2if not hmac.compare_digest(sign(payload), header_sig):3    raise PermissionError("invalid signature")4job = JobSchema.validate(json.loads(payload))

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.