Deserialization in Vapor
CVE-2021-32742
Vapor is a web framework for Swift. In versions 4.47.1 and prior, bug in the `Data.init(base32Encoded:)` function opens up the potential for exposing server memory and/or crashing the server (Denial of Service) for applications where untrusted data can end up in said function. Vapor does not currently use this function itself so this only impact applications that use the impacted function directly or through other dependencies. The vulnerability is patched in version 4.47.2. As a workaround, one may use an alternative to Vapor's built-in `Data.init(base32Encoded:)`.
Vulnerability class: Insecure Deserialization
EPSS: 0.012 (65.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Vapor — versions <= 4.47.1
- Vapor_project Vapor
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2021-32742?
- CVE-2021-32742 is a high-severity vulnerability in Vapor, classified under Deserialization of Untrusted Data. CVSS score: 7.5/10. Published 2021-07-09.
- How severe is CVE-2021-32742?
- High severity. CVSS v3 base score is 7.5 out of 10.