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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWh4Y2MtZjUycC13Yzk0

Insecure serialization leading to RCE in serialize-javascript

serialize-javascript prior to 3.1.0 allows remote attackers to inject arbitrary code via the function "deleteFunctions" within "index.js".

An object such as {"foo": /1"/, "bar": "a\"@__R-<UID>-0__@"} was serialized as {"foo": /1"/, "bar": "a\/1"/}, which allows an attacker to escape the bar key. This requires the attacker to control the values of both foo and bar and guess the value of <UID>. The UID has a keyspace of approximately 4 billion making it a realistic network attack.

Permalink: https://github.com/advisories/GHSA-hxcc-f52p-wc94
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWh4Y2MtZjUycC13Yzk0
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 4 years ago
Updated: about 1 year ago

CVSS Score: 8.1
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Percentage: 0.0073
EPSS Percentile: 0.80529

Identifiers: GHSA-hxcc-f52p-wc94, CVE-2020-7660
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-7660
• https://github.com/yahoo/serialize-javascript/commit/f21a6fb3ace2353413761e79717b2d210ba6ccbd
• https://github.com/advisories/GHSA-hxcc-f52p-wc94

Repository: https://github.com/yahoo/serialize-javascript
Blast Radius: 49.4

Affected Packages