Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS03Nm13LTZwOTUteDl4Nc4ABAOn

pac4j-core affected by a Java deserialization vulnerability

pac4j is a security framework for Java. pac4j-core prior to version 4.0.0 is affected by a Java deserialization vulnerability. The vulnerability affects systems that store externally controlled values in attributes of the UserProfile class from pac4j-core. It can be exploited by providing an attribute that contains a serialized Java object with a special prefix {#sb64} and Base64 encoding. This issue may lead to Remote Code Execution (RCE) in the worst case. Although a RestrictedObjectInputStream is in place, that puts some restriction on what classes can be deserialized, it still allows a broad range of java packages and potentially exploitable with different gadget chains. pac4j versions 4.0.0 and greater are not affected by this issue. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Permalink: https://github.com/advisories/GHSA-76mw-6p95-x9x5
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS03Nm13LTZwOTUteDl4Nc4ABAOn
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: 4 months ago
Updated: 4 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Percentage: 0.00045
EPSS Percentile: 0.17523

Identifiers: GHSA-76mw-6p95-x9x5, CVE-2023-25581
References:

• https://nvd.nist.gov/vuln/detail/CVE-2023-25581
• https://github.com/frohoff/ysoserial
• https://github.com/pac4j/pac4j/blob/5834aeb22ad3a4369dfa572be60d7b20f5784a8f/pac4j-core/src/main/java/org/pac4j/core/profile/InternalAttributeHandler.java#L95
• https://portswigger.net/web-security/deserialization
• https://securitylab.github.com/advisories
• https://securitylab.github.com/advisories/GHSL-2022-085_pac4j
• https://github.com/advisories/GHSA-76mw-6p95-x9x5

Repository: https://github.com/frohoff/ysoserial
Blast Radius: 25.1

Affected Packages