Security Bulletin
Summary
Regular expressions are a formal language for identifying strings of text, parsing, and matching them. Most regular expressions engines are built over a non-deterministic Finite Automaton (NFA). They use backtracking and, while these regular expression engines can quickly confirm a positive match, confirming a negative match can take much more longer. There are lots of well-known regular expression patterns that, using selected inputs, take a time exponentially related to input size. An attacker with total or partial control over a regular expression may carry out a denial-of-service (DoS) attack. In certain server-side frameworks like Node.js, the event loop could be blocked, and the app will be unresponsive. The rule checks wether (1) the regular expression is build using untrusted input (in that case, an attacker may inyect a malicious pattern and force a DoS condition when applied to crafted strings), or (2) the coded regular expression contains a structure that may lead to catastrophic backtracking and a DoS condition.
Vulnerability Details
CVEID: CVE-2024-41766
DESCRIPTION: IBM Engineering Lifecycle Optimization - Publishing could allow a remote attacker to cause a denial of service using a complex regular expression.
CWE: CWE-1333: Inefficient Regular Expression Complexity
CVSS Source: IBM X-Force
CVSS Base score: 7.5
CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| PUB | 7.0.3 |
| PUB | 7.0.2 |
Remediation/Fixes
| Product Name | Version | How to remediate? |
| PUB | 7.0.3 | The vulnerability can be remediated by applying the following PUB 7.0.3 iFix010 or later iFixes. |
| PUB | 7.0.2 | The vulnerability can be remediated by applying the following PUB 7.0.2 iFix032 or later iFixes. |
Workarounds and Mitigations
None
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
03 Jan 2025: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
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Document Location
Worldwide
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Document Information
Modified date:
03 January 2025
UID
ibm17180203