angular: Inefficient Regular Expression Complexity
CVE-2022-25844 is a high-severity inefficient regular expression complexity vulnerability in angular, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected angular versions: next of 1.7.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 4.93% chance of exploitation within 30 days, which is in the top 7.73% of all scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of angular you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Angular | angular | next of 1.7.0 | Not stated |
| Angularjs | Angularjs | 1.7.0 and later | Not stated |
| Fedora Project | Fedora | 35; 36 | Not stated |
| NetApp | Ontap Select Deploy Administration Utility | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.3 | Medium | CNA (snyk.io) |
| CVSS 3.1 | 7.5 | High | NVD |
| CVSS 2.0 | 5.0 | Medium | NVD |
Official description
The package angular after 1.7.0 are vulnerable to Regular Expression Denial of Service (ReDoS) by providing a custom locale rule that makes it possible to assign the parameter in posPre: ' '.repeat() of NUMBER_FORMATS.PATTERNS[1].posPre with a very high value. **Note:** 1) This package has been deprecated and is no longer maintained. 2) The vulnerable versions are 1.7.0 and higher.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Inefficient Regular Expression Complexity
The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.
How developers prevent this class of flaw
- Use regular expressions that do not support backtracking, e.g. by removing nested quantifiers.
- Set backtracking limits in the configuration of the regular expression implementation, such as PHP's pcre.backtrack_limit. Also consider limits on execution time for the process.
- Do not use regular expressions with untrusted input. If regular expressions must be used, avoid using backtracking in the expression.
More Inefficient Regular Expression Complexity vulnerabilities (CWE-1333)
Timeline
- CVE record published.
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- security.netapp.com/advisory/ntap-20220629-0009/Third Party Advisory
Technical write-ups (may include proof of concept)
- snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-2772736Exploit, Third Party Advisory
- snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBANGULAR-2772738Exploit, Third Party Advisory
- snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2772737Exploit, Third Party Advisory
- snyk.io/vuln/SNYK-JS-ANGULAR-2772735Exploit, Third Party Advisory
- stackblitz.com/edit/angularjs-material-blank-zvtdvbExploit, Third Party Advisory
Other references
Other vulnerabilities in angular
- 8.2 High severity
- 8.2 High severity
- 8.2 High severity
- 8.7 High severity
- 9.1 Critical severity
- 7.5 High severity
Recent Inefficient Regular Expression Complexity vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
- 7.5 High severity
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