GHSA-8w7w-67mw-r5p7

generator-jhipster vulnerable to login check Regular Expression Denial of Service

No score

GHSA-8w7w-67mw-r5p7 is a vulnerability with no CVSS score yet in generator-jhipster, published October 6, 2022. No source lists public exploit code. No source names a fixed version.

What does this mean?

Severity: UnratedNo CVSS score yet
Exploit chance: UnscoredNo EPSS score yet
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: No fix listedNo source names one

Description

Impact

For applications using JWT or session-based authentication (not OIDC), users can input a login string which can cause a denial of service, as parsing it will be too complex.

Here is an example: https://gist.github.com/atomfrede/311f8a9c6eb74c5c5226af0481155207

The vulnerable expression was never officially released. So only when you generated an application from the master branch between 6.8.0 and 6.9.0 your generated application may be vulnerable.

Patches

If you only used official releases you don't need to patch your application.

Workarounds

If you have created an application from the master branch, you need to adapt the LOGIN_REGEX in Constants.java. If your regex is

^[a-zA-Z0-9!#$&'*+=?^_`{|}~.-]+@?[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$

you need to change it too

^(?>[a-zA-Z0-9!$&*+=?^_`{|}~.-]+@[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*)|(?>[_.@A-Za-z0-9-]+)$

If you still have ^[_.@A-Za-z0-9-]*$ there is no need to change it, except you would like to support login with + sign (e.g. foo+bar@example.com).

References

Affected packages

Affected packages
Package	Affected	Fixed
`generator-jhipster` npm	Source text: > 6.8.0, < 6.9.0	Not evaluated

Not evaluated means the source gave git commits or a range we can't read, so we can't tell which releases are affected. A fixed version beside it is the source’s own claim.

What each source reports

GitHub AdvisoriesNo score

generator-jhipster vulnerable to login check Regular Expression Denial of Service