CVE-2023-44469 — A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::N

A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before 2.17.1 allows authenticated remote attackers to send GET requests to arbitrary URLs through the request_uri authorization parameter. This is similar to CVE-2020-10770.

01What is this vulnerability?

A Server-Side Request Forgery issue in the OpenID Connect Issuer in LemonLDAP::NG before 2.17.1 allows authenticated remote attackers to send GET requests to arbitrary URLs through the request_uri authorization parameter. This is similar to CVE-2020-10770.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2023-09-29T00:00:00.000Z
• Last modified: 2024-09-23T16:32:58.941Z

09References

• gitlab.ow2.org — https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/issues/2998
• security.lauritz-holtmann.de — https://security.lauritz-holtmann.de/post/sso-security-ssrf/
• gitlab.ow2.org — https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/releases/v2.17.1
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2023/10/msg00014.html