Bug 1870624
| Summary: | RHDS - allow more than 1 empty AttributeDescription for ldapsearch, without the risk of denial of service | ||||||
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| Product: | Red Hat Enterprise Linux 7 | Reporter: | Rainer Beyel <rbeyel> | ||||
| Component: | 389-ds-base | Assignee: | mreynolds | ||||
| Status: | CLOSED ERRATA | QA Contact: | RHDS QE <ds-qe-bugs> | ||||
| Severity: | medium | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 7.9 | CC: | aadhikar, jachapma, mreynolds, msauton, ofalk, pasik, sgouvern, spichugi, tbordaz, tmihinto, vashirov | ||||
| Target Milestone: | rc | Keywords: | TestCaseProvided | ||||
| Target Release: | 7.9 | ||||||
| Hardware: | Unspecified | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | sync-to-jira | ||||||
| Fixed In Version: | 389-ds-base-1.3.10.2-7.1.el7_9 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2020-11-10 13:14:10 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Created attachment 1714123 [details]
Proposed patch for spec and source.
Reproducer: Requesting more than 10 empty attributes will result in an error 2 (protocol error) # ldapsearch -xLLL -b "" -s base cn "" "" "" "" "" "" "" "" "" "" "" Protocol error (2) This should succeed: # ldapsearch -xLLL -b "" -s base cn "" "" "" "" "" "" "" "" "" "" dn: Build tested: 389-ds-base-1.3.10.2-7.1.el7_9.x86_64 # ldapsearch -xLLL -b "" -s base cn "" "" "" "" "" "" "" "" "" "" (max accepted empty value) dn: # ldapsearch -xLLL -b "" -s base cn "" "" dn: LDAP server is allowing more than 1 empty AttributeDescription for ldapsearch, marking as VERIFIED. Build tested: 389-ds-base-1.3.10.2-7.1.el7_9.x86_64 Requesting more than 10 empty attributes is resulting in error 2 (protocol error) #ldapsearch -xLLL -b "" -s base cn "" "" "" "" "" "" "" "" "" "" "" Protocol error (2) Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (389-ds-base bug fix and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2020:5041 |
Description of problem: With RHSA-2018:3127 applied on RHDS, "Cisco Web Security" (Ironport) is no longer able to use RHDS for authentication. The "Cisco Web Security" ldap query contains 3 empty ("") AttributeDescription - with RHSA-2018:3127 applied (from my understanding) only 1 empty AttributeDescription is allowed. Version-Release number of selected component: RHDS 10 with RHSA-2018:3127 applied How reproducible: Configure "Cisco Web Security" to authenticate against RHDS 10 Actual results: "Cisco Web Security" is not able to use RHDS for authentication Expected results: "Cisco Web Security" is able to use RHDS for authentication Allow multiple (e.g. 3) empty ("") AttributeDescription with ldapsearch on RHDS - without the risk of denial of service Additional info: - https://access.redhat.com/security/cve/CVE-2018-14648 - https://access.redhat.com/errata/RHSA-2018:3127 - https://bugzilla.redhat.com/show_bug.cgi?id=1630668 - ldap error "conn=12345678 op=0 SRCH base="dc=xxx,dc=xxx,dc=xxx" scope=2 filter="(&(objectClass=posixAccount)(uid=xxx))", invalid attribute request" - Excerpt from tcpdump: ... protocolOp: searchRequest (3) ... attributes: 7 items AttributeDescription: gecos AttributeDescription: AttributeDescription: AttributeDescription: AttributeDescription: memberOf AttributeDescription: DN AttributeDescription: CN ...