CVE-2009-1648
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe YaST2 LDAP module in yast2-ldap-server on SUSE Linux Enterprise Server 11 (aka SLE11) does not enable the firewall in certain circumstances involving reboots during online updates, which makes it easier for remote attackers to access network services.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThe YaST2 LDAP module in yast2-ldap-server on SUSE Linux Enterprise Server 11 fails to properly enable the firewall after system reboots that occur during online updates. This leaves network services exposed to remote attackers who could otherwise be blocked by firewall rules.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 11CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Verify yast2-ldap-server package is installedRun 'rpm -q yast2-ldap-server' or check via YaST2 Software ManagementAffected if The package is installed and the system has the vulnerable component
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Confirm firewall service is enabled and runningRun 'systemctl status SuSEfirewall2' or 'rcSuSEfirewall2 status' on SLE 11Affected if Firewall service is not running or not enabled at boot
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Check if LDAP service ports are open in firewall rulesRun 'SuSEfirewall2 status' or inspect /etc/sysconfig/SuSEfirewall2 for 'FW_SERVICES_EXT_TCP' containing 'ldap' or ports 389,636Affected if LDAP ports (389, 636) are not explicitly allowed or firewall blocks them unnecessarily after reboot
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Verify firewall rules persist across rebootsCheck /etc/sysconfig/SuSEfirewall2 configuration and test by reviewing if rules are reapplied after a reboot cycleAffected if Firewall rules are not reliably applied after reboot, especially following online updates
A user is affected if yast2-ldap-server is installed on SLE 11 AND the firewall is not consistently enabled or LDAP ports are not properly configured to persist after reboots during online updates.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataManually configure and verify firewall rules are enabled for LDAP services, or implement a startup script to ensure firewall rules are applied after each reboot regardless of update status.
- Consultation2.0 h
- Implementation2.0 h
- Testing1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2009-1648 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2009-1648 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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