What is CVE-2009-1227?A critical-severity flaw in Firewall-1 PKI Web Service, explained.
CVE-2009-1227 is a critical-severity flaw (CVSS 10.0) in Firewall-1 PKI Web Service from Checkpoint, published on 2 April 2009. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 7.2%. If you run an affected version, plan in the vendor’s fix.
Published 2 April 2009. Record last updated 16 June 2026. We keep this page's data up to date.
What is CVE-2009-1227? In plain terms.
It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read data, change data and take it offline.
NOTE: this issue has been disputed by the vendor. Buffer overflow in the PKI Web Service in Check Point Firewall-1 PKI Web Service allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long (1) Authorization or (2) Referer HTTP header to TCP port 18624. NOTE: the vendor has disputed this issue, stating "Check Point Security Alert Team has analyzed this report. We've tried to reproduce the attack on all VPN-1 versions from NG FP2 and above with and without HFAs. The issue was not reproduced. We have conducted a thorough analysis of the relevant code and verified that we are secure against this attack. We consider this attack to pose no risk to Check Point customers." In addition, the original researcher, whose reliability is unknown as of 20090407, also states that the issue "was discovered during a pen-test where the client would not allow further analysis.
What kind of flaw is it?
- CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
How an attack on it works
Read straight from its severity rating, translated out of the shorthand.
- Where an attacker can beAnywhere on the internet
- How hard it is to pull offEasy: no special conditions
- Login needed firstNo login needed
- What an attacker getsCan read data, change data and take it offline
Severity vector: AV:N/AC:L/Au:N/C:C/I:C/A:C
Is CVE-2009-1227 being exploited? Not that we know of.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 7.2%. That can change at any time, which is why we keep watching.
Timeline
- Published
- Exploit likelihood jumped
- Record last updated
CVE-2009-1227 scores 55. Action: Plan remediation.
We keep the score of every published flaw up to date as the evidence changes. Four things go into the score, and evidence that criminals are actually using it counts most. In order:
- Evidence it is being exploitedBiggest factor
- How severe it isStrong factor
- How widely exposed it isSmaller factor
- Threat activity around itSmaller factor
85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score.
When CVE-2009-1227 matches software you track, it lands in your list with its score and the reasons behind it.
See your own ranked list →Who is affected by CVE-2009-1227? One product.
The published record lists 1 product from 1 vendor. If you run one of these, check your version, then go to the fix below.
- Application
Firewall-1 PKI Web Service
by Checkpoint
Affected versionsversion not specified
How do I fix CVE-2009-1227? Four steps.
- Check whether you run itCompare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
- Apply the vendor’s fixInstall the latest update from the vendor. The references list where the vendor has published details.
- If you can’t patch todayFollow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
- Keep an eye on itTrack the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.
Does CVE-2009-1227 affect you? We'll keep checking.
Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.
- Tell us what you runPick your software from a list, or let us work it out from your website.
- We match it to every flawOver 400,000 published flaws, checked against your list.
- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
- Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
Free plan, no card needed. Nothing to install.
1 new flaw affects software Acme tracks
NOTE: this issue has been disputed by the vendor. Buffer overflow in the PKI Web Service in Check Point Firewall-1 PKI Web Service allows remote attackers to...
- Matched to
- Firewall-1 PKI Web Service on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
CVE-2009-1227 is a critical-severity flaw in Firewall-1 PKI Web Service from Checkpoint, published on 2 April 2009. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read data, change data and take it offline.
It scores 10.0 out of 10 on the CVSS severity scale, which is critical. Our risk score for CVE-2009-1227 is 55 out of 100, which is Medium. Its action is "Plan remediation". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 7.2%. That can change at any time, which is why we keep watching.
For Firewall-1 PKI Web Service from Checkpoint: version not specified.
Install the update the vendor names in its advisory. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.