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NVD / CVE Program· CNA mitre

CVE-2009-1711: WebKit in Apple Safari before 4.0 does not properly initialize memory for Attr DOM objects, which allows remote attackers to execute arbitra

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 6.6% (FIRST EPSS); higher than 93.8% of all records.
  • Fixed version: qt4-x11 (Debian:5.0) 4.4.3-1+lenny1; webkit (Debian:5.0) 1.0.1-4+lenny2.

Low priority for now. Upgrade to qt4-x11 (Debian:5.0) 4.4.3-1+lenny1; webkit (Debian:5.0) 1.0.1-4+lenny2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

WebKit in Apple Safari before 4.0 does not properly initialize memory for Attr DOM objects, which allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted HTML document.

CriticalCVSS 9.3 · v2.0—No exploit Fix available
Published
Jun 10, 2009
Updated
Jun 16, 2026
EPSS
6.6% · 93th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 6.6%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2009-1711

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
applesafari

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • apple safariup to 3.2.3 inclusive
  • apple safariup to 4.0_beta inclusive
  • apple safari0.8
  • apple safari0.9
  • apple safari1.0
  • apple safari1.0.3
  • apple safari1.1
  • apple safari1.2
  • apple safari1.3
  • apple safari1.3.1
  • apple safari1.3.2
  • apple safari2.0
  • apple safari2.0.2
  • apple safari2.0.4
  • apple safari3.0
  • apple safari3.0.1
  • apple safari3.0.2
  • apple safari3.0.3
  • apple safari3.0.4
  • apple safari3.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:5.0qt4-x11before 4.4.3-1+lenny14.4.3-1+lenny1
Debian:5.0webkitbefore 1.0.1-4+lenny21.0.1-4+lenny2

Same product

apple: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-43529A use-after-free issue was addressed with improved memory management.KEV
    73This week
  • CVE-2023-28205A use after free issue was addressed with improved memory management.KEV
    73This week
  • CVE-2023-32439A type confusion issue was addressed with improved checks.KEV
    72This week

Published before and after this one in the same product

  • ← EarlierCVE-2009-1709Jun 10, 2009 · Use-after-free vulnerability in the garbage-collection implementation in WebCore in WebKit in Apple Safari before 4.0 allows remote attacker
    39Monitor
  • ← EarlierCVE-2009-1710Jun 10, 2009 · WebKit in Apple Safari before 4.0 allows remote attackers to spoof the browser's display of (1) the host name, (2) security indicators, and
    11Monitor
  • Later →CVE-2009-1712Jun 10, 2009 · WebKit in Apple Safari before 4.0 does not prevent remote loading of local Java applets, which allows remote attackers to execute arbitrary
    39Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:qt4-x114.4.3-1+lenny1 · Debian:5.0Package registry (OSV)
debian:webkit1.0.1-4+lenny2 · Debian:5.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    C · data can be read
    Integrity
    C · data or configuration can be modified
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    C
    Integrity impact
    C
    Availability impact
    C

    Weakness class (CWE)

    CWE-399 · Resource Management Errors

    CVSS vector

    AV:N/AC:M/Au:N/C:C/I:C/A:C

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    MITRE has no CAPEC/ATT&CK mapping for this CWE.

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Show all references (15 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records