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CVE-2009-2700· NVD / CVE Program· CNA mitre

src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '\0' character in a domain name in the Subject Alte

Noroxi assessment

Priority: Monitor (action score 17/100)

  • 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: 0.94% (FIRST EPSS); higher than 60.6% of all records.
  • Fixed version: qt4-x11 (Debian:5.0) 4.4.3-1+lenny1.

Low priority for now. Upgrade to qt4-x11 (Debian:5.0) 4.4.3-1+lenny1 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

src/network/ssl/qsslcertificate.cpp in Nokia Trolltech Qt 4.x does not properly handle a '\0' character in a domain name in the Subject Alternative Name field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

MediumCVSS 4.3 · v2.0—No exploit Fix available
Published
Sep 2, 2009
Updated
Jun 16, 2026
EPSS
0.9% · 60th percentile

Report tools

JSON

Action score

17

Monitor

Low priority for now.

CVSS
17 / 40 · 4.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.9%

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.

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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
qtqt

Affected versions

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

  • qt qt4.0.0
  • qt qt4.0.1
  • qt qt4.1.0
  • qt qt4.1.1
  • qt qt4.1.2
  • qt qt4.1.3
  • qt qt4.1.4
  • qt qt4.1.5
  • qt qt4.2.0
  • qt qt4.2.1
  • qt qt4.2.3
  • qt qt4.3.0
  • qt qt4.3.1
  • qt qt4.3.2
  • qt qt4.3.3
  • qt qt4.3.4
  • qt qt4.3.5
  • qt qt4.4.0
  • qt qt4.4.1
  • qt qt4.4.2

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

Same product

qt: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-12267setMarkdown in Qt before 5.14.2 has a use-after-free related to QTextMarkdownImporter::insertBlock.
    40Plan
  • CVE-2018-19873An issue was discovered in Qt before 5.11.3.
    40Plan
  • CVE-2017-10904Qt for Android prior to 5.9.0 allows remote attackers to execute arbitrary OS commands via unspecified vectors.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2006-4811Oct 18, 2006 · Integer overflow in Qt 3.3 before 3.3.7, 4.1 before 4.1.5, and 4.2 before 4.2.1, as used in the KDE khtml library, kdelibs 3.1.3, and possib
    28Monitor
  • ← EarlierCVE-2007-0242Apr 3, 2007 · The UTF-8 decoder in codecs/qutfcodec.cpp in Qt 3.3.8 and 4.2.3 does not reject long UTF-8 sequences as required by the standard, which allo
    18Monitor
  • Later →CVE-2010-2621Jul 2, 2010 · The QSslSocketBackendPrivate::transmit function in src_network_ssl_qsslsocket_openssl.cpp in Qt 4.6.3 and earlier allows remote attackers to
    23Monitor

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-x114:4.5.3-1 · Debian:10Package registry (OSV)
debian:qt4-x114.4.3-1+lenny1 · 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.

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
    none
    Integrity
    P · data or configuration can be modified
    Availability
    none
    Attack complexity
    M
    Confidentiality impact
    None
    Integrity impact
    P
    Availability impact
    None

    Weakness class (CWE)

    CWE-20 · Improper Input Validation

    CVSS vector

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

    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.

    Change log

    1. Fix✗ → ✓

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

    References

    Show all references (6 more)

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

    All records