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CVE-2009-4484· NVD / CVE Program· CNA mitre

Multiple stack-based buffer overflows in the CertDecoder::GetName function in src/asn.cpp in TaoCrypt in yaSSL before 1.9.9, as used in mysq

Noroxi assessment

Priority: Plan (action score 51/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 69.5% (FIRST EPSS); higher than 99.3% of all records.
  • No special conditions are required; it is repeatable.
  • Fixed version: mysql-dfsg-5.0 (Debian:4.0) 5.0.32-7etch12; mysql-dfsg-5.0 (Debian:5.0) 5.0.51a-24+lenny3.

Add it to your regular patch cycle. Upgrade to mysql-dfsg-5.0 (Debian:4.0) 5.0.32-7etch12; mysql-dfsg-5.0 (Debian:5.0) 5.0.51a-24+lenny3 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

Multiple stack-based buffer overflows in the CertDecoder::GetName function in src/asn.cpp in TaoCrypt in yaSSL before 1.9.9, as used in mysqld in MySQL 5.0.x before 5.0.90, MySQL 5.1.x before 5.1.43, MySQL 5.5.x through 5.5.0-m2, and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption and daemon crash) by establishing an SSL connection and sending an X.509 client certificate with a crafted name field, as demonstrated by mysql_overflow1.py and the vd_mysql5 module in VulnDisco Pack Professional 8.11. NOTE: this was originally reported for MySQL 5.0.51a.

HighCVSS 7.5 · v2.0—Weaponized Fix available
Published
Dec 30, 2009
Updated
Jun 16, 2026
EPSS
69.5% · 99th percentile

Report tools

JSON

Action score

51

Plan

Add it to your regular patch cycle.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
21 / 30 · 69.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

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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?

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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
oraclemysql
wolfsslyassl
canonicalubuntu linux
debiandebian linux
mariadbmariadb

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When you'll hear from us

  • when a new CVE affecting this product is published
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Affected versions

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

  • oracle mysql5.0.0 and later · before 5.0.90
  • oracle mysql5.1.0 and later · before 5.1.43
  • oracle mysql5.0.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:4.0mysql-dfsg-5.0before 5.0.32-7etch125.0.32-7etch12
Debian:5.0mysql-dfsg-5.0before 5.0.51a-24+lenny35.0.51a-24+lenny3

Same product

oracle: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-6662Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before 10.0.27, and 10.1.x before
    59Plan
  • CVE-2017-3599Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Pluggable Auth).
    57Plan
  • CVE-2022-21489Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).
    49Plan

Published before and after this one in the same product

  • ← EarlierCVE-2007-5970Dec 10, 2007 · MySQL 5.1.x before 5.1.23 and 6.0.x before 6.0.4 allows remote authenticated users to gain privileges on arbitrary tables via unspecified ve
    24Monitor
  • ← EarlierCVE-2008-4097Sep 18, 2008 · MySQL 5.0.51a allows local users to bypass certain privilege checks by calling CREATE TABLE on a MyISAM table with modified (1) DATA DIRECTO
    19Monitor
  • Later →CVE-2010-2008Jul 13, 2010 · MySQL before 5.1.48 allows remote authenticated users with alter database privileges to cause a denial of service (server crash and database
    17Monitor

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:mysql-dfsg-5.05.0.32-7etch12 · Debian:4.0Package registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entryremote2010-04-30
Metasploit moduleexploit/linux/mysql/mysql_yassl_getnameMySQL yaSSL CertDecoder::GetName Buffer Overflowexploit2010-01-25

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.

  1. Published
  2. Metasploit+25 d
  3. First PoC+120 d
  4. TodayOct 19, 2026+6137 d
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

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

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✗ → ✓

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References

Show all references (19 more)

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

All records