CVE-2009-4484
HighPublic exploitmysql: yaSSL certificate parsing buffer overflow (vulndisco)
Published Jan 25, 2010 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2009-4484 is a high-severity vulnerability (CVSS 7.5 v2) affecting Mariadb, Mysql (Oracle), Yassl (Wolfssl) and 4 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 70% probability of exploitation in the next 30 days.
- Fixed versions are available, including kernel 5.10.57.1-1, Mariadb 5.1.42, mysql-dfsg-5.0 5.0.32-7etch12.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
70%
Higher than 99.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2009-4484 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
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.
Affected Products
19 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| MariadbMariadb | See advisory | 5.1.42 |
| MysqlOracle | 5.0.0-milestone1, 5.0.0-milestone2 | 5.0.90 |
| YasslWolfssl | See advisory | 1.9.9 |
| Ubuntu LinuxCanonical | 10.04, 10.10, 11.04, 11.10, 6.06, 8.04, 8.10, 9.04 | n/a |
| Debian LinuxDebian | 4.0, 5.0, 6.0 | n/a |
Patched Releases
kernel
5.10.57.1-1
Mariadb
5.1.42
mysql-dfsg-5.0
5.0.32-7etch12, 5.0.51a-24+lenny3
Mysql
5.0.90
Yassl
1.9.9
Timeline
Publicly disclosed
Jan 25, 2010
Last updated
Mar 9, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
- CWE-228 Improper Handling of Syntactically Invalid Structure
- CWE-787 Out-of-bounds Write
References
- advisoryhttp://isc.sans.org/diary.html?storyid=7900
- advisoryhttps://bugzilla.redhat.com/show_bug.cgi?id=555313
- advisory37493
- advisory38344
- advisory38364
FAQ
Common Questions.
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…
Affected: Mariadb; Mysql (Oracle) versions 5.0.0-milestone1, 5.0.0-milestone2; Yassl (Wolfssl), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including kernel 5.10.57.1-1, Mariadb 5.1.42, mysql-dfsg-5.0 5.0.32-7etch12.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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