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Servers and applications

CVE-2009-4028

The vio_verify_callback function in viosslfactories.c in MySQL 5.0.x before 5.0.88 and 5.1.x before 5.1.41, when OpenSSL is used, accepts a value of zero for the depth of X.509 certificates, which allows man-in-the-middle attackers to spoof arbitrary SSL-based MySQL servers via a crafted certificate, as demonstrated by a certificate presented by a server linked against the yaSSL library.

Severity
Medium 6.8
Published
30 Nov 2009
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
1.8% in the next 30 daysHigher than 78% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper input validation (CWE-20)
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
MySQLServers and applications · cpe:a:oracle:mysql
  • Version 5.1.40-sp1
  • Version 5.1.40
  • Version 5.1.39
  • Version 5.1.38
All 74 release lines
  • Version 5.0.0-alpha
  • Version 5.0.3-beta
  • Version 5.0.6
  • Version 5.0.7
  • Version 5.0.8
  • Version 5.0.11
  • Version 5.0.12
  • Version 5.0.13
  • Version 5.0.14
  • Version 5.0.18
  • Version 5.0.19
  • Version 5.0.21
  • Version 5.0.22
  • Version 5.0.23
  • Version 5.0.25
  • Version 5.0.26
  • Version 5.0.27
  • Version 5.0.30-sp1
  • Version 5.0.32
  • Version 5.0.33
  • Version 5.0.37
  • Version 5.0.38
  • Version 5.0.41
  • Version 5.0.42
  • Version 5.0.45
  • Version 5.0.50
  • Version 5.0.51
  • Version 5.0.52
  • Version 5.0.75
  • Version 5.0.77
  • Version 5.0.81
  • Version 5.0.83
  • Version 5.0.85
  • Version 5.0.86
  • Version 5.1
  • Version 5.1.1
  • Version 5.1.2
  • Version 5.1.3
  • Version 5.1.4
  • Version 5.1.6
  • Version 5.1.7
  • Version 5.1.8
  • Version 5.1.9
  • Version 5.1.10
  • Version 5.1.11
  • Version 5.1.12
  • Version 5.1.13
  • Version 5.1.14
  • Version 5.1.15
  • Version 5.1.16
  • Version 5.1.17
  • Version 5.1.18
  • Version 5.1.19
  • Version 5.1.20
  • Version 5.1.21
  • Version 5.1.22
  • Version 5.1.23-a
  • Version 5.1.24
  • Version 5.1.25
  • Version 5.1.26
  • Version 5.1.27
  • Version 5.1.28
  • Version 5.1.29
  • Version 5.1.30
  • Version 5.1.31-sp1
  • Version 5.1.33
  • Version 5.1.34-sp1
  • Version 5.1.35
  • Version 5.1.36
  • Version 5.1.37-sp1
  • Version 5.1.38
  • Version 5.1.39
  • Version 5.1.40
  • Version 5.1.40-sp1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-4028
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-4028