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Servers and applications

CVE-2002-0656

Buffer overflows in OpenSSL 0.9.6d and earlier, and 0.9.7-beta2 and earlier, allow remote attackers to execute arbitrary code via (1) a large client master key in SSL2 or (2) a large session ID in SSL3.

Severity
High 7.5
Published
12 Aug 2002
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
90% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Read some data · Change some data · Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 0.9.7-beta2
  • Version 0.9.7-beta1
  • Version 0.9.6d
  • Version 0.9.6c
All 13 release lines
  • Version 0.9.1c
  • Version 0.9.2b
  • Version 0.9.3
  • Version 0.9.4
  • Version 0.9.5
  • Version 0.9.5a
  • Version 0.9.6
  • Version 0.9.6a
  • Version 0.9.6b
  • Version 0.9.6c
  • Version 0.9.6d
  • Version 0.9.7-beta1
  • Version 0.9.7-beta2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2002-0656
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2002-0656