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Servers and applications

CVE-2011-0014

ssl/t1_lib.c in OpenSSL 0.9.8h through 0.9.8q and 1.0.0 through 1.0.0c allows remote attackers to cause a denial of service (crash), and possibly obtain sensitive information in applications that use OpenSSL, via a malformed ClientHello handshake message that triggers an out-of-bounds memory access, aka "OCSP stapling vulnerability."

Severity
Medium 5.0
Published
19 Feb 2011
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
9.9% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-399
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 1.0.0c
  • Version 1.0.0b
  • Version 1.0.0a
  • Version 1.0.0
All 19 release lines
  • Version 0.9.8h
  • Version 0.9.8i
  • Version 0.9.8j
  • Version 0.9.8k
  • Version 0.9.8l
  • Version 0.9.8m
  • Version 0.9.8n
  • Version 0.9.8o
  • Version 0.9.8p
  • Version 0.9.8q
  • Version 1.0.0-beta1
  • Version 1.0.0-beta2
  • Version 1.0.0-beta3
  • Version 1.0.0-beta4
  • Version 1.0.0-beta5
  • Version 1.0.0
  • Version 1.0.0a
  • Version 1.0.0b
  • Version 1.0.0c

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-0014
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-0014