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Servers and applications

CVE-2010-4180

OpenSSL before 0.9.8q, and 1.0.x before 1.0.0c, when SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG is enabled, does not properly prevent modification of the ciphersuite in the session cache, which allows remote attackers to force the downgrade to an unintended cipher via vectors involving sniffing network traffic to discover a session identifier.

Severity
Medium 4.3
Published
6 Dec 2010
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Fixed in
0.9.2, 0.9.8q, 1.0.0c
Exploit chance
9.5% in the next 30 daysHigher than 95% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Change some data
CVSS vector
AV:N/AC:M/Au:N/C:N/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
nginxServers and applications · cpe:a:f5:nginx
  • Every version before 0.9.2
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Every version before 0.9.8q
  • From 1.0.0 before 1.0.0c

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2010-4180
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2010-4180