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Servers and applications

CVE-2003-0147

OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain the server's private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms ("Karatsuba" and normal).

Severity
Medium 5.0
Published
31 Mar 2003
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
7.1% in the next 30 daysHigher than 94% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Read some data
CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 0.9.7a
  • Version 0.9.7
  • Version 0.9.6i
  • Version 0.9.6h
All 11 release lines
  • Version 0.9.6
  • Version 0.9.6a
  • Version 0.9.6b
  • Version 0.9.6c
  • Version 0.9.6d
  • Version 0.9.6e
  • Version 0.9.6g
  • Version 0.9.6h
  • Version 0.9.6i
  • Version 0.9.7
  • Version 0.9.7a

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2003-0147
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2003-0147