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CVE-2003-0147

OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain...

5.0 MediumFix available

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).

Exploit likelihood

7.06%Down 0.5 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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).

Record
CVE-2003-0147
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Updated
2026-11-02
CVE List No score

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).

Record
CVE-2003-0147
Updated
2026-11-02
EUVDEUVD-2003-0143 No score

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).

Record
EUVD-2003-0143
Updated
2026-11-03
GitHub AdvisoriesGHSA-4q57-g9fh-w67x No score

OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain...

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).

Record
GHSA-4q57-g9fh-w67x
Updated
2026-11-02
OSV No score

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).

Record
CVE-2003-0147
Updated
2026-11-02
OSVDEBIAN-CVE-2003-0147 No score

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).

Record
DEBIAN-CVE-2003-0147
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openssl
Debian:12
before 0.9.7b-1
0.9.7b-1
openssl
Debian:13
before 0.9.7b-1
0.9.7b-1
openssl
Debian:14
before 0.9.7b-1
0.9.7b-1
openssl
Debian:3.0
before 0.9.6c-2.woody.3
0.9.6c-2.woody.3

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2003-0147 is a medium vulnerability (CVSS 5.0) in Openssl, published March 18, 2003. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.06%, the 94th percentile. Fixed in openssl 0.9.7b-1.

References

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