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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

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.

What does this mean?
Severity
5.0 MediumCVSS 2.0, NVD
Exploit chance
7.06%EPSS, 94th percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
0.9.7b-1openssl +3 more

Description

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%

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
From an advisory covering 2 CVEs
before 0.9.6c-2.woody.3
0.9.6c-2.woody.3

What each source reports

NVD Score used5.0

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 ListNo 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-2003-0143No 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-w67xNo 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
OSVNo 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-2003-0147No 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

History

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

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

References

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