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5 vulnerabilities by cryptlib
VAR-200303-0010
Vulnerability from variot - Updated: 2025-04-03 22:37OpenSSL 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). Cryptographic libraries and applications do not provide adequate defense against a side-channel timing attack against RSA private keys. Such an attack has been shown to be practical using currently available hardware on systems and networks with sufficiently low variance in latency. OpenSSL so RSA Is used for the encryption algorithm, RSA There is a vulnerability that is subject to timing attacks that can analyze the private key by measuring and analyzing the processing time when generating the private key in the format.The server's private key may be obtained. A side-channel attack in the OpenSSL implementation has been published in a recent paper that may ultimately result in an active adversary gaining the RSA private key of a target server. The attack involves analysis of the timing of certain operations during client-server session key negotiation
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CVE-2024-0202 (GCVE-0-2024-0202)
Vulnerability from nvd – Published: 2024-02-05 20:44 – Updated: 2026-03-16 19:49 Disputed
VLAI
Title
Cryptlib: rsa key exchange ciphersuites in tls vulnerable to marvin attack
Summary
A security vulnerability has been identified in the cryptlib cryptographic library when cryptlib is compiled with the support for RSA key exchange ciphersuites in TLS (by setting the USE_RSA_SUITES define), it will be vulnerable to the timing variant of the Bleichenbacher attack. An attacker that is able to perform a large number of connections to the server will be able to decrypt RSA ciphertexts or forge signatures using server's certificate. THIS CVE ID IS CURRENTLY DISPUTED - MAINTAINER NOTE: There are only two situations where it's enabled, one is for fuzz-testing to exercise code paths that wouldn't otherwise be available, the other is for static source code analysis with tools like Coverity and Prefast, again to open up code paths that otherwise wouldn't be available. It can also be enabled manually in two specific test builds just to make sure the code still compiles OK, to avoid bit rot and verify that the fuzz-testing build will compile without errors.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2256518 | issue-trackingx_refsource_REDHAT |
Date Public
2024-01-02 00:00
Credits
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CVE-2018-12433 (GCVE-0-2018-12433)
Vulnerability from nvd – Published: 2018-06-15 02:00 – Updated: 2024-09-16 19:35 Disputed
VLAI
Summary
cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model
Severity
No CVSS data available.
CWE
- n/a
Assigner
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1 reference
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CVE-2024-0202 (GCVE-0-2024-0202)
Vulnerability from cvelistv5 – Published: 2024-02-05 20:44 – Updated: 2026-03-16 19:49 Disputed
VLAI
Title
Cryptlib: rsa key exchange ciphersuites in tls vulnerable to marvin attack
Summary
A security vulnerability has been identified in the cryptlib cryptographic library when cryptlib is compiled with the support for RSA key exchange ciphersuites in TLS (by setting the USE_RSA_SUITES define), it will be vulnerable to the timing variant of the Bleichenbacher attack. An attacker that is able to perform a large number of connections to the server will be able to decrypt RSA ciphertexts or forge signatures using server's certificate. THIS CVE ID IS CURRENTLY DISPUTED - MAINTAINER NOTE: There are only two situations where it's enabled, one is for fuzz-testing to exercise code paths that wouldn't otherwise be available, the other is for static source code analysis with tools like Coverity and Prefast, again to open up code paths that otherwise wouldn't be available. It can also be enabled manually in two specific test builds just to make sure the code still compiles OK, to avoid bit rot and verify that the fuzz-testing build will compile without errors.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-208 - Observable Timing Discrepancy
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2256518 | issue-trackingx_refsource_REDHAT |
Date Public
2024-01-02 00:00
Credits
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CVE-2018-12433 (GCVE-0-2018-12433)
Vulnerability from cvelistv5 – Published: 2018-06-15 02:00 – Updated: 2024-09-16 19:35 Disputed
VLAI
Summary
cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model
Severity
No CVSS data available.
CWE
- n/a
Assigner
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