OpenSSL 1.0.2 (starting from version 1.0.2b) introduced an "error state" mechanism. The intent was that if a fatal error occurred during a handshake then OpenSSL would move into the error state and would immediately fail if you attempted to continue the handshake. This works as designed for the explicit handshake functions (SSL_do_handshake(), SSL_accept() and SSL_connect()), however due to a bug it does not work correctly if SSL_read() or SSL_write() is called directly. In that scenario, if the handshake fails then a fatal error will be returned in the initial function call. If SSL_read()/SSL_write() is subsequently called by the application for the same SSL object then it will succeed and the data is passed without being decrypted/encrypted directly from the SSL/TLS record layer. In order to exploit this issue an application bug would have to be present that resulted in a call to SSL_read()/SSL_write() being issued after having already received a fatal error. OpenSSL version 1.0.2b-1.0.2m are affected. Fixed in OpenSSL 1.0.2n. OpenSSL 1.1.0 is not affected.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
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openssl openssl 1.0.2c |
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openssl openssl 1.0.2d |
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openssl openssl 1.0.2e |
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openssl openssl 1.0.2l |
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openssl openssl 1.0.2m |
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openssl openssl 1.0.2b |
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openssl openssl 1.0.2j |
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openssl openssl 1.0.2k |
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openssl openssl 1.0.2h |
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openssl openssl 1.0.2i |
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openssl openssl 1.0.2f |
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openssl openssl 1.0.2g |
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debian debian linux 9.0 |
Java fixes lobbed out, Spectre Solaris patches issued Flash! Ah-ahhh! WebEx pwned for all of us!
Oracle this week emitted its April security update, addressing a total of 254 security vulnerabilities across dozens of products. Among the more noteworthy patches is a fix for lingering Spectre-related vulnerabilities in Solaris systems – specifically, CVE-2017-5753, also known as Spectre variant 1. Oracle had mitigated most of the Spectre/Meltdown processor design bugs in its products back in January. This update applies further fixes for Solaris versions 10 and 11.3. Java was on the receivi...
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