Debian: CVE-2017-3737: openssl1.0 -- security update
|4||(AV:N/AC:M/Au:N/C:P/I:N/A:N)||December 07, 2017||December 20, 2017||January 17, 2018|
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.
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- Oracle Solaris 11: CVE-2017-3737: Vulnerability in OpenSSL
- IBM AIX: openssl_advisory25 (CVE-2017-3737): Vulnerabilities in OpenSSL affects AIX
- FreeBSD: VID-9F7A0F39-DDC0-11E7-B5AF-A4BADB2F4699 (CVE-2017-3737): FreeBSD -- OpenSSL multiple vulnerabilities
- OpenSSL Read/write after SSL object in error state (CVE-2017-3737)
- SUSE: CVE-2017-3737: SUSE Linux Security Advisory
- Ubuntu: USN-3512-1 (CVE-2017-3737): OpenSSL vulnerabilities
- Gentoo Linux: CVE-2017-3737: OpenSSL: Multiple vulnerabilities
- Alpine Linux: CVE-2017-3737: openssl Multiple vulnerabilities