CVE-2017-3737 (GCVE-0-2017-3737)

Vulnerability from cvelistv5 – Published: 2017-12-07 16:00 – Updated: 2024-09-17 03:53
VLAI?
Summary
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.
Severity ?
No CVSS data available.
CWE
  • Unauthenticated read/unencrypted write
Assigner
References
https://access.redhat.com/errata/RHSA-2018:2185 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2018:2186 vendor-advisoryx_refsource_REDHAT
https://github.com/openssl/openssl/commit/898fb88… x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2018041… x_refsource_CONFIRM
https://security.FreeBSD.org/advisories/FreeBSD-S… vendor-advisoryx_refsource_FREEBSD
https://security.gentoo.org/glsa/201712-03 vendor-advisoryx_refsource_GENTOO
http://www.securitytracker.com/id/1039978 vdb-entryx_refsource_SECTRACK
https://www.openssl.org/news/secadv/20171207.txt x_refsource_CONFIRM
https://www.digitalmunition.me/2017/12/cve-2017-3… x_refsource_MISC
https://access.redhat.com/errata/RHSA-2018:0998 vendor-advisoryx_refsource_REDHAT
http://www.oracle.com/technetwork/security-adviso… x_refsource_CONFIRM
https://www.debian.org/security/2017/dsa-4065 vendor-advisoryx_refsource_DEBIAN
https://cert-portal.siemens.com/productcert/pdf/s… x_refsource_CONFIRM
http://www.securityfocus.com/bid/102103 vdb-entryx_refsource_BID
https://www.tenable.com/security/tns-2017-16 x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2018:2187 vendor-advisoryx_refsource_REDHAT
https://security.netapp.com/advisory/ntap-2018011… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2017120… x_refsource_CONFIRM
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
Impacted products
Vendor Product Version
OpenSSL Software Foundation OpenSSL Affected: 1.0.2b-1.0.2m
Create a notification for this product.
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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