Out-of-bounds Read Affecting openssl package, versions <1.0.2g-1ubuntu4.10
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Test your applications- Snyk ID SNYK-UBUNTU1604-OPENSSL-374519
- published 7 Dec 2017
- disclosed 7 Dec 2017
How to fix?
Upgrade Ubuntu:16.04
openssl
to version 1.0.2g-1ubuntu4.10 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl
package and not the openssl
package as distributed by Ubuntu
.
See How to fix?
for Ubuntu:16.04
relevant fixed versions and status.
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.
References
- ADVISORY
- CONFIRM
- CONFIRM
- CVE Details
- Debian Security Advisory
- Debian Security Tracker
- FREEBSD
- Gentoo Security Advisory
- GitHub Commit
- MISC
- Netapp Security Advisory
- Netapp Security Advisory
- Netapp Security Advisory
- OpenSSL Security Advisory
- Oracle Security Advisory
- Oracle Security Advisory
- Oracle Security Advisory
- Oracle Security Advisory
- RHSA Security Advisory
- RHSA Security Advisory
- RHSA Security Advisory
- RHSA Security Advisory
- Security Focus
- Security Tracker