Security
Security
When using a specific option, OpenSSL can be forced to fallback to the less secure SSL 2.0 protocol.
| Package | dev-libs/openssl on all architectures |
|---|---|
| Affected versions | < 0.9.7h |
| Unaffected versions | >= 0.9.7h revision >= 0.9.7g-r1 revision >= 0.9.7e-r2 |
OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library.
Applications setting the SSL_OP_MSIE_SSLV2_RSA_PADDING option (or the SSL_OP_ALL option, that implies it) can be forced by a third-party to fallback to the less secure SSL 2.0 protocol, even if both parties support the more secure SSL 3.0 or TLS 1.0 protocols.
A man-in-the-middle attacker can weaken the encryption used to communicate between two parties, potentially revealing sensitive information.
If possible, disable the use of SSL 2.0 in all OpenSSL-enabled applications.
All OpenSSL users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose dev-libs/openssl
Release date
October 12, 2005
Latest revision
November 07, 2005: 02
Severity
low
Exploitable
remote
Bugzilla entries