REDHAT-BUG-1072191
First published: Tue Mar 04 2014(Updated: )
A flaw was found in libssh server. When accepting a new connection, the server forks and the child process handles the request. The RAND_bytes() function of openssl doesn't reset its state after the fork, but simply adds the current process id (getpid) to the PRNG state, which is not guaranteed to be unique. The most important consequence is that servers using EC (ECDSA) or DSA certificates may under certain conditions leak their private key.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| libssh | ||
| OpenSSL |
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Reference Links
- http://git.libssh.org/projects/libssh.git/commit/?id=e99246246b4061f7e71463f8806b9dcad65affa0
- http://www.libssh.org/2014/03/04/libssh-0-6-3-security-release/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1072739
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1072740
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1072741
- https://bugzilla.redhat.com/show_bug.cgi?id=1072191
Frequently Asked Questions
What is the severity of REDHAT-BUG-1072191?
The severity of REDHAT-BUG-1072191 is considered critical due to potential implications on the randomness in security processes.
How do I fix REDHAT-BUG-1072191?
To fix REDHAT-BUG-1072191, you should update to the latest version of libssh and OpenSSL that address this vulnerability.
What systems are affected by REDHAT-BUG-1072191?
Systems running vulnerable versions of libssh and OpenSSL are affected by REDHAT-BUG-1072191.
What kind of attacks could exploit REDHAT-BUG-1072191?
REDHAT-BUG-1072191 could potentially be exploited for cryptographic attacks, affecting confidentiality and data integrity.
Is there a workaround for REDHAT-BUG-1072191?
Currently, the best approach is to apply the available patches rather than looking for workarounds for REDHAT-BUG-1072191.
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