Joined: 12 May 2004
|Posted: Fri Aug 29, 2014 8:26 pm Post subject: [ GLSA 201408-14 ] stunnel: Information disclosure
|Gentoo Linux Security Advisory
Title: stunnel: Information disclosure (GLSA 201408-14)
Date: August 29, 2014
A vulnerability in stunnel might allow remote attackers to gain
access to private key information.
The stunnel program is designed to work as an SSL encryption wrapper
between a client and a local or remote server.
Vulnerable: < 5.02
Unaffected: >= 5.02
Architectures: All supported architectures
stunnel does not properly update the state of the pseudo-random
generator after fork-threading which causes subsequent children with the
same process ID to use the same entropy pool. ECDSA and DSA keys, when
not used in deterministic mode (RFC6979), rely on random data for its k
parameter to not leak private key information.
A remote attacker may gain access to private key information from ECDSA
or DSA keys.
There is no known workaround at this time.
All stunnel users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/stunnel-5.02"