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Alerts This Week
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Gentoo: GLSA-201408-14 Normal: Stunnel Information Disclosure

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Calendar Grey August 29, 2014
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A vulnerability in stunnel might allow remote attackers to gain access to private key information.

Summary

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.

Topics%20covered

Topics Covered

security advisory gentoo remote access stunnel information disclosure normal severity key information

Resolution

All stunnel users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/stunnel-5.02"

References

[ 1 ] CVE-2014-0016 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0016

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/201408-14
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Concerns

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.

Severity: Normal
Title: stunnel: Information disclosure
Date: August 29, 2014
Bugs: #503506
ID: 201408-14

Topics%20covered

Topics Covered

security advisory gentoo remote access stunnel information disclosure normal severity key information

Synopsis

A vulnerability in stunnel might allow remote attackers to gain access to private key information.

Background

The stunnel program is designed to work as an SSL encryption wrapper between a client and a local or remote server.

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/stunnel < 5.02 >= 5.02

Impact

===== A remote attacker may gain access to private key information from ECDSA or DSA keys.

Workaround

There is no known workaround at this time.