<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200902-02"> <title>OpenSSL: Certificate validation error</title> <synopsis> An error in the OpenSSL certificate chain validation might allow for spoofing attacks. </synopsis> <product type="ebuild">openssl</product> <announced>2009-02-12</announced> <revised count="01">2009-02-12</revised> <bug>251346</bug> <access>remote</access> <affected> <package name="dev-libs/openssl" auto="yes" arch="*"> <unaffected range="ge">0.9.8j</unaffected> <vulnerable range="lt">0.9.8j</vulnerable> </package> </affected> <background> <p> OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general purpose cryptography library. </p> </background> <description> <p> The Google Security Team reported that several functions incorrectly check the result after calling the EVP_VerifyFinal() function, allowing a malformed signature to be treated as a good signature rather than as an error. This issue affects the signature checks on DSA and ECDSA keys used with SSL/TLS. </p> </description> <impact type="normal"> <p> A remote attacker could exploit this vulnerability and spoof arbitrary names to conduct Man-In-The-Middle attacks and intercept sensitive information. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All OpenSSL users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.8j"</code> </resolution> <references> <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077">CVE-2008-5077</uri> </references> <metadata tag="requester" timestamp="2009-01-13T17:07:15Z"> rbu </metadata> <metadata tag="bugReady" timestamp="2009-01-13T17:07:33Z"> rbu </metadata> <metadata tag="submitter" timestamp="2009-01-13T17:14:56Z"> rbu </metadata> </glsa>