GEN:SID | 1:2656 |
Message | WEB-MISC SSLv2 Client_Hello Challenge Length overflow attempt |
Summary | This event is generated when an attempt is made to exploit a vulnerability associated with Netscape Network Security Services (NSS) message parsing.
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Impact | A successful attack can cause a heap overflow and the subsequent execution of arbitrary code on a vulnerable server.
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Detailed Information | A vulnerability exists in the way NSS parses a client connect SSLv2 message that can cause a heap overflow and the subsequent execution of arbitrary code on a vulnerable server. This can occur when an overly long challenge length and accompanying data are supplied in a Client Hello message.
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Affected Systems | Netscape Enterprise Webserver all versions Netscape Personalization Engine all versions Nescape Directory Server all versions Netscape Certificate Management Server all versions Sun One/iPlanet all versions
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Attack Scenarios | An attacker can send a Client Hello message with an overly long challenge length and data, causing a heap overflow on a vulnerable server.
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Ease of Attack | Difficult.
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Corrective Action | Upgrade to the latest non-affected version of the software.
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Additional References | |