SSL: OpenSSL dtls1_reassemble_fragment Invalid Fragment Buffer Overflow

This signature detects attempts to exploit a known flaw in OpenSSL. The vulnerability is due to an inconsistency error in the OpenSSL method used for processing DTLS fragments. A remote unauthenticated attacker could exploit this vulnerability by sending a malicious DTLS fragmented message to a target. Successful exploitation could lead to arbitrary code execution in the security context of the affected user.

Extended Description

The dtls1_reassemble_fragment function in d1_both.c in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h does not properly validate fragment lengths in DTLS ClientHello messages, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) via a long non-initial fragment.

Affected Products

Openssl openssl

References

BugTraq: 67900

CVE: CVE-2014-0195

Short Name

SSL:OPENSSL-DTLS1-BOF

Severity

Major

Recommended

False

Recommended Action

Drop

SSL: OpenSSL dtls1_reassemble_fragment Invalid Fragment Buffer Overflow

Extended Description

Affected Products

References

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