11/12/2023 0 Comments Openssl buffer overflow![]() Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions. ![]() Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. The links above are to a tar file containing this signed advisory, fix packages, and OpenSSL signatures for each package. We are making clients aware of relevant vulnerabilities as we become aware of them. A vulnerability in X11 on AIX could allow a non-privileged local user to cause a buffer overflow that could result in a denial of service or arbitrary code execution (CVE-2022-47990). Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Computer programs frequently operate on chunks of data that are read from a file, from the. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. At its core, the buffer overflow is an astonishingly simple bug that results from a common practice. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. A buffer overflow can be triggered by sending an X.509 certificate with a specially crafted email address in the id-on-SmtpUTF8Mailbox field (OID 1.3.6.1.5.5. Exploitation is performed by corrupting stored data in ways that cause the application to overwrite internal structures. Heap overflow attack: A heap-based buffer overflow is where the buffer, to be overwritten, is allocated a large portion of additional memory. By using a specially-crafted email address in a certificate, a remote attacker could exploit this vulnerability to cause a TLS client to crash, and results in a denial of service condition.ĬVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)Īccording to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. This is the most common type of buffer overflow attack. By using a specially-crafted email address, a remote attacker could overflow a buffer and execute arbitrary code or cause the application to crash.ĬVSS Temporal Score: See: for the current score.ĬVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)ĭESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a stack based buffer overflow during X.509 certificate verification. DESCRIPTION: OpenSSL is vulnerable to a stack-based buffer overflow, caused by improper bounds checking during X.509 certificate verification.
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