Executive Summary
| Informations | |||
|---|---|---|---|
| Name | CVE-2021-3449 | First vendor Publication | 2021-03-25 |
| Vendor | Cve | Last vendor Modification | 2022-08-29 |
Security-Database Scoring CVSS v3
| Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H | |||
|---|---|---|---|
| Overall CVSS Score | 5.9 | ||
| Base Score | 5.9 | Environmental Score | 5.9 |
| impact SubScore | 3.6 | Temporal Score | 5.9 |
| Exploitabality Sub Score | 2.2 | ||
| Attack Vector | Network | Attack Complexity | High |
| Privileges Required | None | User Interaction | None |
| Scope | Unchanged | Confidentiality Impact | None |
| Integrity Impact | None | Availability Impact | High |
| Calculate full CVSS 3.0 Vectors scores | |||
Security-Database Scoring CVSS v2
| Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:P) | |||
|---|---|---|---|
| Cvss Base Score | 4.3 | Attack Range | Network |
| Cvss Impact Score | 2.9 | Attack Complexity | Medium |
| Cvss Expoit Score | 8.6 | Authentication | None Required |
| Calculate full CVSS 2.0 Vectors scores | |||
Detail
| An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j). |
Original Source
| Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3449 |
CWE : Common Weakness Enumeration
| % | Id | Name |
|---|---|---|
| 100 % | CWE-476 | NULL Pointer Dereference |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
| Date | Informations |
|---|---|
| 2023-03-29 02:18:02 |
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| 2023-03-28 12:23:18 |
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| 2023-02-08 02:07:03 |
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| 2022-10-11 13:07:43 |
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| 2022-10-11 01:22:46 |
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| 2022-10-07 02:08:15 |
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| 2022-08-30 02:11:14 |
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| 2022-08-30 00:27:29 |
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| 2022-07-26 00:29:50 |
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| 2022-04-20 09:23:21 |
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| 2022-04-07 21:23:15 |
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| 2022-04-06 21:23:14 |
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| 2022-03-10 21:23:24 |
|
| 2022-02-21 01:54:45 |
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| 2022-02-08 12:54:08 |
|
| 2022-02-03 12:54:00 |
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| 2021-10-20 17:23:15 |
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| 2021-09-22 00:23:16 |
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| 2021-08-31 21:23:25 |
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| 2021-08-05 01:43:12 |
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| 2021-07-21 05:23:00 |
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| 2021-07-16 05:23:01 |
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| 2021-07-14 09:23:10 |
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| 2021-07-14 00:23:00 |
|
| 2021-07-13 17:23:02 |
|
| 2021-06-18 00:22:56 |
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| 2021-06-17 21:23:31 |
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| 2021-06-15 00:23:03 |
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| 2021-06-03 00:23:01 |
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| 2021-05-14 00:23:03 |
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| 2021-05-12 05:22:56 |
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| 2021-05-04 14:09:53 |
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| 2021-04-22 00:23:33 |
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| 2021-04-15 13:23:16 |
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| 2021-04-02 09:23:02 |
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| 2021-04-02 05:23:07 |
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| 2021-04-02 00:23:02 |
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| 2021-03-31 21:23:24 |
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| 2021-03-29 09:23:00 |
|
| 2021-03-28 13:23:01 |
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| 2021-03-28 00:22:59 |
|
| 2021-03-27 12:36:13 |
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| 2021-03-27 09:23:00 |
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| 2021-03-27 05:23:02 |
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| 2021-03-26 17:22:59 |
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| 2021-03-26 12:38:49 |
|
