CVE-2021-3449
⚪ Do wiadomości
Błąd w OpenSSL powoduje awarię serwera TLS przy złośliwym żądaniu renegocjacji.
CVSS
5.9
EPSS
63.5%
Exploit
none
Vendor
siemens
Opis źródłowy (NVD)
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).
dos
Brak patcha
Źródła i daty
| Źródło | Wartość |
|---|---|
| NVD – CVSS | 5.9 |
| CISA KEV (aktywnie wykorzystywane) | Nie |
| FIRST EPSS (prawdopodobieństwo exploita) | 63.5% |
| Opublikowano (NVD) | 2021-03-25 15:15:13 UTC |
| Ostatnia modyfikacja (NVD) | 2026-10-08 22:17:11 UTC |
Referencje
- http://www.openwall.com/lists/oss-security/2021/03/27/1 ([email protected]) [Mailing List, Third Party Advisory]
- http://www.openwall.com/lists/oss-security/2021/03/27/2 ([email protected]) [Mailing List, Third Party Advisory]
- http://www.openwall.com/lists/oss-security/2021/03/28/3 ([email protected]) [Mailing List, Third Party Advisory]
- http://www.openwall.com/lists/oss-security/2021/03/28/4 ([email protected]) [Mailing List, Third Party Advisory]
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf ([email protected]) [Third Party Advisory]
- https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf ([email protected]) [Patch, Third Party Advisory]
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148 ([email protected])
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845 ([email protected]) [Third Party Advisory]
- https://kc.mcafee.com/corporate/index?page=content&id=SB10356 ([email protected]) [Third Party Advisory]
- https://lists.debian.org/debian-lts-announce/2021/08/msg00029.html ([email protected]) [Mailing List, Third Party Advisory]
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/ ([email protected])
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013 ([email protected]) [Third Party Advisory]
- https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc ([email protected]) [Third Party Advisory]
- https://security.gentoo.org/glsa/202103-03 ([email protected]) [Third Party Advisory]
- https://security.netapp.com/advisory/ntap-20210326-0006/ ([email protected]) [Third Party Advisory]
- https://security.netapp.com/advisory/ntap-20210513-0002/ ([email protected]) [Third Party Advisory]
- https://security.netapp.com/advisory/ntap-20240621-0006/ ([email protected])
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd ([email protected]) [Third Party Advisory]
- https://www.debian.org/security/2021/dsa-4875 ([email protected]) [Third Party Advisory]
- https://www.openssl.org/news/secadv/20210325.txt ([email protected]) [Vendor Advisory]
- https://www.oracle.com//security-alerts/cpujul2021.html ([email protected]) [Patch, Third Party Advisory]
- https://www.oracle.com/security-alerts/cpuApr2021.html ([email protected]) [Patch, Third Party Advisory]
- https://www.oracle.com/security-alerts/cpuapr2022.html ([email protected]) [Patch, Third Party Advisory]
- https://www.oracle.com/security-alerts/cpujul2022.html ([email protected]) [Third Party Advisory]
- https://www.oracle.com/security-alerts/cpuoct2021.html ([email protected]) [Third Party Advisory]
- https://www.tenable.com/security/tns-2021-05 ([email protected]) [Third Party Advisory]
- https://www.tenable.com/security/tns-2021-06 ([email protected]) [Third Party Advisory]
- https://www.tenable.com/security/tns-2021-09 ([email protected]) [Third Party Advisory]
- https://www.tenable.com/security/tns-2021-10 ([email protected]) [Third Party Advisory]