CVE-2021-3449 (GCVE-0-2021-3449)
Vulnerability from cvelistv5
Published
2021-03-25 14:25
Modified
2024-09-17 03:43
Severity ?
CWE
  • NULL pointer dereference
Summary
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).
References
https://www.openssl.org/news/secadv/20210325.txt
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd vendor-advisory
https://www.debian.org/security/2021/dsa-4875 vendor-advisory
http://www.openwall.com/lists/oss-security/2021/03/27/1 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/27/2 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/28/3 mailing-list
http://www.openwall.com/lists/oss-security/2021/03/28/4 mailing-list
https://security.gentoo.org/glsa/202103-03 vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/ vendor-advisory
https://www.oracle.com/security-alerts/cpuApr2021.html
https://www.tenable.com/security/tns-2021-10
https://www.tenable.com/security/tns-2021-09
https://security.netapp.com/advisory/ntap-20210513-0002/
https://security.netapp.com/advisory/ntap-20210326-0006/
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc
https://www.tenable.com/security/tns-2021-06
https://www.tenable.com/security/tns-2021-05
https://kc.mcafee.com/corporate/index?page=content&id=SB10356
https://www.oracle.com//security-alerts/cpujul2021.html
https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013
https://lists.debian.org/debian-lts-announce/2021/08/msg00029.html mailing-list
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpuapr2022.html
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://www.oracle.com/security-alerts/cpujul2022.html
https://security.netapp.com/advisory/ntap-20240621-0006/
Impacted products
Vendor Product Version
OpenSSL OpenSSL Version: Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j)
Create a notification for this product.
Show details on NVD website


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    "cveId": "CVE-2021-3449",
    "datePublished": "2021-03-25T14:25:13.659Z",
    "dateReserved": "2021-03-17T00:00:00.000Z",
    "dateUpdated": "2024-09-17T03:43:55.497Z",
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}


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