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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-3449 Detail

Description

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).


Metrics

 
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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2021/03/27/1 Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2021/03/27/2 Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2021/03/28/3 Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2021/03/28/4 Mailing List  Third Party Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf Third Party Advisory 
https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf Patch  Third Party Advisory 
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148
https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845 Third Party Advisory 
https://kc.mcafee.com/corporate/index?page=content&id=SB10356 Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/08/msg00029.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013 Third Party Advisory 
https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc Third Party Advisory 
https://security.gentoo.org/glsa/202103-03 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210326-0006/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210513-0002/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20240621-0006/
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd Third Party Advisory 
https://www.debian.org/security/2021/dsa-4875 Third Party Advisory 
https://www.openssl.org/news/secadv/20210325.txt Vendor Advisory 
https://www.oracle.com//security-alerts/cpujul2021.html Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpuApr2021.html Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpuapr2022.html Patch  Third Party Advisory 
https://www.oracle.com/security-alerts/cpujul2022.html Third Party Advisory 
https://www.oracle.com/security-alerts/cpuoct2021.html Third Party Advisory 
https://www.tenable.com/security/tns-2021-05 Third Party Advisory 
https://www.tenable.com/security/tns-2021-06 Third Party Advisory 
https://www.tenable.com/security/tns-2021-09 Third Party Advisory 
https://www.tenable.com/security/tns-2021-10 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

36 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-3449
NVD Published Date:
03/25/2021
NVD Last Modified:
06/21/2024
Source:
OpenSSL Software Foundation