onyx --cves cve-2021-3449
CVE-2021-3449
- score
- <0.1
- cvss
- 5.9
- epss
- 63.5%
- published
- 2021-03-25
- kev added
- —
- first seen
OpenSSL 1.1.1-1.1.1j contains a denial of service caused by a NULL pointer dereference triggered by a maliciously crafted renegotiation ClientHello message with missing signature_algorithms extension but including signature_algorithms_cert extension, letting attackers cause server crashes, exploit requires sending specific malformed TLSv1.2 renegotiation messages.
Timeline
How this CVE moved toward exploitation. Chart: last 30 days — trend score, EPSS, community mentions per day; hover the event lane.
- Published
- Tracked by Onyx
- Public PoC
Exploit availability
Public PoC flagged by vulnx; no direct exploit link among the citations.
Weaknesses
References 28
- https://www.oracle.com/security-alerts/cpuoct2021.html
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/
- https://www.openssl.org/news/secadv/20210325.txt
- http://www.openwall.com/lists/oss-security/2021/03/27/2
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845
- https://kc.mcafee.com/corporate/index?page=content&id=SB10356
- https://security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc
- https://security.netapp.com/advisory/ntap-20210513-0002/
- https://www.debian.org/security/2021/dsa-4875
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf
- https://security.netapp.com/advisory/ntap-20210326-0006/
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.tenable.com/security/tns-2021-06
- https://www.tenable.com/security/tns-2021-09
- https://security.netapp.com/advisory/ntap-20240621-0006/
- http://www.openwall.com/lists/oss-security/2021/03/27/1
- http://www.openwall.com/lists/oss-security/2021/03/28/3
- https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
- https://lists.debian.org/debian-lts-announce/2021/08/msg00029.html
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013
- https://www.tenable.com/security/tns-2021-05
- http://www.openwall.com/lists/oss-security/2021/03/28/4