GoogleOSV:BIT-NODE-2021-3449BIT-node-2021-3449
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
6.7 Medium
AI Score
Confidence
Low
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.004 Low
EPSS
Percentile
71.6%
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
www.openwall.com/lists/oss-security/2021/03/27/1
www.openwall.com/lists/oss-security/2021/03/27/2
www.openwall.com/lists/oss-security/2021/03/28/3
www.openwall.com/lists/oss-security/2021/03/28/4
cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
cert-portal.siemens.com/productcert/pdf/ssa-772220.pdf
git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=fb9fa6b51defd48157eeb207f52181f735d96148
kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44845
kc.mcafee.com/corporate/index?page=content&id=SB10356
lists.debian.org/debian-lts-announce/2021/08/msg00029.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CCBFLLVQVILIVGZMBJL3IXZGKWQISYNP/
psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0013
security.FreeBSD.org/advisories/FreeBSD-SA-21:07.openssl.asc
security.gentoo.org/glsa/202103-03
security.netapp.com/advisory/ntap-20210326-0006/
security.netapp.com/advisory/ntap-20210513-0002/
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-openssl-2021-GHY28dJd
www.debian.org/security/2021/dsa-4875
www.openssl.org/news/secadv/20210325.txt
www.oracle.com//security-alerts/cpujul2021.html
www.oracle.com/security-alerts/cpuApr2021.html
www.oracle.com/security-alerts/cpuapr2022.html
www.oracle.com/security-alerts/cpujul2022.html
www.oracle.com/security-alerts/cpuoct2021.html
www.tenable.com/security/tns-2021-05
www.tenable.com/security/tns-2021-06
www.tenable.com/security/tns-2021-09
www.tenable.com/security/tns-2021-10
Related
5.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
6.7 Medium
AI Score
Confidence
Low
4.3 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:N/I:N/A:P
0.004 Low
EPSS
Percentile
71.6%