CVE - CVE-2021-23841

CVE-ID
CVE-2021-23841	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed). This may subsequently result in a NULL pointer deref and a crash leading to a potential denial of service attack. The function X509_issuer_and_serial_hash() is never directly called by OpenSSL itself so applications are only vulnerable if they use this function directly and they use it on certificates that may have been obtained from untrusted sources. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf CONFIRM:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=122a19ab48091c657f7cb1fb3af9fc07bd557bbf URL:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=122a19ab48091c657f7cb1fb3af9fc07bd557bbf CONFIRM:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807 URL:https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807 CONFIRM:https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 URL:https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846 CONFIRM:https://security.netapp.com/advisory/ntap-20210219-0009/ URL:https://security.netapp.com/advisory/ntap-20210219-0009/ CONFIRM:https://security.netapp.com/advisory/ntap-20210513-0002/ URL:https://security.netapp.com/advisory/ntap-20210513-0002/ CONFIRM:https://support.apple.com/kb/HT212528 URL:https://support.apple.com/kb/HT212528 CONFIRM:https://support.apple.com/kb/HT212529 URL:https://support.apple.com/kb/HT212529 CONFIRM:https://support.apple.com/kb/HT212534 URL:https://support.apple.com/kb/HT212534 CONFIRM:https://www.openssl.org/news/secadv/20210216.txt URL:https://www.openssl.org/news/secadv/20210216.txt CONFIRM:https://www.tenable.com/security/tns-2021-03 URL:https://www.tenable.com/security/tns-2021-03 CONFIRM:https://www.tenable.com/security/tns-2021-09 URL:https://www.tenable.com/security/tns-2021-09 DEBIAN:DSA-4855 URL:https://www.debian.org/security/2021/dsa-4855 FULLDISC:20210526 APPLE-SA-2021-05-25-1 iOS 14.6 and iPadOS 14.6 URL:http://seclists.org/fulldisclosure/2021/May/67 FULLDISC:20210526 APPLE-SA-2021-05-25-2 macOS Big Sur 11.4 URL:http://seclists.org/fulldisclosure/2021/May/70 FULLDISC:20210526 APPLE-SA-2021-05-25-5 Safari 14.1.1 URL:http://seclists.org/fulldisclosure/2021/May/68 GENTOO:GLSA-202103-03 URL:https://security.gentoo.org/glsa/202103-03 MISC:https://www.oracle.com//security-alerts/cpujul2021.html URL:https://www.oracle.com//security-alerts/cpujul2021.html MISC:https://www.oracle.com/security-alerts/cpuApr2021.html URL:https://www.oracle.com/security-alerts/cpuApr2021.html MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MISC:https://www.oracle.com/security-alerts/cpuoct2021.html URL:https://www.oracle.com/security-alerts/cpuoct2021.html
Assigning CNA
OpenSSL Software Foundation
Date Record Created
20210112	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20210112)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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