high
7.5
CWE
476 20
Advisory Published
Updated

CVE-2021-23841: Null Pointer Dereference

First published: Tue Feb 16 2021(Updated: )

WebRTC. A null pointer dereference was addressed with improved input validation.

Credit: Tavis Ormandy GoogleTavis Ormandy GoogleTavis Ormandy GoogleTavis Ormandy GoogleTavis Ormandy GoogleTavis Ormandy Google openssl-security@openssl.org

Affected SoftwareAffected VersionHow to fix
redhat/jbcs-httpd24-apr<0:1.6.3-107.el8
0:1.6.3-107.el8
redhat/jbcs-httpd24-apr-util<0:1.6.1-84.el8
0:1.6.1-84.el8
redhat/jbcs-httpd24-curl<0:7.78.0-2.el8
0:7.78.0-2.el8
redhat/jbcs-httpd24-httpd<0:2.4.37-78.el8
0:2.4.37-78.el8
redhat/jbcs-httpd24-nghttp2<0:1.39.2-39.el8
0:1.39.2-39.el8
redhat/jbcs-httpd24-openssl<1:1.1.1g-8.el8
1:1.1.1g-8.el8
redhat/jbcs-httpd24-openssl-chil<0:1.0.0-7.el8
0:1.0.0-7.el8
redhat/jbcs-httpd24-openssl-pkcs11<0:0.4.10-22.el8
0:0.4.10-22.el8
redhat/jbcs-httpd24-apr<0:1.6.3-107.jbcs.el7
0:1.6.3-107.jbcs.el7
redhat/jbcs-httpd24-apr-util<0:1.6.1-84.jbcs.el7
0:1.6.1-84.jbcs.el7
redhat/jbcs-httpd24-curl<0:7.78.0-2.jbcs.el7
0:7.78.0-2.jbcs.el7
redhat/jbcs-httpd24-httpd<0:2.4.37-78.jbcs.el7
0:2.4.37-78.jbcs.el7
redhat/jbcs-httpd24-nghttp2<0:1.39.2-39.jbcs.el7
0:1.39.2-39.jbcs.el7
redhat/jbcs-httpd24-openssl<1:1.1.1g-8.jbcs.el7
1:1.1.1g-8.jbcs.el7
redhat/jbcs-httpd24-openssl-chil<0:1.0.0-7.jbcs.el7
0:1.0.0-7.jbcs.el7
redhat/jbcs-httpd24-openssl-pkcs11<0:0.4.10-22.jbcs.el7
0:0.4.10-22.jbcs.el7
redhat/openssl<1:1.0.2k-22.el7_9
1:1.0.2k-22.el7_9
redhat/edk2<0:20210527gite1999b264f1f-3.el8
0:20210527gite1999b264f1f-3.el8
redhat/openssl<1:1.1.1k-4.el8
1:1.1.1k-4.el8
redhat/jws5-tomcat<0:9.0.50-3.redhat_00004.1.el7
0:9.0.50-3.redhat_00004.1.el7
redhat/jws5-tomcat-native<0:1.2.30-3.redhat_3.el7
0:1.2.30-3.redhat_3.el7
redhat/jws5-tomcat-vault<0:1.1.8-4.Final_redhat_00004.1.el7
0:1.1.8-4.Final_redhat_00004.1.el7
redhat/jws5-tomcat<0:9.0.50-3.redhat_00004.1.el8
0:9.0.50-3.redhat_00004.1.el8
redhat/jws5-tomcat-native<0:1.2.30-3.redhat_3.el8
0:1.2.30-3.redhat_3.el8
redhat/jws5-tomcat-vault<0:1.1.8-4.Final_redhat_00004.1.el8
0:1.1.8-4.Final_redhat_00004.1.el8
Apple Safari<14.1.1
14.1.1
debian/openssl
1.1.1n-0+deb10u3
1.1.1n-0+deb10u6
1.1.1w-0+deb11u1
1.1.1n-0+deb11u5
3.0.11-1~deb12u2
3.1.4-2
Apple macOS Big Sur<11.4
11.4
redhat/openssl<1.1.1
1.1.1
redhat/openssl<1.0.2
1.0.2
IBM Cognos Analytics<=12.0.0-12.0.1
IBM Cognos Analytics<=11.2.0-11.2.4 FP2
IBM Cognos Analytics<=11.1.1-11.1.7 FP7
Apple iOS<14.6
14.6
Apple iPadOS<14.6
14.6
OpenSSL OpenSSL>=1.0.2<1.0.2y
OpenSSL OpenSSL>=1.1.1<1.1.1j
Debian Debian Linux=10.0
Tenable Nessus Network Monitor=5.11.0
Tenable Nessus Network Monitor=5.11.1
Tenable Nessus Network Monitor=5.12.0
Tenable Nessus Network Monitor=5.12.1
Tenable Nessus Network Monitor=5.13.0
Tenable Tenable.sc>=5.13.0<=5.17.0
Apple Safari<14.1.1
Apple iPadOS<14.6
Apple iPhone OS<14.6
Apple macOS>=11.1<11.4
NetApp OnCommand Insight
NetApp OnCommand Workflow Automation
Netapp Snapcenter
Oracle Business Intelligence=5.5.0.0.0
Oracle Business Intelligence=5.9.0.0.0
Oracle Business Intelligence=12.2.1.3.0
Oracle Business Intelligence=12.2.1.4.0
Oracle Communications Cloud Native Core Policy=1.15.0
Oracle Enterprise Manager For Storage Management=13.4.0.0
Oracle Enterprise Manager Ops Center=12.4.0.0
Oracle Essbase=21.2
Oracle GraalVM=19.3.5
Oracle GraalVM=20.3.1.2
Oracle GraalVM=21.0.0.2
Oracle Jd Edwards World Security=a9.4
Oracle Mysql Enterprise Monitor<8.0.23
Oracle Mysql Server<5.7.33
Oracle Mysql Server>=8.0.15<8.0.23
Oracle PeopleSoft Enterprise PeopleTools=8.57
Oracle PeopleSoft Enterprise PeopleTools=8.58
Oracle PeopleSoft Enterprise PeopleTools=8.59
Oracle ZFS Storage Appliance Kit=8.8
Siemens Sinec Ins<1.0
Siemens Sinec Ins=1.0
Siemens Sinec Ins=1.0-sp1

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-637483.pdf

Remedy

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=122a19ab48091c657f7cb1fb3af9fc07bd557bbf

Remedy

https://www.oracle.com//security-alerts/cpujul2021.html

Remedy

https://www.oracle.com/security-alerts/cpuApr2021.html

Remedy

https://www.oracle.com/security-alerts/cpuapr2022.html

Remedy

https://www.oracle.com/security-alerts/cpuoct2021.html

Remedy

As per upstream "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."

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-23841?

    CVE-2021-23841 is a vulnerability that involves a null pointer dereference in the OpenSSL public API function X509_issuer_and_serial_hash().

  • What is the severity of CVE-2021-23841?

    The severity of CVE-2021-23841 is medium with a CVSS score of 5.9.

  • How does CVE-2021-23841 affect Safari?

    CVE-2021-23841 may affect Safari users, but it is recommended to refer to Apple's support page for specific information and remedies.

  • How do I fix CVE-2021-23841 on Red Hat products?

    To fix CVE-2021-23841 on Red Hat products, update the affected packages to the specified versions provided by Red Hat.

  • What are the references for CVE-2021-23841?

    The references for CVE-2021-23841 can be found at the following URLs: 1. [Apple Support - HT212529](https://support.apple.com/en-us/HT212529) 2. [Apple Support - HT212534](https://support.apple.com/en-us/HT212534) 3. [Apple Support - HT212528](https://support.apple.com/en-us/HT212528)

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