CVE-2021-23841

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

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

https://www.openssl.org/news/secadv/20210216.txt

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=8252ee4d90f3f2004d3d0aeeed003ad49c9a7807

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

https://www.debian.org/security/2021/dsa-4855

https://security.netapp.com/advisory/ntap-20210219-0009/

https://www.tenable.com/security/tns-2021-03

https://security.gentoo.org/glsa/202103-03

https://www.tenable.com/security/tns-2021-09

https://security.netapp.com/advisory/ntap-20210513-0002/

https://support.apple.com/kb/HT212529

https://support.apple.com/kb/HT212528

https://support.apple.com/kb/HT212534

http://seclists.org/fulldisclosure/2021/May/68

http://seclists.org/fulldisclosure/2021/May/67

http://seclists.org/fulldisclosure/2021/May/70

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

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44846

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

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

Details

Source: MITRE

Published: 2021-02-16

Updated: 2021-10-20

Type: CWE-190

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 5.9

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 2.2

Severity: MEDIUM

Tenable Plugins

View all (65 total)

IDNameProductFamilySeverity
155673Oracle Linux 8 : openssl (ELSA-2021-9561)NessusOracle Linux Local Security Checks
high
155545CentOS 7 : openssl (CESA-2021:3798)NessusCentOS Local Security Checks
high
155531EulerOS Virtualization 2.9.1 : shim (EulerOS-SA-2021-2758)NessusHuawei Local Security Checks
high
155496EulerOS Virtualization 2.9.0 : shim (EulerOS-SA-2021-2785)NessusHuawei Local Security Checks
high
155223RHEL 7 : Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP10 (RHSA-2021:4614)NessusRed Hat Local Security Checks
critical
155214RHEL 8 : openssl (RHSA-2021:4424)NessusRed Hat Local Security Checks
high
155189CentOS 8 : edk2 (CESA-2021:4198)NessusCentOS Local Security Checks
high
155124CentOS 8 : openssl (CESA-2021:4424)NessusCentOS Local Security Checks
high
155073RHEL 8 : edk2 (RHSA-2021:4198)NessusRed Hat Local Security Checks
high
154916Oracle Linux 7 : openssl (ELSA-2021-9478)NessusOracle Linux Local Security Checks
high
154746Oracle Linux 7 : openssl (ELSA-2021-9528)NessusOracle Linux Local Security Checks
high
154066Oracle Linux 7 : openssl (ELSA-2021-3798)NessusOracle Linux Local Security Checks
high
153738EulerOS 2.0 SP9 : shim (EulerOS-SA-2021-2542)NessusHuawei Local Security Checks
medium
153705EulerOS 2.0 SP9 : shim (EulerOS-SA-2021-2566)NessusHuawei Local Security Checks
medium
153648EulerOS 2.0 SP8 : compat-openssl10 (EulerOS-SA-2021-2456)NessusHuawei Local Security Checks
high
153326EulerOS 2.0 SP2 : openssl098e (EulerOS-SA-2021-2417)NessusHuawei Local Security Checks
high
153288EulerOS 2.0 SP2 : openssl (EulerOS-SA-2021-2416)NessusHuawei Local Security Checks
high
153266EulerOS 2.0 SP2 : openssl110f (EulerOS-SA-2021-2418)NessusHuawei Local Security Checks
high
151922Oracle Solaris Critical Patch Update : jul2021_SRU11_3_36_26_0NessusSolaris Local Security Checks
medium
151385EulerOS Virtualization 3.0.2.2 : openssl (EulerOS-SA-2021-2154)NessusHuawei Local Security Checks
high
151312EulerOS Virtualization for ARM 64 3.0.2.0 : openssl (EulerOS-SA-2021-2091)NessusHuawei Local Security Checks
high
151263EulerOS Virtualization 3.0.6.6 : openssl098e (EulerOS-SA-2021-2044)NessusHuawei Local Security Checks
high
151258EulerOS Virtualization 3.0.6.6 : openssl (EulerOS-SA-2021-2032)NessusHuawei Local Security Checks
high
151175EulerOS Virtualization for ARM 64 3.0.6.0 : openssl (EulerOS-SA-2021-2005)NessusHuawei Local Security Checks
high
150559SUSE SLES11 Security Update : openssl1 (SUSE-SU-2021:14667-1)NessusSuSE Local Security Checks
high
150509SUSE SLES11 Security Update : openssl (SUSE-SU-2021:14670-1)NessusSuSE Local Security Checks
high
150188EulerOS 2.0 SP9 : openssl (EulerOS-SA-2021-1956)NessusHuawei Local Security Checks
high
150175EulerOS 2.0 SP9 : openssl (EulerOS-SA-2021-1935)NessusHuawei Local Security Checks
high
149987Apple iOS < 14.6 Multiple Vulnerabilities (HT212528)NessusMobile Devices
high
149986macOS 11.x < 11.4 (HT212529)NessusMacOS X Local Security Checks
high
149606EulerOS 2.0 SP5 : openssl (EulerOS-SA-2021-1907)NessusHuawei Local Security Checks
high
149581EulerOS 2.0 SP5 : openssl111d (EulerOS-SA-2021-1909)NessusHuawei Local Security Checks
high
149574EulerOS 2.0 SP5 : openssl098e (EulerOS-SA-2021-1908)NessusHuawei Local Security Checks
high
149551EulerOS 2.0 SP8 : openssl (EulerOS-SA-2021-1882)NessusHuawei Local Security Checks
high
149403Nessus Network Monitor < 5.13.1 Multiple Vulnerabilities (TNS-2021-09)NessusMisc.
high
149201EulerOS 2.0 SP3 : openssl (EulerOS-SA-2021-1825)NessusHuawei Local Security Checks
medium
149168EulerOS 2.0 SP3 : openssl098e (EulerOS-SA-2021-1826)NessusHuawei Local Security Checks
high
148986Oracle MySQL Enterprise Monitor Multiple Vulnerabilities (Apr 2021 CPU)NessusCGI abuses
critical
148937MySQL 8.0.x < 8.0.24 Multiple Vulnerabilities (Apr 2021 CPU)NessusDatabases
medium
148936MySQL 5.7.x < 5.7.34 Multiple Vulnerabilities (Apr 2021 CPU)NessusDatabases
medium
148869FreeBSD : MySQL -- Multiple vulnerabilities (56ba4513-a1be-11eb-9072-d4c9ef517024)NessusFreeBSD Local Security Checks
high
148638EulerOS Virtualization 2.9.1 : openssl (EulerOS-SA-2021-1721)NessusHuawei Local Security Checks
high
148635EulerOS Virtualization 2.9.0 : openssl (EulerOS-SA-2021-1740)NessusHuawei Local Security Checks
high
148402OpenSSL 1.1.1 < 1.1.1j Multiple VulnerabilitiesNessusWeb Servers
high
148355Photon OS 4.0: Openssl PHSA-2021-4.0-0007NessusPhotonOS Local Security Checks
high
148271GLSA-202103-03 : OpenSSL: Multiple vulnerabilitiesNessusGentoo Local Security Checks
high
148145SUSE SLES12 Security Update : openssl (SUSE-SU-2021:0939-1)NessusSuSE Local Security Checks
high
148011Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 20.10 : OpenSSL vulnerabilities (USN-4738-1)NessusUbuntu Local Security Checks
high
147910Amazon Linux 2 : openssl11 (ALAS-2021-1612)NessusAmazon Linux Local Security Checks
high
147895Tenable Nessus Agent < 8.2.3 Multiple Vulnerabilities (TNS-2021-04)NessusMisc.
medium
147860openSUSE Security Update : openssl-1_1 (openSUSE-2021-427)NessusSuSE Local Security Checks
high
147852openSUSE Security Update : openssl-1_0_0 (openSUSE-2021-430)NessusSuSE Local Security Checks
high
147843SUSE SLES12 Security Update : compat-openssl098 (SUSE-SU-2021:0793-1)NessusSuSE Local Security Checks
high
147736SUSE SLES15 Security Update : openssl-1_0_0 (SUSE-SU-2021:0769-1)NessusSuSE Local Security Checks
high
147571SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0753-1)NessusSuSE Local Security Checks
high
147529SUSE SLES12 Security Update : openssl-1_1 (SUSE-SU-2021:0752-1)NessusSuSE Local Security Checks
high
147511SUSE SLES12 Security Update : openssl-1_0_0 (SUSE-SU-2021:0725-1)NessusSuSE Local Security Checks
high
147502SUSE SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0755-1)NessusSuSE Local Security Checks
high
147447SUSE SLED15 / SLES15 Security Update : openssl-1_1 (SUSE-SU-2021:0754-1)NessusSuSE Local Security Checks
high
147144Tenable SecurityCenter 5.16.x / 5.17.0 Multiple Vulnerabilities (TNS-2021-03)NessusMisc.
high
146818Amazon Linux AMI : openssl (ALAS-2021-1482)NessusAmazon Linux Local Security Checks
high
146628Amazon Linux 2 : openssl (ALAS-2021-1608)NessusAmazon Linux Local Security Checks
low
146599Debian DSA-4855-1 : openssl - security updateNessusDebian Local Security Checks
medium
146591OpenSSL 1.0.2 < 1.0.2y Multiple VulnerabilitiesNessusWeb Servers
low
146560FreeBSD : OpenSSL -- Multiple vulnerabilities (96a21236-707b-11eb-96d8-d4c9ef517024)NessusFreeBSD Local Security Checks
low