Home CVE Database CVE-2021-23841

CVE-2021-23841

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).

Priority: MEDIUM
CVSS v3: 7.5
Publish Date: Feb 16, 2021
Related ID: --
CVSS v2: HIGH
Modified Date: Feb 19, 2021

Find out more about CVE-2021-23841 from the MITRE-CVE dictionary and NIST NVD


Products Affected

Login may be required to access defects or downloads.

Product Name Status Defect Fixed Downloads
Linux
Wind River Linux LTS 17 Fixed LIN10-8265
10.17.41.24 --
Wind River Linux 8 Legacy -- -- --
Wind River Linux 9 Legacy -- -- --
Wind River Linux 7 Legacy -- -- --
Wind River Linux LTS 21 Fixed -- 10.19.45.17 --
Wind River Linux LTS 18 Fixed LIN1018-7277
10.18.44.22 --
Wind River Linux LTS 19 Fixed LIN1019-6080
10.19.45.17 --
Wind River Linux CD release Not Vulnerable -- -- --
VxWorks
VxWorks 7 Fixed -- 21.03 --
VxWorks 6.9 Fixed -- 6.9.4.12 RCPL3 --

Related Products

Product Name Status Defect Fixed Downloads

Comments

openssl

Live chat
Online