CVE-2021-23841 (Medium) detected in OpenSSLOpenSSL_1_1_1g

[mend-bolt-for-github]

CVE-2021-23841 - Medium Severity Vulnerability

Vulnerable Library - OpenSSLOpenSSL_1_1_1g

TLS/SSL and crypto library

Library home page: https://github.com/OpenSSL/OpenSSL.git

Found in HEAD commit: ec9a3f8a365636d40076233e59d310f9ec5e9c96

Found in base branch: master

Vulnerable Source Files (6)

/deps/openssl/openssl/include/openssl/evperr.h
/deps/openssl/openssl/crypto/evp/evp_err.c
/deps/openssl/openssl/crypto/evp/evp_enc.c
/deps/openssl/openssl/crypto/evp/evp_err.c
/deps/openssl/openssl/include/openssl/evperr.h
/deps/openssl/openssl/crypto/evp/evp_enc.c

Vulnerability Details

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).

Publish Date: 2021-02-16

URL: CVE-2021-23841

CVSS 3 Score Details (5.9)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: None
  • Integrity Impact: None
  • Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23841

Release Date: 2021-02-16

Fix Resolution: OpenSSL_1_1_1j; openssl-src -111.14.0+1.1.1j

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[mend-bolt-for-github]

✔️ This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.

[mend-bolt-for-github]

ℹ️ This issue was automatically re-opened by Mend because the vulnerable library in the specific branch(es) has been detected in the Mend inventory.