OUTSOURCED CYBERSECURITY SUPPORT AND MANAGED SERVICES

Vulnerability & Exploit Database

Vulnerabilities and exploits collected over reliable resources for security professionals and researchers to review

Amazon Linux AMI 2: CVE-2021-23841: Security patch for openssl (ALAS-2021-1608)

Severity:
4
CVSS:
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published:
02/16/2020
Created:
02/23/2020
Added:
02/22/2020
Modified:
02/22/2020

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).'

Solution(s)


  • amazon-linux-ami-2-upgrade-openssl
  • amazon-linux-ami-2-upgrade-openssl-debuginfo
  • amazon-linux-ami-2-upgrade-openssl-devel
  • amazon-linux-ami-2-upgrade-openssl-libs
  • amazon-linux-ami-2-upgrade-openssl-perl
  • amazon-linux-ami-2-upgrade-openssl-static

Reference(s)

WHAT WE DO

OTHER SERVICES

Consulting Services

We help your team successfully protect your company within your budget.

LEARN MORE

Application Security Services

Achieve more-secure applications, compliant environments, and safer systems development with streamlined and repeatable processes.

LEARN MORE

Data Security Services

Protectyour critical data across multiple environments, meet privacy regulations and simplify operational complexity.

LEARN MORE

Cloud Security Testing Services

Identify cloud vulnerabilities that tools alone cannot find.

LEARN MORE

Security Risk Services

Secure your operations and respond to threats with accuracy and speed.

LEARN MORE

Cloud Security Monitoring Services

Real-time threat detection across your cloud deployments.

LEARN MORE