CVE-2021-42781 Memory corruption in opensc

What is CVE-2021-42781?

CVE-2021-42781 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 18 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap buffer overflow issues were found in Opensc before version 0.22.0 in pkcs15-oberthur.c that could potentially crash programs using the library.

Weakness: CWE-787, CWE-119

Which versions are affected by CVE-2021-42781?

It affects 3 products.

Products include Fedoraproject Fedora, Opensc Project Opensc, Redhat Enterprise Linux.

How do I fix CVE-2021-42781?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-42781 being exploited?

There is no known exploitation of CVE-2021-42781 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-9484, DEBIAN-CVE-2021-42781, GHSA-93j9-4rqq-x6gr, OESA-2022-1640.