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CVE-2023-2977

7.1 · HIGH

A vulnerbility was found in OpenSC.

Published Jun 1, 2023CWE-119EPSS 0.29%

Overview

CVE-2023-2977 is a high-severity vulnerability. It was published on June 1, 2023 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A vulnerbility was found in OpenSC. This security flaw cause a buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package. The attacker can supply a smart card package with malformed ASN1 context. The cardos_have_verifyrc_package function scans the ASN1 buffer for 2 tags, where remaining length is wrongly caculated due to moved starting pointer. This leads to possible heap-based buffer oob read. In cases where ASAN is enabled while compiling this causes a crash. Further info leak or more damage is possible.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/security/cve/CVE-2023-2977Refbugzilla.redhat.com/show_bug.cgi?id=2211088GitHubgithub.com/OpenSC/OpenSC/issues/2785GitHubgithub.com/OpenSC/OpenSC/pull/2787Reflists.debian.org/debian-lts-announce/2023/06/msg00025.htmlReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/Refaccess.redhat.com/security/cve/CVE-2023-2977Refbugzilla.redhat.com/show_bug.cgi?id=2211088GitHubgithub.com/OpenSC/OpenSC/issues/2785

How CyberStrike helps

Frequently asked questions

What is CVE-2023-2977?

CVE-2023-2977 is a high-severity vulnerability. It was published on June 1, 2023 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2023-2977?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-2977?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-2977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-2977 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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