CVE-2023-2977

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-06-01 · updated 2026-06-17
Weakness: CWE-119

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.

Affected products

OpenSC: 0.23.0
Red Hat Enterprise Linux: 8.0, 9.0

References

https://access.redhat.com/security/cve/CVE-2023-2977
https://bugzilla.redhat.com/show_bug.cgi?id=2211088
https://github.com/OpenSC/OpenSC/issues/2785
https://github.com/OpenSC/OpenSC/pull/2787
https://lists.debian.org/debian-lts-announce/2023/06/msg00025.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/
https://access.redhat.com/security/cve/CVE-2023-2977
https://bugzilla.redhat.com/show_bug.cgi?id=2211088
https://github.com/OpenSC/OpenSC/issues/2785
https://github.com/OpenSC/OpenSC/pull/2787
https://lists.debian.org/debian-lts-announce/2023/06/msg00025.html

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