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CVE-2023-2977

Date: May 31, 2023

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.

Language: C

Severity Score

Related Resources (10)

https://access.redhat.com/security/cve/CVE-2023-2977
https://github.com/OpenSC/OpenSC/issues/2785
https://lists.debian.org/debian-lts-announce/2023/06/msg00025.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/
https://bugzilla.redhat.com/show_bug.cgi?id=2211088
https://security-tracker.debian.org/tracker/CVE-2023-2977
https://nvd.nist.gov/vuln/detail/CVE-2023-2977
https://github.com/OpenSC/OpenSC/pull/2787
https://www.mend.io/vulnerability-database/CVE-2023-2977

Severity Score

Weakness Type (CWE)

Buffer Errors

CWE-119

Out-of-bounds Read

CWE-125

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): HIGH

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