CVE-2023-2977: Buffer Overflow
First published: Tue May 30 2023(Updated: )
A vulnerability was found in OpenSC. This issue causes a buffer overrun in the pkcs15 cardos_have_verifyrc_package. This flaw allows an attacker to supply a smart card package with a malformed ASN1 context. The cardos_have_verifyrc_package function scans the ASN1 buffer for two tags, where the remaining length is wrongly calculated due to a moved starting pointer, leading to a possible heap-based buffer out-of-bounds read. In cases where ASN is enabled while compiling, this problem causes a crash, and further information leaks or more damage is likely.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Opensc Project Opensc | =0.23.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 |
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Reference Links
- https://github.com/OpenSC/OpenSC/issues/2785
- https://access.redhat.com/security/cve/CVE-2023-2977
- https://github.com/OpenSC/OpenSC/pull/2787
- https://bugzilla.redhat.com/show_bug.cgi?id=2211088
- https://www.cve.org/CVERecord?id=CVE-2023-2977 https://nvd.nist.gov/vuln/detail/CVE-2023-2977
- 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LAR54OV6EHA56B4XJF6RNPQ4HJ2ITU66/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FJD4Q4AJSGE5UIJI7OUYZY4HGGCVYQNI/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2211091
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2211092
- https://access.redhat.com/errata/RHSA-2023:6587
- https://access.redhat.com/errata/RHSA-2023:7160
Frequently Asked Questions
What is the vulnerability ID for this OpenSC vulnerability?
The vulnerability ID for this OpenSC vulnerability is CVE-2023-2977.
What is the severity of CVE-2023-2977?
CVE-2023-2977 has a severity rating of 7.1 (high).
What is the impact of the buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package?
The buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package allows an attacker to supply a smart card package with a malformed ASN1 context, potentially leading to arbitrary code execution or a denial of service.
Which versions of OpenSC are affected by CVE-2023-2977?
OpenSC version 0.23.0 is affected by CVE-2023-2977.
How can I fix the CVE-2023-2977 vulnerability in OpenSC?
To fix the CVE-2023-2977 vulnerability in OpenSC, update to a version that includes the fix provided in the OpenSC GitHub repository pull request.
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