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Fencer Vulns
high 7.1

CVE-2023-2977 json

A vulnerbility was found in OpenSC.

published 2023-06-01 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-34418

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 22%
public exploits
0
none known

Summary

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.

Patch / fix

  • opensc Debian 14, Debian 13, Debian 12 0.23.0-0.3

debian advisories DEBIAN-CVE-2023-2977

  • opensc Ubuntu Pro 16.04 LTS 0.15.0-1ubuntu1+esm2
  • opensc Ubuntu Pro 18.04 LTS 0.17.0-3ubuntu0.1~esm2
  • opensc Ubuntu Pro 20.04 LTS 0.20.0-3ubuntu0.1~esm4
  • opensc Ubuntu Pro 22.04 LTS 0.22.0-1ubuntu2+esm1

ubuntu advisories UBUNTU-CVE-2023-2977

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • opensc RHEL 8 0.20.0-6.el8
  • opensc RHEL 9 0.23.0-2.el9

red hat advisories RHSA-2023:7160RHSA-2023:6587

  • opensc SLE Module for Basesystem 15 SP5, SLE Module for Basesystem 15 SP4, SLE Micro 5.4 +4 more 0.22.0-150400.3.3.1
  • opensc SLE Real Time 15 SP3, SLE Micro 5.2, SLE Micro 5.1 0.19.0-150100.3.22.1
  • opensc SLES for SAP 12 SP5, SLES 12 SP5 0.13.0-3.22.1

suse advisories SUSE-SU-2023:2516-1SUSE-SU-2023:2508-1SUSE-SU-2023:2466-1

  • opensc openSUSE Tumbleweed 0.23.0-2.1

opensuse advisories openSUSE-SU-2024:12968-1

  • opensc AlmaLinux 8 0.20.0-6.el8
  • opensc AlmaLinux 9 0.23.0-2.el9

almalinux advisories ALSA-2023:7160ALSA-2023:6587

  • opensc CBL-Mariner 2.0, Azure Linux 3.0 0.22.0-3

azure linux advisories AZL-27012AZL-35073

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-2977 updated cvss 6.3

opensc: buffer overrun vulnerability in pkcs15 cardos_have_verifyrc_package

  • Red Hat Enterprise Linux 7 opensc
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux BaseOS (v. 8) opensc 0.20.0-6.el8
    fixed: vendor fix RHSA-2023:7160
  • Red Hat Enterprise Linux BaseOS (v. 9) opensc 0.23.0-2.el9
    fixed: vendor fix RHSA-2023:6587

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
21 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
NVD 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CNA 3.1 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Affected products

  • n/a OpenSC

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-125 Out-of-bounds Read

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.