Skip to content
Noroxi
CVE-2023-2977· NVD / CVE Program· CNA redhat

A vulnerbility was found in OpenSC.

Noroxi assessment

Priority: Monitor (action score 28/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.29% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: opensc (AlmaLinux:8) 0.20.0-6.el8; opensc (AlmaLinux:9) 0.23.0-2.el9; opensc (Debian:10) 0.19.0-1+deb10u2.

Low priority for now. Upgrade to opensc (AlmaLinux:8) 0.20.0-6.el8; opensc (AlmaLinux:9) 0.23.0-2.el9; opensc (Debian:10) 0.19.0-1+deb10u2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.1 · v3.1—No exploit Fix available
Published
May 31, 2023
Updated
Jun 17, 2026
EPSS
0.2% · 20th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-2977

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for opensc project records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
opensc projectopensc
redhatenterprise linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • opensc project opensc0.23.0
  • redhat enterprise linux8.0
  • redhat enterprise linux9.0

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a OpenSC

    • opensc-0.23.0affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8openscbefore 0.20.0-6.el80.20.0-6.el8
AlmaLinux:9openscbefore 0.23.0-2.el90.23.0-2.el9
Debian:10openscbefore 0.19.0-1+deb10u20.19.0-1+deb10u2
Debian:11openscbefore 0.21.0-1+deb11u10.21.0-1+deb11u1
Debian:12openscbefore 0.23.0-0.30.23.0-0.3
openSUSE:Leap Micro 5.3openscbefore 0.22.0-150400.3.3.10.22.0-150400.3.3.1
openSUSE:Tumbleweedopenscbefore 0.23.0-2.10.23.0-2.1
Red Hat:enterprise_linux:8::baseosopenscbefore 0:0.20.0-6.el80:0.20.0-6.el8
Red Hat:enterprise_linux:8::baseosopensc-debuginfobefore 0:0.20.0-6.el80:0.20.0-6.el8
Red Hat:enterprise_linux:8::baseosopensc-debugsourcebefore 0:0.20.0-6.el80:0.20.0-6.el8
Red Hat:enterprise_linux:9::baseosopenscbefore 0:0.23.0-2.el90:0.23.0-2.el9
Red Hat:enterprise_linux:9::baseosopensc-debuginfobefore 0:0.23.0-2.el90:0.23.0-2.el9
Red Hat:enterprise_linux:9::baseosopensc-debugsourcebefore 0:0.23.0-2.el90:0.23.0-2.el9
SUSE:Linux Enterprise Micro 5.3openscbefore 0.22.0-150400.3.3.10.22.0-150400.3.3.1
SUSE:Linux Enterprise Real Time 15 SP3openscbefore 0.19.0-150100.3.22.10.19.0-150100.3.22.1
SUSE:Linux Enterprise Server 12 SP5openscbefore 0.13.0-3.22.10.13.0-3.22.1

Same product

opensc project: all records

Other highest-scoring records for the same primary product.

  • CVE-2019-6502sc_context_create in ctx.c in libopensc in OpenSC 0.19.0 has a memory leak, as demonstrated by a call from eidenv.
    31Monitor
  • CVE-2021-34193Stack overflow vulnerability in OpenSC smart card middleware before 0.23 via crafted responses to APDUs.
    30Monitor
  • CVE-2019-16058An issue was discovered in the pam_p11 component 0.2.0 and 0.3.0 for OpenSC.
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-42781Apr 18, 2022 · Heap buffer overflow issues were found in Opensc before version 0.22.0 in pkcs15-oberthur.c that could potentially crash programs using the
    22Monitor
  • ← EarlierCVE-2021-42782Apr 18, 2022 · Stack buffer overflow issues were found in Opensc before version 0.22.0 in various places that could potentially crash programs using the li
    22Monitor
  • Later →CVE-2023-40660Nov 6, 2023 · Opensc: potential pin bypass when card tracks its own login state
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:opensc0.23.0-2.el9 · AlmaLinux:9Package registry (OSV)
debian:opensc0.23.0-0.3 · Debian:12Package registry (OSV)
opensuse:opensc0.22.0-150400.3.3.1 · openSUSE:Leap Micro 5.3Package registry (OSV)
red hat:opensc0:0.23.0-2.el9 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:opensc-debuginfo0:0.23.0-2.el9 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
red hat:opensc-debugsource0:0.23.0-2.el9 · Red Hat:enterprise_linux:9::baseosPackage registry (OSV)
suse:opensc0.13.0-3.22.1 · SUSE:Linux Enterprise Server 12 SP5Package registry (OSV)
suse:opensc0.22.0-150400.3.3.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records