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No exploitation reportedFix available

CVE-2023-5992

Opensc: side-channel leaks while stripping encryption pkcs#1 padding

No exploitation reported by the sources we read.

  • Published2024-01-31
  • WeaknessCWE-203

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.

Timeline

dates in UTC
  1. 2024-01-3114:05CVE publishedCNA

Versions per branch

NVD
Redhat enterprise linux
BranchAffectedFixed in
7.0= 7.0no fix published
8.0= 8.0no fix published
9.0= 9.0no fix published
Redhat enterprise linux for arm 64
BranchAffectedFixed in
8.0= 8.0_aarch64no fix published
9.0= 9.0_aarch64no fix published
Redhat enterprise linux for ibm z systems
BranchAffectedFixed in
8.0= 8.0_s390xno fix published
9.0= 9.0_s390xno fix published

8 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA3 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-05

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • openscUbuntu:Pro:24.04:LTSall versions · fixed in 0.25.0~rc1-1ubuntu0.1~esm1
  • openscUbuntu:Pro:22.04:LTSall versions · fixed in 0.22.0-1ubuntu2+esm1
  • openscUbuntu:Pro:20.04:LTSall versions · fixed in 0.20.0-3ubuntu0.1~esm2
  • openscUbuntu:Pro:18.04:LTSall versions · fixed in 0.17.0-3ubuntu0.1~esm2
  • openscUbuntu:Pro:16.04:LTSall versions · fixed in 0.15.0-1ubuntu1+esm2
  • openscTuxCare:AlmaLinux:9.2all versions · fixed in 0.22.0-2.el9_2.tuxcare.els5
  • openscSUSE:Linux Micro 6.1all versions · fixed in 0.24.0-slfo.1.1_2.1
  • openscSUSE:Linux Micro 6.0all versions · fixed in 0.24.0-4.1

35 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-5992 Red Hat Product Security32 products fixed · 2 known affected

    OpenSC: Side-channel leaks while stripping encryption PKCS#1 padding

    opensc as a component of Red Hat Enterprise Linux 7 · opensc.src as a component of Red Hat Enterprise Linux 7

  • RHSA-2024:0967 Red Hat Product Security16 products fixed

    Red Hat Security Advisory: opensc security update

  • RHSA-2024:0966 Red Hat Product Security16 products fixed

    Red Hat Security Advisory: opensc security update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2024:0967 · 16 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  2. No fix available, says the vendor Red Hat Product Security CVE-2023-5992 · 2 productsAffected

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2024-01-31
Last Modified
2026-11-05
NVD status
Modified
GitHub Advisory
GHSA-554m-v42f-hcq9

Frequently asked questions

What is CVE-2023-5992?

A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.

Is CVE-2023-5992 actively exploited?

Active exploitation of CVE-2023-5992 has not been confirmed. Its EPSS score was 1.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-5992?

CVE-2023-5992 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record