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01 Record

CVE-2023-6237

Excessive time spent checking invalid RSA public keys

MediumPUBLISHEDCNA: openssl
CNA base score5.9 CVSS v3.xCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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02 Description

Excessive time spent checking invalid RSA public keys

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
2.30% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 82.8% of scored records. A rank, not a probability.
NVD base score
5.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Deferred. NVD last modified this record on 2026-10-14.
Red Hat severity
Low. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-04-25 06:27Z2 YR AGO
Last updated
2026-10-14 22:15Z14 DAYS AGO
Reserved
2023-11-21
Assigning CNA
openssl
Record state
PUBLISHED
Severity
Medium (CVSS 5.9)
CNA CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
  • CWE-606Unchecked Input for Loop ConditionBase
Data version
5.2
Document digest
3c70d4d0fe225c124139561b4e9c791ff0ff3ed979711eca88be16f809cf4f29

05 Affected products

VendorProductVersionsPlatforms
OpenSSLOpenSSL3.0.0 to < 3.0.13, 3.1.0 to < 3.1.5, 3.2.0 to < 3.2.1—

06 References

07 Fixed in

AlmaLinux 9

  • edk2-aarch64
    Fixed in 20240524-6.el9_5
  • edk2-ovmf
    Fixed in 20240524-6.el9_5
  • edk2-tools
    Fixed in 20240524-6.el9_5
  • edk2-tools-doc
    Fixed in 20240524-6.el9_5
  • openssl
    Fixed in 1:3.0.7-27.el9
  • openssl-devel
    Fixed in 1:3.0.7-27.el9
  • openssl-libs
    Fixed in 1:3.0.7-27.el9
  • openssl-perl
    Fixed in 1:3.0.7-27.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • edk2-aarch64
    Fixed in 20240524-6.el9_5
  • edk2-ovmf
    Fixed in 20240524-6.el9_5
  • edk2-tools
    Fixed in 20240524-6.el9_5
  • edk2-tools-doc
    Fixed in 20240524-6.el9_5
  • openssl
    Fixed in 1:3.0.7-27.el9
  • openssl-devel
    Fixed in 1:3.0.7-27.el9
  • openssl-libs
    Fixed in 1:3.0.7-27.el9
  • openssl-perl
    Fixed in 1:3.0.7-27.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • openssl
    Fixed in 3.0.13-1~deb12u1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • openssl
    Fixed in 3.1.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • openssl
    Fixed in 3.1.5-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • openssl
    Fixed in 3.0.2-0ubuntu1.14

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • edk2
    Fixed in 2024.02-2ubuntu0.6
  • openssl
    Fixed in 3.0.10-1ubuntu4

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 22.04 LTS

  • nodejs
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-preview 22.04 LTS

  • openssl
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro FIPS-updates 22.04 LTS

  • openssl
    Fixed in 3.0.2-0ubuntu1.14+Fips1
    Available with Ubuntu Pro: https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.