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VulnerabilityPublished Updated

CVE-2024-2511: openssl vulnerabilities

Affects opensslSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2024-2511· Medium 5.9

Not known to be exploited · CVSS 5.9 Medium · fixed in 1.1.1f-1ubuntu2.23 : update openssl when convenient.

Data as of 9 Nov 2026, 14:47 UTC

CVSS 3.1 base score
5.9Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.15.9
Patch
Available – fixed in 1.1.1f-1ubuntu2.23, 3.0.2-0ubuntu1.17, 3.0.13-0ubuntu3.2
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 2024

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Upgrade the Ubuntu openssl to 1.1.1f-1ubuntu2.23 (package) or 3.0.2-0ubuntu1.17 (package) or 3.0.13-0ubuntu3.2 (package).

Affected software

ProductAffectedFixed in
Ubuntu 24.04 LTSopensslpkg:deb/ubuntu/openssl?arch=source&distro=nobleOther threatsAffected
  • <3.0.13-0ubuntu3.2
Fixed in
  • 3.0.13-0ubuntu3.2
Ubuntu 22.04 LTSopensslpkg:deb/ubuntu/openssl?arch=source&distro=jammyOther threatsAffected
  • <3.0.2-0ubuntu1.17
Fixed in
  • 3.0.2-0ubuntu1.17
Ubuntu 20.04 LTSopensslpkg:deb/ubuntu/openssl?arch=source&distro=focalOther threatsAffected
  • <1.1.1f-1ubuntu2.23
Fixed in
  • 1.1.1f-1ubuntu2.23

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Apply the official Ubuntu security updates as detailed in USN-6937-1 to upgrade OpenSSL to fixed versions: 1.1.1f-1ubuntu2.23 for Ubuntu 20.04 LTS, 3.0.2-0ubuntu1.17 for Ubuntu 22.04 LTS, and 3.0.13-0ubuntu3.2 for Ubuntu 24.04 LTS. After updating, reboot the system to ensure all changes take effect. No additional mitigation steps are required beyond applying these patches.

Description

Multiple vulnerabilities were discovered in OpenSSL affecting Ubuntu 20.04 LTS, 22.04 LTS, and 24.04 LTS. These include improper handling of TLSv1.3 sessions under certain server configurations (CVE-2024-2511), incorrect checking of excessively long DSA keys or parameters (CVE-2024-4603), memory operation flaws in a rarely-used API that could lead to crashes or code execution (CVE-2024-4741), and improper handling of an API call with an empty client protocols buffer that could expose sensitive information or cause crashes (CVE-2024-5535). These issues can lead to denial of service or potentially arbitrary code execution. Fixed package versions have been released for all affected Ubuntu LTS versions.

References

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