Vulnerability-Lookup

CVE-2024-39894 (GCVE-0-2024-39894)

Vulnerability from cvelistv5 – Published: 2024-07-02 00:00 – Updated: 2025-11-04 16:12

Summary

OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-03 13:15 UTC

CWE

n/a
CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

mitre mitre root

References

12 references

URL	Tags
https://www.openssh.com/txt/release-9.8
https://lists.mindrot.org/pipermail/openssh-unix-…
https://www.openwall.com/lists/oss-security/2024/…
http://www.openwall.com/lists/oss-security/2024/07/03/6	mailing-list
https://security.netapp.com/advisory/ntap-2024071…
http://www.openwall.com/lists/oss-security/2024/07/23/4	mailing-list
http://www.openwall.com/lists/oss-security/2024/07/23/6	mailing-list
http://www.openwall.com/lists/oss-security/2024/07/28/3	mailing-list
https://crzphil.github.io/posts/ssh-obfuscation-bypass/
https://news.ycombinator.com/item?id=41508530
https://www.freebsd.org/security/advisories/FreeB…
http://seclists.org/fulldisclosure/2024/Sep/33

Impacted products

1 product

Vendor	Product	Version	CPE status
openbsd	openssh	Affected: 9.5 , ≤ 9.7 (custom) cpe:2.3:a:openbsd:openssh:9.5:-::::::

Show details on NVD website

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    "redhat_vex": {
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      "product_status:known_not_affected": "41",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssh: Logic error in ObscureKeystrokeTiming",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-39894.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-09-11T02:15:12Z",
      "cve": "CVE-2024-39894",
      "id": "CVE-2024-39894",
      "initial_release_date": "2024-07-04T03:12:47Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "215",
      "product_status:recommended": "115",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-39894",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-39894.json",
      "version": "62"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.openssh.com/txt/release-9.8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://www.openwall.com/lists/oss-security/2024/07/02/1\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/6\", \"name\": \"[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240712-0004/\", \"tags\": [\"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/4\", \"name\": \"[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/6\", \"name\": \"[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG\", \"tags\": [\"mailing-list\", \"x_transferred\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/28/3\", \"name\": \"[oss-security] 20240728 Re: Announce: OpenSSH 9.8 released\", \"tags\": [\"mailing-list\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:33:11.961Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"REQUIRED\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-39894\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-07-03T13:15:38.073610Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:openbsd:openssh:9.5:-:*:*:*:*:*:*\"], \"vendor\": \"openbsd\", \"product\": \"openssh\", \"versions\": [{\"status\": \"affected\", \"version\": \"9.5\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"9.7\"}], \"defaultStatus\": \"unknown\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-367\", \"description\": \"CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-07-03T13:10:41.799Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"references\": [{\"url\": \"https://www.openssh.com/txt/release-9.8\"}, {\"url\": \"https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html\"}, {\"url\": \"https://www.openwall.com/lists/oss-security/2024/07/02/1\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/03/6\", \"name\": \"[oss-security] 20240703 Re: Announce: OpenSSH 9.8 released\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://security.netapp.com/advisory/ntap-20240712-0004/\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/4\", \"name\": \"[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/23/6\", \"name\": \"[oss-security] 20240723 Re: linux-distros application for CentOS Project\u0027s Hyperscale SIG\", \"tags\": [\"mailing-list\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2024/07/28/3\", \"name\": \"[oss-security] 20240728 Re: Announce: OpenSSH 9.8 released\", \"tags\": [\"mailing-list\"]}, {\"url\": \"https://crzphil.github.io/posts/ssh-obfuscation-bypass/\"}, {\"url\": \"https://news.ycombinator.com/item?id=41508530\"}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2024-09-11T15:12:12.186999\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-39894\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-11T15:12:12.186999\", \"dateReserved\": \"2024-07-02T00:00:00\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2024-07-02T00:00:00\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}

SUSE-SU-2024:2393-1

Vulnerability from csaf_suse - Published: 2024-07-10 15:33 - Updated: 2024-07-10 15:33

Summary

Security update for openssh

Severity

Moderate

Scope

2 vulnerabilities in this advisory, including CVE-2024-39894.

CVE-2024-39894

5.9 (Medium)


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

Recommended: 68 products

Open the full advisory

SUSE-SU-2025:20009-1

Vulnerability from csaf_suse - Published: 2025-02-03 08:47 - Updated: 2025-02-03 08:47

Summary

Security update for openssh

Severity

Critical

Scope

4 vulnerabilities in this advisory, including CVE-2024-39894.

CVE-2024-39894

5.9 (Medium)


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

Recommended: 18 products

Open the full advisory

ubuntu-cve-2024-39894

Vulnerability from osv_ubuntu

Published

2024-07-02 18:15

Modified

2025-09-08 17:01

Summary

Details

Severity

7.5 (High)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2024-39894	REPORT
	https://www.cve.org/CVERecord?id=CVE-2024-39894	REPORT
	https://lists.mindrot.org/pipermail/openssh-unix-…	REPORT
	https://www.openwall.com/lists/oss-security/2024/…	REPORT
	https://www.openssh.com/txt/release-9.8	REPORT
	https://ubuntu.com/security/notices/USN-6887-1	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "openssh-client",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          },
          {
            "binary_name": "openssh-server",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          },
          {
            "binary_name": "openssh-sftp-server",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          },
          {
            "binary_name": "openssh-tests",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          },
          {
            "binary_name": "ssh",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          },
          {
            "binary_name": "ssh-askpass-gnome",
            "binary_version": "1:9.6p1-3ubuntu13.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "openssh",
        "purl": "pkg:deb/ubuntu/openssh@1:9.6p1-3ubuntu13.4?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:9.6p1-3ubuntu13.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1:9.3p1-1ubuntu3",
        "1:9.4p1-1ubuntu1",
        "1:9.6p1-3ubuntu1",
        "1:9.6p1-3ubuntu2",
        "1:9.6p1-3ubuntu11",
        "1:9.6p1-3ubuntu12",
        "1:9.6p1-3ubuntu13",
        "1:9.6p1-3ubuntu13.3"
      ]
    }
  ],
  "aliases": [],
  "details": "OpenSSH 9.5 through 9.7 before 9.8 sometimes allows timing attacks against echo-off password entry (e.g., for su and Sudo) because of an ObscureKeystrokeTiming logic error. Similarly, other timing attacks against keystroke entry could occur.",
  "id": "UBUNTU-CVE-2024-39894",
  "modified": "2025-09-08T17:01:42Z",
  "published": "2024-07-02T18:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-39894"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-39894"
    },
    {
      "type": "REPORT",
      "url": "https://lists.mindrot.org/pipermail/openssh-unix-announce/2024-July/000158.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.openwall.com/lists/oss-security/2024/07/02/1"
    },
    {
      "type": "REPORT",
      "url": "https://www.openssh.com/txt/release-9.8"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-6887-1"
    }
  ],
  "related": [
    "USN-6887-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-39894"
  ]
}

VDE-2024-071

Vulnerability from csaf_phoenixcontactgmbhcokg - Published: 2024-12-09 11:00 - Updated: 2025-05-22 13:03

Summary

Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware

Severity

Critical

Scope

6 vulnerabilities in this advisory, including CVE-2024-39894.

CVE-2024-39894

7.5 (High)


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

Fixed: 6 products Known affected: 8 products

Open the full advisory

WID-SEC-W-2024-1514

Vulnerability from csaf_certbund - Published: 2024-07-03 22:00 - Updated: 2026-06-02 22:00

Summary

OpenSSH: Schwachstelle ermöglicht Offenlegung von Informationen

Severity

Niedrig

Scope

1 vulnerability in this advisory, including CVE-2024-39894.

CVE-2024-39894

Known affected: 18 products

Open the full advisory

WID-SEC-W-2024-2154

Vulnerability from csaf_certbund - Published: 2024-09-16 22:00 - Updated: 2025-03-11 23:00

Summary

Apple macOS: Mehrere Schwachstellen

Severity

Hoch

Scope

112 vulnerabilities in this advisory, including CVE-2024-39894.

CVE-2024-39894

Known affected: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2024-39894 (GCVE-0-2024-39894)

SUSE-SU-2024:2393-1

SUSE-SU-2025:20009-1

ubuntu-cve-2024-39894

Vulnerability from osv_ubuntu

VDE-2024-071

WID-SEC-W-2024-1514

WID-SEC-W-2024-2154

Tags

Sightings

Nomenclature

Related by attack behaviour