Vulnerability-Lookup

alsa-2025:23481

Vulnerability from osv_almalinux

Published

2025-12-17 00:00

Modified

2025-12-21 20:00

Summary

Moderate: openssh security update

Details

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand (CVE-2025-61984)
openssh: OpenSSH: Null character in ssh:// URI can lead to code execution via ProxyCommand (CVE-2025-61985)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "openssh"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0p1-27.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "openssh-askpass"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0p1-27.el8_10"
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          "type": "ECOSYSTEM"
        }
      ]
    },
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        "ecosystem": "AlmaLinux:8",
        "name": "openssh-cavs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
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        "ecosystem": "AlmaLinux:8",
        "name": "openssh-clients"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
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          "type": "ECOSYSTEM"
        }
      ]
    },
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        "name": "openssh-keycat"
      },
      "ranges": [
        {
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            },
            {
              "fixed": "8.0p1-27.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "openssh-ldap"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0p1-27.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "openssh-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.0p1-27.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:8",
        "name": "pam_ssh_agent_auth"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.3-7.27.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.  \n\nSecurity Fix(es):  \n\n  * openssh: OpenSSH: Control characters in usernames can lead to code execution via ProxyCommand (CVE-2025-61984)\n  * openssh: OpenSSH: Null character in ssh:// URI can lead to code execution via ProxyCommand (CVE-2025-61985)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2025:23481",
  "modified": "2025-12-21T20:00:09Z",
  "published": "2025-12-17T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2025:23481"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-61984"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2025-61985"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2401960"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2401962"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/8/ALSA-2025-23481.html"
    }
  ],
  "related": [
    "CVE-2025-61984",
    "CVE-2025-61985"
  ],
  "summary": "Moderate: openssh security update"
}

CVE-2025-61984 (GCVE-0-2025-61984)

Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-11-11 14:50

Summary

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)

Severity ?

3.6 (Low)


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

CWE

CWE-159 - Improper Handling of Invalid Use of Special Elements

Assigner

mitre

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2025/…
	https://marc.info/?l=openssh-unix-dev&m=175974522…
	https://www.openssh.com/releasenotes.html#10.1p1

Impacted products

	Vendor	Product	Version
	OpenBSD	OpenSSH	Affected: 0 , < 10.1 (custom)

Show details on NVD website

JSON

To clipboard

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CVE-2025-61985 (GCVE-0-2025-61985)

Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-10-06 18:34

Summary

ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used.

Severity ?

3.6 (Low)


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

CWE

CWE-158 - Improper Neutralization of Null Byte or NUL Character

Assigner

mitre

References

URL

Tags

	https://www.openwall.com/lists/oss-security/2025/…
	https://marc.info/?l=openssh-unix-dev&m=175974522…
	https://www.openssh.com/releasenotes.html#10.1p1

Impacted products

	Vendor	Product	Version
	OpenBSD	OpenSSH	Affected: 0 , < 10.1 (custom)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

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.

Action not permitted

alsa-2025:23481

Vulnerability from osv_almalinux

CVE-2025-61984 (GCVE-0-2025-61984)

CVE-2025-61985 (GCVE-0-2025-61985)

Tags

Sightings

Nomenclature