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RHSA-2026:65119

Vulnerability from csaf_redhat - Published: 2026-09-08 07:43 - Updated: 2026-09-08 22:49
Summary
Red Hat Security Advisory: Red Hat Directory Server 13.2 container image update
Severity
Important
Notes
Topic: An updated Red Hat Directory Server 13.2 container image for RHEL 10 is now available in the Red Hat container registry, including bug fixes and security patches.
Details: Red Hat Directory Server is an LDAPv3-compliant directory server. The image is maintained by Red Hat and updated regularly. To pull this container image, run the following command: podman pull registry.redhat.io/dirsrv/dirsrv-container-rhel10:13.2
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-18355

A heap buffer overflow flaw was found in the SASL I/O layer of 389 Directory Server (389-ds-base). In sasl_io_start_packet(), the wrapped-record length read from the wire is validated only against an upper bound. A small wire length (0, 1, or 2) produces an encrypted_buffer_count below the already-consumed encrypted_buffer_offset, causing an unsigned subtraction underflow in sasl_io_read_packet(). PR_Recv is then requested to read approximately 4 GiB into a 1024-byte heap buffer, resulting in a heap buffer overflow with attacker-controlled content. After a successful SASL bind with integrity protection (SSF > 0), a remote authenticated attacker can cause a denial of service or potentially achieve remote code execution. This flaw is distinct from CVE-2026-11774, whose fix only guards against upper-bound overflow.

7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-191 - Integer Underflow (Wrap or Wraparound)
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-18453

A flaw was found in 389 Directory Server. A missing NULL pointer check in the paged results handling of op_shared_search allows an unauthenticated remote attacker to crash the LDAP server by sending a crafted sequence of search requests using the USE_ONE_BACKEND control, resulting in denial of service.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 - NULL Pointer Dereference
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-76560

A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client's empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE-863 - Incorrect Authorization
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-78701

A flaw was found in 389-ds-base. A remote, authenticated attacker could exploit a vulnerability in the Simple Authentication and Security Layer (SASL) UNBIND process. By sending a specially crafted request, the attacker can cause a connection to stall, leading to resource exhaustion and a Denial of Service (DoS) for the server.

6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-787 - Out-of-bounds Write
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
References
URL Category
https://access.redhat.com/errata/RHSA-2026:65119 self
https://access.redhat.com/security/cve/CVE-2026-18355 external
https://access.redhat.com/security/cve/CVE-2026-18453 external
https://access.redhat.com/security/cve/CVE-2026-76560 external
https://access.redhat.com/security/cve/CVE-2026-78701 external
https://access.redhat.com/security/updates/classi… external
https://catalog.redhat.com/software/containers/search external
https://docs.redhat.com/en/documentation/red_hat_… external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-18355 self
https://bugzilla.redhat.com/show_bug.cgi?id=2509186 external
https://www.cve.org/CVERecord?id=CVE-2026-18355 external
https://nvd.nist.gov/vuln/detail/CVE-2026-18355 external
https://access.redhat.com/security/cve/CVE-2026-18453 self
https://bugzilla.redhat.com/show_bug.cgi?id=2509696 external
https://www.cve.org/CVERecord?id=CVE-2026-18453 external
https://nvd.nist.gov/vuln/detail/CVE-2026-18453 external
https://access.redhat.com/security/cve/CVE-2026-76560 self
https://bugzilla.redhat.com/show_bug.cgi?id=2519521 external
https://www.cve.org/CVERecord?id=CVE-2026-76560 external
https://nvd.nist.gov/vuln/detail/CVE-2026-76560 external
https://access.redhat.com/security/cve/CVE-2026-78701 self
https://bugzilla.redhat.com/show_bug.cgi?id=2523232 external
https://www.cve.org/CVERecord?id=CVE-2026-78701 external
https://nvd.nist.gov/vuln/detail/CVE-2026-78701 external
Acknowledgments
Ada Logics Arthur Chan David Korczynski Adam Korczynski
Anthropic Team
Ada Logics Arthur Chan
Calif.io Gia Bui (yabeow)
To clipboard 

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            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:65119"
        },
        {
          "category": "workaround",
          "details": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.",
          "product_ids": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "389-ds-base: 389-ds-base: pre-authentication NULL pointer dereference via paged results and USE_ONE_BACKEND control in op_shared_search"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Gia Bui (yabeow)"
          ],
          "organization": "Calif.io"
        }
      ],
      "cve": "CVE-2026-76560",
      "cwe": {
        "id": "CWE-863",
        "name": "Incorrect Authorization"
      },
      "discovery_date": "2026-08-15T16:11:15+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2519521"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in 389 Directory Server. The SELFDN ACI bind-rule evaluator incorrectly matches an anonymous LDAP client\u0027s empty bind DN against an empty stored attribute value, allowing an unauthenticated client to satisfy access control checks intended to require a matching authenticated identity. This can allow an anonymous LDAP client to perform an operation, such as adding or modifying a directory entry, that a SELFDN-based ACI intended to restrict to a specific authenticated user.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw affects any 389 Directory Server (or Red Hat Directory Server) deployment that defines an ACI using a userattr=\"attribute#SELFDN\" or userattr=\"attribute#USERDN\" bind rule on an attribute that is permitted to hold an explicit empty value. Red Hat Directory Server does not ship such an ACI by default; real-world impact depends on whether a specific deployment or consuming application defines an ACI of this shape.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-76560"
        },
        {
          "category": "external",
          "summary": "RHBZ#2519521",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2519521"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-76560",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-76560"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-76560",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-76560"
        }
      ],
      "release_date": "2026-09-07T12:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:43:22+00:00",
          "details": "The container image provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the \"podman pull\" command. For more information about the image, search the \u003cimage_name\u003e in the Red Hat Ecosystem Catalog: https://catalog.redhat.com/software/containers/search",
          "product_ids": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:65119"
        },
        {
          "category": "workaround",
          "details": "Until a fix is available, review all ACIs using userattr=\"...#SELFDN\" bind rules and confirm the target attribute cannot be set to an empty value, or add an explicit authmethod restriction to the ACI to prevent anonymous binds from satisfying the check. Where anonymous binds are not required, disabling anonymous access to the directory removes the attack surface entirely.",
          "product_ids": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "389-ds-base: 389-ds: anonymous LDAP client can defeat SELFDN ACI bind-rule checks via empty bind DN"
    },
    {
      "cve": "CVE-2026-78701",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2026-08-25T04:44:36.218000+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2523232"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in 389-ds-base. A remote, authenticated attacker could exploit a vulnerability in the Simple Authentication and Security Layer (SASL) UNBIND process. By sending a specially crafted request, the attacker can cause a connection to stall, leading to resource exhaustion and a Denial of Service (DoS) for the server.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "389-ds-base: 389-ds-base: CVE-2026-11610 incomplete fix may introduce a connection-stall DoS",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-78701"
        },
        {
          "category": "external",
          "summary": "RHBZ#2523232",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2523232"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-78701",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-78701"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-78701",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78701"
        }
      ],
      "release_date": "2026-08-24T12:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-09-08T07:43:22+00:00",
          "details": "The container image provided by this update can be downloaded from the Red Hat container registry at registry.redhat.io using the \"podman pull\" command. For more information about the image, search the \u003cimage_name\u003e in the Red Hat Ecosystem Catalog: https://catalog.redhat.com/software/containers/search",
          "product_ids": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:65119"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, restrict network access to the 389-ds-base service to only trusted clients and networks. This can be achieved by configuring firewall rules to limit inbound connections to the LDAP ports (typically 389 for LDAP and 636 for LDAPS) to known, authorized IP addresses or subnets.\n\nExample using `firewalld`:\n```bash\n# firewall-cmd --permanent --add-rich-rule=\u0027rule family=\"ipv4\" source address=\"\u003cTRUSTED_IP_OR_SUBNET\u003e\" port port=\"389\" protocol=\"tcp\" accept\u0027\n# firewall-cmd --permanent --add-rich-rule=\u0027rule family=\"ipv4\" source address=\"\u003cTRUSTED_IP_OR_SUBNET\u003e\" port port=\"636\" protocol=\"tcp\" accept\u0027\n# firewall-cmd --reload\n```\nReplace `\u003cTRUSTED_IP_OR_SUBNET\u003e` with the actual IP addresses or network ranges of your trusted clients. This action may impact legitimate clients if not configured correctly. A service restart is not required for firewall changes to take effect.",
          "product_ids": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Red Hat Directory Server 13.2:registry.redhat.io/dirsrv/dirsrv-container-rhel10@sha256:d69a0f6a61eb3bd773e4b49be6b6093dd413e7a3a24b30df31d804031f3b5889_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "389-ds-base: 389-ds-base: CVE-2026-11610 incomplete fix may introduce a connection-stall DoS"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.