OESA-2023-1886 (CVE-2023-0836)

Vulnerability from osv_openeuler – Published: 2023-12-08 11:06 – Updated: 2026-08-06 11:06 – Source website
VLAI
Summary
haproxy security update
Details

HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world's most visited ones.

Security Fix(es):

An information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.(CVE-2023-0836)

HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.(CVE-2023-45539)

Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "haproxy-2.2.16-7.oe1.aarch64.rpm",
          "haproxy-debuginfo-2.2.16-7.oe1.aarch64.rpm",
          "haproxy-debugsource-2.2.16-7.oe1.aarch64.rpm"
        ],
        "noarch": [
          "haproxy-help-2.2.16-7.oe1.noarch.rpm"
        ],
        "src": [
          "haproxy-2.2.16-7.oe1.src.rpm"
        ],
        "x86_64": [
          "haproxy-2.2.16-7.oe1.x86_64.rpm",
          "haproxy-debugsource-2.2.16-7.oe1.x86_64.rpm",
          "haproxy-debuginfo-2.2.16-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "haproxy",
        "purl": "pkg:rpm/openEuler/haproxy\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.16-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "haproxy-2.2.16-7.oe1.aarch64.rpm",
          "haproxy-debuginfo-2.2.16-7.oe1.aarch64.rpm",
          "haproxy-debugsource-2.2.16-7.oe1.aarch64.rpm"
        ],
        "noarch": [
          "haproxy-help-2.2.16-7.oe1.noarch.rpm"
        ],
        "src": [
          "haproxy-2.2.16-7.oe1.src.rpm"
        ],
        "x86_64": [
          "haproxy-debugsource-2.2.16-7.oe1.x86_64.rpm",
          "haproxy-debuginfo-2.2.16-7.oe1.x86_64.rpm",
          "haproxy-2.2.16-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "haproxy",
        "purl": "pkg:rpm/openEuler/haproxy\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.16-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "haproxy-debugsource-2.4.8-6.oe2203.aarch64.rpm",
          "haproxy-2.4.8-6.oe2203.aarch64.rpm",
          "haproxy-debuginfo-2.4.8-6.oe2203.aarch64.rpm"
        ],
        "noarch": [
          "haproxy-help-2.4.8-6.oe2203.noarch.rpm"
        ],
        "src": [
          "haproxy-2.4.8-6.oe2203.src.rpm"
        ],
        "x86_64": [
          "haproxy-2.4.8-6.oe2203.x86_64.rpm",
          "haproxy-debuginfo-2.4.8-6.oe2203.x86_64.rpm",
          "haproxy-debugsource-2.4.8-6.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "haproxy",
        "purl": "pkg:rpm/openEuler/haproxy\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.4.8-6.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "HAProxy is a free, very fast and reliable solution offering high availability, load balancing, and proxying for TCP and HTTP-based applications. It is particularly suited for very high traffic web sites and powers quite a number of the world\u0026apos;s most visited ones.\r\n\r\nSecurity Fix(es):\r\n\r\nAn information leak vulnerability was discovered in HAProxy 2.1, 2.2 before 2.2.27, 2.3, 2.4 before 2.4.21, 2.5 before 2.5.11, 2.6 before 2.6.8, 2.7 before 2.7.1. There are 5 bytes left uninitialized in the connection buffer when encoding the FCGI_BEGIN_REQUEST record. Sensitive data may be disclosed to configured FastCGI backends in an unexpected way.(CVE-2023-0836)\r\n\r\nHAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.(CVE-2023-45539)",
  "id": "OESA-2023-1886",
  "modified": "2026-08-06T11:06:19Z",
  "published": "2023-12-08T11:06:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1886"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0836"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-45539"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "haproxy security update",
  "upstream": [
    "CVE-2023-0836",
    "CVE-2023-45539"
  ]
}



Log in or create an account to share your comment.




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.


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.