fkie_cve-2022-2309
Vulnerability from fkie_nvd
Published
2022-07-05 10:15
Modified
2024-11-21 07:00
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.
References
security@huntr.devhttps://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6fPatch, Third Party Advisory
security@huntr.devhttps://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105baExploit, Issue Tracking, Patch, Third Party Advisory
security@huntr.devhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/
security@huntr.devhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/
security@huntr.devhttps://security.gentoo.org/glsa/202208-06Third Party Advisory
security@huntr.devhttps://security.netapp.com/advisory/ntap-20220915-0006/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6fPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105baExploit, Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202208-06Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20220915-0006/Third Party Advisory
Impacted products
Vendor Product Version
lxml lxml *
xmlsoft libxml2 *
fedoraproject fedora 36
fedoraproject fedora 37


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:lxml:lxml:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "738BCE63-2B47-4CFA-9915-C3DE1A3AA9A9",
                     versionEndExcluding: "4.9.1",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "E1774300-F6CA-43CA-A6FD-6A302814FB5D",
                     versionEndIncluding: "2.9.14",
                     versionStartIncluding: "2.9.10",
                     vulnerable: false,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
         operator: "AND",
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
                     matchCriteriaId: "5C675112-476C-4D7C-BCB9-A2FB2D0BC9FD",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*",
                     matchCriteriaId: "E30D0E6F-4AE8-4284-8716-991DFA48CC5D",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "NULL Pointer Dereference allows attackers to cause a denial of service (or application crash). This only applies when lxml is used together with libxml2 2.9.10 through 2.9.14. libxml2 2.9.9 and earlier are not affected. It allows triggering crashes through forged input data, given a vulnerable code sequence in the application. The vulnerability is caused by the iterwalk function (also used by the canonicalize function). Such code shouldn't be in wide-spread use, given that parsing + iterwalk would usually be replaced with the more efficient iterparse function. However, an XML converter that serialises to C14N would also be vulnerable, for example, and there are legitimate use cases for this code sequence. If untrusted input is received (also remotely) and processed via iterwalk function, a crash can be triggered.",
      },
      {
         lang: "es",
         value: "Una desreferencia de puntero NULL permite a atacantes causar una denegación de servicio (o bloqueo de la aplicación). Esto solo se aplica cuando lxml se usa junto con libxml2 versiones 2.9.10 hasta 2.9.14. libxml2 versiones 2.9.9 y anteriores no están afectados. Permite desencadenar bloqueos por medio de datos de entrada falsificados, dada una secuencia de código vulnerable en la aplicación. La vulnerabilidad es causada por la función iterwalk (también utilizada por la función canonicalize). Dicho código no debería tener un uso generalizado, dado que parsing + iterwalk generalmente se reemplazaría con la función iterparse más eficiente. Sin embargo, un convertidor XML que serializa a C14N también sería vulnerable, por ejemplo, y existen casos de uso legítimos para esta secuencia de código. Si se recibe una entrada que no es de confianza (también de forma remota) y se procesa por medio de la función iterwalk, se puede desencadenar un bloqueo",
      },
   ],
   id: "CVE-2022-2309",
   lastModified: "2024-11-21T07:00:44.473",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "NONE",
               availabilityImpact: "PARTIAL",
               baseScore: 5,
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               vectorString: "AV:N/AC:L/Au:N/C:N/I:N/A:P",
               version: "2.0",
            },
            exploitabilityScore: 10,
            impactScore: 2.9,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV30: [
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "LOW",
               baseScore: 5.3,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "NONE",
               integrityImpact: "NONE",
               privilegesRequired: "NONE",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
               version: "3.0",
            },
            exploitabilityScore: 3.9,
            impactScore: 1.4,
            source: "security@huntr.dev",
            type: "Secondary",
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               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",
            },
            exploitabilityScore: 3.9,
            impactScore: 3.6,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2022-07-05T10:15:08.763",
   references: [
      {
         source: "security@huntr.dev",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f",
      },
      {
         source: "security@huntr.dev",
         tags: [
            "Exploit",
            "Issue Tracking",
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba",
      },
      {
         source: "security@huntr.dev",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/",
      },
      {
         source: "security@huntr.dev",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/",
      },
      {
         source: "security@huntr.dev",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.gentoo.org/glsa/202208-06",
      },
      {
         source: "security@huntr.dev",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.netapp.com/advisory/ntap-20220915-0006/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://github.com/lxml/lxml/commit/86368e9cf70a0ad23cccd5ee32de847149af0c6f",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Exploit",
            "Issue Tracking",
            "Patch",
            "Third Party Advisory",
         ],
         url: "https://huntr.dev/bounties/8264e74f-edda-4c40-9956-49de635105ba",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HGYC6L7ENH5VEGN3YWFBYMGKX6WNS7HZ/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/URHHSIBTPTALXMECRLAC2EVDNAFSR5NO/",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.gentoo.org/glsa/202208-06",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Third Party Advisory",
         ],
         url: "https://security.netapp.com/advisory/ntap-20220915-0006/",
      },
   ],
   sourceIdentifier: "security@huntr.dev",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-476",
            },
         ],
         source: "security@huntr.dev",
         type: "Primary",
      },
   ],
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.