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Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2022-2309

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.009
EPSS Ranking 75.2%
CVSS Severity
CVSS v3 Score 5.3
CVSS v2 Score 5.0
References
Products affected by CVE-2022-2309
  • Lxml » Lxml » Version: 0.5
    cpe:2.3:a:lxml:lxml:0.5
  • Lxml » Lxml » Version: 0.5.1
    cpe:2.3:a:lxml:lxml:0.5.1
  • Lxml » Lxml » Version: 0.6
    cpe:2.3:a:lxml:lxml:0.6
  • Lxml » Lxml » Version: 0.7
    cpe:2.3:a:lxml:lxml:0.7
  • Lxml » Lxml » Version: 0.8
    cpe:2.3:a:lxml:lxml:0.8
  • Lxml » Lxml » Version: 0.9
    cpe:2.3:a:lxml:lxml:0.9
  • Lxml » Lxml » Version: 0.9.1
    cpe:2.3:a:lxml:lxml:0.9.1
  • Lxml » Lxml » Version: 0.9.2
    cpe:2.3:a:lxml:lxml:0.9.2
  • Lxml » Lxml » Version: 1.0
    cpe:2.3:a:lxml:lxml:1.0
  • Lxml » Lxml » Version: 1.0.1
    cpe:2.3:a:lxml:lxml:1.0.1
  • Lxml » Lxml » Version: 1.0.2
    cpe:2.3:a:lxml:lxml:1.0.2
  • Lxml » Lxml » Version: 1.0.3
    cpe:2.3:a:lxml:lxml:1.0.3
  • Lxml » Lxml » Version: 1.0.4
    cpe:2.3:a:lxml:lxml:1.0.4
  • Lxml » Lxml » Version: 1.1
    cpe:2.3:a:lxml:lxml:1.1
  • Lxml » Lxml » Version: 1.1.1
    cpe:2.3:a:lxml:lxml:1.1.1
  • Lxml » Lxml » Version: 1.1.2
    cpe:2.3:a:lxml:lxml:1.1.2
  • Lxml » Lxml » Version: 1.2
    cpe:2.3:a:lxml:lxml:1.2
  • Lxml » Lxml » Version: 1.2.1
    cpe:2.3:a:lxml:lxml:1.2.1
  • Lxml » Lxml » Version: 1.3
    cpe:2.3:a:lxml:lxml:1.3
  • Lxml » Lxml » Version: 1.3.1
    cpe:2.3:a:lxml:lxml:1.3.1
  • Lxml » Lxml » Version: 1.3.2
    cpe:2.3:a:lxml:lxml:1.3.2
  • Lxml » Lxml » Version: 1.3.3
    cpe:2.3:a:lxml:lxml:1.3.3
  • Lxml » Lxml » Version: 1.3.4
    cpe:2.3:a:lxml:lxml:1.3.4
  • Lxml » Lxml » Version: 1.3.5
    cpe:2.3:a:lxml:lxml:1.3.5
  • Lxml » Lxml » Version: 1.3.6
    cpe:2.3:a:lxml:lxml:1.3.6
  • Lxml » Lxml » Version: 2.0
    cpe:2.3:a:lxml:lxml:2.0
  • Lxml » Lxml » Version: 2.0.1
    cpe:2.3:a:lxml:lxml:2.0.1
  • Lxml » Lxml » Version: 2.0.10
    cpe:2.3:a:lxml:lxml:2.0.10
  • Lxml » Lxml » Version: 2.0.11
    cpe:2.3:a:lxml:lxml:2.0.11
  • Lxml » Lxml » Version: 2.0.2
    cpe:2.3:a:lxml:lxml:2.0.2
  • Lxml » Lxml » Version: 2.0.3
    cpe:2.3:a:lxml:lxml:2.0.3
  • Lxml » Lxml » Version: 2.0.4
    cpe:2.3:a:lxml:lxml:2.0.4
  • Lxml » Lxml » Version: 2.0.5
    cpe:2.3:a:lxml:lxml:2.0.5
  • Lxml » Lxml » Version: 2.0.6
    cpe:2.3:a:lxml:lxml:2.0.6
  • Lxml » Lxml » Version: 2.0.7
    cpe:2.3:a:lxml:lxml:2.0.7
  • Lxml » Lxml » Version: 2.0.8
    cpe:2.3:a:lxml:lxml:2.0.8
  • Lxml » Lxml » Version: 2.0.9
    cpe:2.3:a:lxml:lxml:2.0.9
  • Lxml » Lxml » Version: 2.1
    cpe:2.3:a:lxml:lxml:2.1
  • Lxml » Lxml » Version: 2.1.1
    cpe:2.3:a:lxml:lxml:2.1.1
  • Lxml » Lxml » Version: 2.1.2
    cpe:2.3:a:lxml:lxml:2.1.2
  • Lxml » Lxml » Version: 2.1.3
    cpe:2.3:a:lxml:lxml:2.1.3
  • Lxml » Lxml » Version: 2.1.4
    cpe:2.3:a:lxml:lxml:2.1.4
  • Lxml » Lxml » Version: 2.1.5
    cpe:2.3:a:lxml:lxml:2.1.5
  • Lxml » Lxml » Version: 2.2
    cpe:2.3:a:lxml:lxml:2.2
  • Lxml » Lxml » Version: 2.2.1
    cpe:2.3:a:lxml:lxml:2.2.1
  • Lxml » Lxml » Version: 2.2.2
    cpe:2.3:a:lxml:lxml:2.2.2
  • Lxml » Lxml » Version: 2.2.3
    cpe:2.3:a:lxml:lxml:2.2.3
  • Lxml » Lxml » Version: 2.2.4
    cpe:2.3:a:lxml:lxml:2.2.4
  • Lxml » Lxml » Version: 2.2.5
    cpe:2.3:a:lxml:lxml:2.2.5
  • Lxml » Lxml » Version: 2.2.6
    cpe:2.3:a:lxml:lxml:2.2.6
  • Lxml » Lxml » Version: 2.2.7
    cpe:2.3:a:lxml:lxml:2.2.7
  • Lxml » Lxml » Version: 2.2.8
    cpe:2.3:a:lxml:lxml:2.2.8
  • Lxml » Lxml » Version: 2.3
    cpe:2.3:a:lxml:lxml:2.3
  • Lxml » Lxml » Version: 2.3.1
    cpe:2.3:a:lxml:lxml:2.3.1
  • Lxml » Lxml » Version: 2.3.2
    cpe:2.3:a:lxml:lxml:2.3.2
  • Lxml » Lxml » Version: 2.3.3
    cpe:2.3:a:lxml:lxml:2.3.3
  • Lxml » Lxml » Version: 2.3.4
    cpe:2.3:a:lxml:lxml:2.3.4
  • Lxml » Lxml » Version: 2.3.5
    cpe:2.3:a:lxml:lxml:2.3.5
  • Lxml » Lxml » Version: 2.3.6
    cpe:2.3:a:lxml:lxml:2.3.6
  • Lxml » Lxml » Version: 3.0
    cpe:2.3:a:lxml:lxml:3.0
  • Lxml » Lxml » Version: 3.0.1
    cpe:2.3:a:lxml:lxml:3.0.1
  • Lxml » Lxml » Version: 3.0.2
    cpe:2.3:a:lxml:lxml:3.0.2
  • Lxml » Lxml » Version: 3.1
    cpe:2.3:a:lxml:lxml:3.1
  • Lxml » Lxml » Version: 3.1.0
    cpe:2.3:a:lxml:lxml:3.1.0
  • Lxml » Lxml » Version: 3.1.1
    cpe:2.3:a:lxml:lxml:3.1.1
  • Lxml » Lxml » Version: 3.1.2
    cpe:2.3:a:lxml:lxml:3.1.2
  • Lxml » Lxml » Version: 3.2.0
    cpe:2.3:a:lxml:lxml:3.2.0
  • Lxml » Lxml » Version: 3.2.1
    cpe:2.3:a:lxml:lxml:3.2.1
  • Lxml » Lxml » Version: 3.2.2
    cpe:2.3:a:lxml:lxml:3.2.2
  • Lxml » Lxml » Version: 3.2.3
    cpe:2.3:a:lxml:lxml:3.2.3
  • Lxml » Lxml » Version: 3.2.4
    cpe:2.3:a:lxml:lxml:3.2.4
  • Lxml » Lxml » Version: 3.2.5
    cpe:2.3:a:lxml:lxml:3.2.5
  • Lxml » Lxml » Version: 3.3.0
    cpe:2.3:a:lxml:lxml:3.3.0
  • Lxml » Lxml » Version: 3.3.1
    cpe:2.3:a:lxml:lxml:3.3.1
  • Lxml » Lxml » Version: 3.3.2
    cpe:2.3:a:lxml:lxml:3.3.2
  • Lxml » Lxml » Version: 3.3.3
    cpe:2.3:a:lxml:lxml:3.3.3
  • Lxml » Lxml » Version: 3.3.4
    cpe:2.3:a:lxml:lxml:3.3.4
  • Lxml » Lxml » Version: 3.3.5
    cpe:2.3:a:lxml:lxml:3.3.5
  • Lxml » Lxml » Version: 3.3.6
    cpe:2.3:a:lxml:lxml:3.3.6
  • Lxml » Lxml » Version: 3.4.0
    cpe:2.3:a:lxml:lxml:3.4.0
  • Lxml » Lxml » Version: 3.4.1
    cpe:2.3:a:lxml:lxml:3.4.1
  • Lxml » Lxml » Version: 3.4.2
    cpe:2.3:a:lxml:lxml:3.4.2
  • Lxml » Lxml » Version: 3.4.3
    cpe:2.3:a:lxml:lxml:3.4.3
  • Lxml » Lxml » Version: 3.4.4
    cpe:2.3:a:lxml:lxml:3.4.4
  • Lxml » Lxml » Version: 3.5.0
    cpe:2.3:a:lxml:lxml:3.5.0
  • Lxml » Lxml » Version: 3.6.0
    cpe:2.3:a:lxml:lxml:3.6.0
  • Lxml » Lxml » Version: 3.6.1
    cpe:2.3:a:lxml:lxml:3.6.1
  • Lxml » Lxml » Version: 3.6.2
    cpe:2.3:a:lxml:lxml:3.6.2
  • Lxml » Lxml » Version: 3.6.3
    cpe:2.3:a:lxml:lxml:3.6.3
  • Lxml » Lxml » Version: 3.6.4
    cpe:2.3:a:lxml:lxml:3.6.4
  • Lxml » Lxml » Version: 3.7.0
    cpe:2.3:a:lxml:lxml:3.7.0
  • Lxml » Lxml » Version: 3.7.1
    cpe:2.3:a:lxml:lxml:3.7.1
  • Lxml » Lxml » Version: 3.7.2
    cpe:2.3:a:lxml:lxml:3.7.2
  • Lxml » Lxml » Version: 3.8.0
    cpe:2.3:a:lxml:lxml:3.8.0
  • Lxml » Lxml » Version: 4.0.0
    cpe:2.3:a:lxml:lxml:4.0.0
  • Lxml » Lxml » Version: 4.1.0
    cpe:2.3:a:lxml:lxml:4.1.0
  • Lxml » Lxml » Version: 4.1.1
    cpe:2.3:a:lxml:lxml:4.1.1
  • Lxml » Lxml » Version: 4.2.0
    cpe:2.3:a:lxml:lxml:4.2.0
  • Lxml » Lxml » Version: 4.2.1
    cpe:2.3:a:lxml:lxml:4.2.1
  • Lxml » Lxml » Version: 4.2.2
    cpe:2.3:a:lxml:lxml:4.2.2
  • Lxml » Lxml » Version: 4.2.3
    cpe:2.3:a:lxml:lxml:4.2.3
  • Lxml » Lxml » Version: 4.2.4
    cpe:2.3:a:lxml:lxml:4.2.4
  • Lxml » Lxml » Version: 4.2.5
    cpe:2.3:a:lxml:lxml:4.2.5
  • Lxml » Lxml » Version: 4.2.6
    cpe:2.3:a:lxml:lxml:4.2.6
  • Lxml » Lxml » Version: 4.3.0
    cpe:2.3:a:lxml:lxml:4.3.0
  • Lxml » Lxml » Version: 4.3.1
    cpe:2.3:a:lxml:lxml:4.3.1
  • Lxml » Lxml » Version: 4.3.2
    cpe:2.3:a:lxml:lxml:4.3.2
  • Lxml » Lxml » Version: 4.3.3
    cpe:2.3:a:lxml:lxml:4.3.3
  • Lxml » Lxml » Version: 4.3.4
    cpe:2.3:a:lxml:lxml:4.3.4
  • Lxml » Lxml » Version: 4.3.5
    cpe:2.3:a:lxml:lxml:4.3.5
  • Lxml » Lxml » Version: 4.4.0
    cpe:2.3:a:lxml:lxml:4.4.0
  • Lxml » Lxml » Version: 4.4.1
    cpe:2.3:a:lxml:lxml:4.4.1
  • Lxml » Lxml » Version: 4.4.2
    cpe:2.3:a:lxml:lxml:4.4.2
  • Lxml » Lxml » Version: 4.4.3
    cpe:2.3:a:lxml:lxml:4.4.3
  • Lxml » Lxml » Version: 4.5.0
    cpe:2.3:a:lxml:lxml:4.5.0
  • Lxml » Lxml » Version: 4.5.1
    cpe:2.3:a:lxml:lxml:4.5.1
  • Lxml » Lxml » Version: 4.5.2
    cpe:2.3:a:lxml:lxml:4.5.2
  • Lxml » Lxml » Version: 4.6.0
    cpe:2.3:a:lxml:lxml:4.6.0
  • Lxml » Lxml » Version: 4.6.1
    cpe:2.3:a:lxml:lxml:4.6.1
  • Lxml » Lxml » Version: 4.6.2
    cpe:2.3:a:lxml:lxml:4.6.2
  • Lxml » Lxml » Version: 4.6.3
    cpe:2.3:a:lxml:lxml:4.6.3
  • Lxml » Lxml » Version: 4.6.4
    cpe:2.3:a:lxml:lxml:4.6.4
  • Lxml » Lxml » Version: 4.6.4-1
    cpe:2.3:a:lxml:lxml:4.6.4-1
  • Lxml » Lxml » Version: 4.6.4-2
    cpe:2.3:a:lxml:lxml:4.6.4-2
  • Lxml » Lxml » Version: 4.6.4-3
    cpe:2.3:a:lxml:lxml:4.6.4-3
  • Lxml » Lxml » Version: 4.6.4-4
    cpe:2.3:a:lxml:lxml:4.6.4-4
  • Lxml » Lxml » Version: 4.6.4-5
    cpe:2.3:a:lxml:lxml:4.6.4-5
  • Lxml » Lxml » Version: 4.6.5
    cpe:2.3:a:lxml:lxml:4.6.5
  • Lxml » Lxml » Version: 4.7.0
    cpe:2.3:a:lxml:lxml:4.7.0
  • Lxml » Lxml » Version: 4.7.1
    cpe:2.3:a:lxml:lxml:4.7.1
  • Lxml » Lxml » Version: 4.8.0
    cpe:2.3:a:lxml:lxml:4.8.0
  • Lxml » Lxml » Version: 4.9.0
    cpe:2.3:a:lxml:lxml:4.9.0
  • Xmlsoft » Libxml2 » Version: 2.9.10
    cpe:2.3:a:xmlsoft:libxml2:2.9.10
  • Xmlsoft » Libxml2 » Version: 2.9.11
    cpe:2.3:a:xmlsoft:libxml2:2.9.11
  • Xmlsoft » Libxml2 » Version: 2.9.12
    cpe:2.3:a:xmlsoft:libxml2:2.9.12
  • Xmlsoft » Libxml2 » Version: 2.9.13
    cpe:2.3:a:xmlsoft:libxml2:2.9.13
  • Xmlsoft » Libxml2 » Version: 2.9.14
    cpe:2.3:a:xmlsoft:libxml2:2.9.14
  • Fedoraproject » Fedora » Version: 36
    cpe:2.3:o:fedoraproject:fedora:36
  • Fedoraproject » Fedora » Version: 37
    cpe:2.3:o:fedoraproject:fedora:37


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