Nokogiri NULL Pointer Dereference
A NULL pointer dereference vulnerability exists in the `xpath.c:xmlXPathCompOpEval()` function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the `XPATH_OP_AND` or `XPATH_OP_OR` case. Applications processing untrusted XSL format inputs with the use of the libxml2 library may be vulnerable to a denial of service attack due to a crash of the application.
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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2018-14404US | high7.5 | — | ||
A NULL pointer dereference vulnerability exists in the xpath.c:xmlXPathCompOpEval() function of libxml2 through 2.9.8 when parsing an invalid XPath expression in the XPATH_OP_AND o… | ||||
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references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2019:1543WEB
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901817WEB
- https://bugzilla.redhat.com/show_bug.cgi?id=1595985WEB
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/nokogiri/CVE-2018-14404.ymlWEB
- https://github.com/sparklemotion/nokogiri/issues/1785WEB
- https://gitlab.gnome.org/GNOME/libxml2/issues/10WEB
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.htmlWEB
- https://lists.debian.org/debian-lts-announce/2020/09/msg00009.htmlWEB
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