CVE-2022-23476CWE-252CWE-476

Unchecked return value from xmlTextReaderExpand in Nokogiri

High · published December 8, 2022

CVSS v3.1
7.5
EPSS
2%
Percentile
78.6
In the wild
Unconfirmed
What it is

Nokogiri is an open source XML and HTML library for the Ruby programming language. Nokogiri `1.13.8` and `1.13.9` fail to check the return value from `xmlTextReaderExpand` in the method `Nokogiri::XML::Reader#attribute_hash`. This can lead to a null pointer exception when invalid markup is being parsed. For applications using `XML::Reader` to parse untrusted inputs, this may potentially be a vector for a denial of service attack. Users are advised to upgrade to Nokogiri `>= 1.13.10`. Users may be able to search their code for calls to either `XML::Reader#attributes` or `XML::Reader#attribute_hash` to determine if they are affected.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01823 · 78.6th percentile
Weaknesses
CWE-252 · Unchecked Return Value; CWE-476 · NULL Pointer Dereference
Published
2022-12-08T03:03Z
EPSS history
Timeline
  • 08 DEC 03:03Z
    Unchecked return value from xmlTextReaderExpand in Nokogiri
    cvelistv5