Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed in Nokogiri version 1.11.0.rc4.

The remote Debian 10 host has a package installed that is affected by multiple vulnerabilities as referenced in the dla-3149 advisory.

  - A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a     subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method     `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This     vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by     Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was     addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.
    (CVE-2019-5477)

  - Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In     Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by     Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network,     potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by     Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed     in Nokogiri version 1.11.0.rc4. (CVE-2020-26247)

  - Nokogiri is an open source XML and HTML library for Ruby. Nokogiri `< v1.13.4` contains an inefficient     regular expression that is susceptible to excessive backtracking when attempting to detect encoding in     HTML documents. Users are advised to upgrade to Nokogiri `>= 1.13.4`. There are no known workarounds for     this issue. (CVE-2022-24836)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote host is affected by the vulnerability described in GLSA-202208-29 (Nokogiri: Multiple Vulnerabilities)

  - Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In     Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by     Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network,     potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by     Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed     in Nokogiri version 1.11.0.rc4. (CVE-2020-26247)

  - Nokogiri is an open source XML and HTML library for Ruby. Nokogiri `< v1.13.4` contains an inefficient     regular expression that is susceptible to excessive backtracking when attempting to detect encoding in     HTML documents. Users are advised to upgrade to Nokogiri `>= 1.13.4`. There are no known workarounds for     this issue. (CVE-2022-24836)

  - Nokogiri is an open source XML and HTML library for Ruby. Nokogiri prior to version 1.13.6 does not type-     check all inputs into the XML and HTML4 SAX parsers, allowing specially crafted untrusted inputs to cause     illegal memory access errors (segfault) or reads from unrelated memory. Version 1.13.6 contains a patch     for this issue. As a workaround, ensure the untrusted input is a `String` by calling `#to_s` or     equivalent. (CVE-2022-29181)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2021:4702 advisory.

  - python-ecdsa: Unexpected and  undocumented exceptions during signature decoding (CVE-2019-14853)

  - python-ecdsa: DER encoding is not being verified in signatures (CVE-2019-14859)

  - rubygem-activerecord-session_store: hijack sessions by using timing attacks targeting the session id     (CVE-2019-25025)

  - rake: OS Command Injection via egrep in Rake::FileList (CVE-2020-8130)

  - guava: local information disclosure via temporary directory created with unsafe permissions     (CVE-2020-8908)

  - PyYAML: incomplete fix for CVE-2020-1747 (CVE-2020-14343)

  - rubygem-nokogiri: XML external entity injection via Nokogiri::XML::Schema (CVE-2020-26247)

  - Satellite: Azure compute resource secret_key leak to authenticated users (CVE-2021-3413)

  - foreman: possible man-in-the-middle in smart_proxy realm_freeipa (CVE-2021-3494)

  - Satellite: BMC controller credential leak via API (CVE-2021-20256)

  - python-aiohttp: Open redirect in aiohttp.web_middlewares.normalize_path_middleware (CVE-2021-21330)

  - rubygem-actionpack: Possible Information Disclosure / Unintended Method Execution in Action Pack     (CVE-2021-22885)

  - rails: Possible Denial of Service vulnerability in Action Dispatch (CVE-2021-22902)

  - rails: Possible DoS Vulnerability in Action Controller Token Authentication (CVE-2021-22904)

  - django: potential directory-traversal via uploaded files (CVE-2021-28658)

  - rubygem-puma: incomplete fix for CVE-2019-16770 allows Denial of Service (DoS) (CVE-2021-29509)

  - django: Potential directory-traversal via uploaded files (CVE-2021-31542)

  - rubygem-addressable: ReDoS in templates (CVE-2021-32740)

  - django: Potential directory traversal via ``admindocs`` (CVE-2021-33203)

  - python-urllib3: ReDoS in the parsing of authority part of URL (CVE-2021-33503)

  - django: Possible indeterminate SSRF, RFI, and LFI attacks since validators accepted leading zeros in IPv4     addresses (CVE-2021-33571)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the rubygem package has been released.

  - A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a     subprocess via Ruby's `Kernel.open` method. Processes are vulnerable only if the undocumented method     `Nokogiri::CSS::Tokenizer#load_file` is being called with unsafe user input as the filename. This     vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by     Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was     addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.
    (CVE-2019-5477)

  - Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In     Nokogiri before version 1.11.0.rc4 there is an XXE vulnerability. XML Schemas parsed by     Nokogiri::XML::Schema are trusted by default, allowing external resources to be accessed over the network,     potentially enabling XXE or SSRF attacks. This behavior is counter to the security policy followed by     Nokogiri maintainers, which is to treat all input as untrusted by default whenever possible. This is fixed     in Nokogiri version 1.11.0.rc4. (CVE-2020-26247)

  - Nokogiri is a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support. In     Nokogiri v1.12.4 and earlier, on JRuby only, the SAX parser resolves external entities by default. Users     of Nokogiri on JRuby who parse untrusted documents using any of these classes are affected:
    Nokogiri::XML::SAX::Parse, Nokogiri::HTML4::SAX::Parser or its alias Nokogiri::HTML::SAX::Parser,     Nokogiri::XML::SAX::PushParser, and Nokogiri::HTML4::SAX::PushParser or its alias     Nokogiri::HTML::SAX::PushParser. JRuby users should upgrade to Nokogiri v1.12.5 or later to receive a     patch for this issue. There are no workarounds available for v1.12.4 or earlier. CRuby users are not     affected. (CVE-2021-41098)

An update of the rubygem package has been released.

An XXE vulnerability was found in Nokogiri, a Rubygem providing HTML, XML, SAX, and Reader parsers with XPath and CSS selector support.

XML Schemas parsed by Nokogiri::XML::Schema were trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks. The new default behavior is to treat all input as untrusted. The upstream advisory provides further information how to mitigate the problem or restore the old behavior again.

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8 q-g5c7-m54m

For Debian 9 stretch, this problem has been fixed in version 1.6.8.1-1+deb9u1.

We recommend that you upgrade your ruby-nokogiri packages.

For the detailed security status of ruby-nokogiri please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/ruby-nokogiri

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for rubygem-nokogiri fixes the following issues:
rubygem-nokogiri was updated to 1.8.5 (bsc#1156722).

Security issues fixed :

  - CVE-2019-5477: Fixed a command injection vulnerability     (bsc#1146578).

  - CVE-2020-26247: Fixed an XXE vulnerability in     Nokogiri::XML::Schema (bsc#1180507).

This update was imported from the SUSE:SLE-15:Update update project.

Nokogiri reports :

In Nokogiri versions <= 1.11.0.rc3, XML Schemas parsed by Nokogiri::XML::Schema were trusted by default, allowing external resources to be accessed over the network, potentially enabling XXE or SSRF attacks.

ID	Name	Product	Family	Severity
166069	Debian DLA-3149-1 : ruby-nokogiri - LTS security update	Nessus	Debian Local Security Checks	critical
164110	GLSA-202208-29 : Nokogiri: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	high
155377	RHEL 7 : Satellite 6.10 Release (Moderate) (RHSA-2021:4702)	Nessus	Red Hat Local Security Checks	critical
155347	Photon OS 2.0: Rubygem PHSA-2021-2.0-0413	Nessus	PhotonOS Local Security Checks	critical
152091	Photon OS 4.0: Rubygem PHSA-2021-4.0-0068	Nessus	PhotonOS Local Security Checks	medium
150309	Debian DLA-2678-1 : ruby-nokogiri security update	Nessus	Debian Local Security Checks	medium
146274	openSUSE Security Update : rubygem-nokogiri (openSUSE-2021-237)	Nessus	SuSE Local Security Checks	critical
145257	FreeBSD : nokogiri -- Security vulnerability (13c54e6d-5c45-11eb-b4e2-001b217b3468)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2020-26247

medium

Tenable Plugins

critical

high

critical

critical

medium

medium

critical

medium