[DRE-maint] Bug#978967: ruby-nokogiri: CVE-2020-26247

[Salvatore Bonaccorso]

Source: ruby-nokogiri
Version: 1.10.9+dfsg-1
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>
Control: found -1 1.10.0+dfsg1-2

Hi,

The following vulnerability was published for ruby-nokogiri.

CVE-2020-26247[0]:
| 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.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2020-26247
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26247
[1] https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-vr8q-g5c7-m54m
[2] https://github.com/sparklemotion/nokogiri/commit/9c87439d9afa14a365ff13e73adc809cb2c3d97b

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore