ESB-2020.3159 – [Ubuntu] Loofah: Cross-site scripting – Remote with user interaction

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3159
                     USN-4498-1: Loofah vulnerability
                             16 September 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Loofah
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Cross-site Scripting -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-15587  

Reference:         ESB-2019.3981
                   ESB-2019.3939

Original Bulletin: 
   https://usn.ubuntu.com/4498-1/

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USN-4498-1: Loofah vulnerability
15 September 2020

Loofah could be made to perform XSS attacks if a crafted SVG element is
republished
Releases

  o Ubuntu 16.04 LTS

Packages

  o ruby-loofah - manipulation and transformation of HTML/XML documents and
    fragments

Details

It was discovered that Loofah does not properly sanitize JavaScript in
sanitized output. An attacker could possibly use this issue to perform
XSS attacks. (CVE-2019-15587)

Update instructions

The problem can be corrected by updating your system to the following package
versions:

Ubuntu 16.04

  o ruby-loofah - 2.0.3-2+deb9u3build0.16.04.1

In general, a standard system update will make all the necessary changes.

References

  o CVE-2019-15587

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