libphp-mailer: Overwrite Arbitrary Files -- Remote/Unauthenticated

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3171
                    USN-4505-1: PHPMailer vulnerability
                             17 September 2020

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

Product:           libphp-mailer
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Overwrite Arbitrary Files -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-13625  

Reference:         ESB-2020.2632
                   ESB-2020.2043

Original Bulletin: 
   https://usn.ubuntu.com/4505-1/

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USN-4505-1: PHPMailer vulnerability
16 September 2020

Attachments with specially crafted filenames could bypass filename-based
mail attachment filters.
Releases

  o Ubuntu 18.04 LTS

Packages

  o libphp-phpmailer - full featured email transfer class for PHP

Details

Elar Lang discovered that PHPMailer did not properly escape double quote
characters in filenames. A remote attacker could possibly exploit this
with a crafted filename to bypass attachment filters that are based on
matching filename extensions. (CVE-2020-13625)

Update instructions

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

Ubuntu 18.04

  o libphp-phpmailer - 5.2.14+dfsg-2.3+deb9u2build0.18.04.1

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

References

  o CVE-2020-13625

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