This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============6222426212040645871==
Content-Type: multipart/signed; micalg=pgp-sha256;
 protocol="application/pgp-signature";
 boundary="VGRT8Ghtdsxh08YoYieGZtiBUGpMMte4e"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--VGRT8Ghtdsxh08YoYieGZtiBUGpMMte4e
Content-Type: multipart/mixed;
 boundary="k0vB9KQCJYsTfRQ5Nv87qjFcNwKwAfJIg";
 protected-headers="v1"
From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
 <ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <94fda97c-73b1-56e3-95e9-c9f71ccdfd3d@canonical.com>
Subject: [USN-4940-1] PyYAML vulnerability

--k0vB9KQCJYsTfRQ5Nv87qjFcNwKwAfJIg
Content-Type: text/plain; charset=utf-8
Content-Language: en-C
Content-Transfer-Encoding: quoted-printable

==========================================================================
Ubuntu Security Notice USN-4940-1
May 10, 2021

pyyaml vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS

Summary:

PyYAML could be made to run programs if it opened a specially crafted YAML
file.

Software Description:
- pyyaml: YAML parser and emitter for Python

Details:

It was discovered that PyYAML incorrectly handled untrusted YAML files with
the FullLoader loader. A remote attacker could possibly use this issue to
execute arbitrary code.

Update instructions:

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

Ubuntu 20.10:
  python3-yaml                    5.3.1-2ubuntu0.1

Ubuntu 20.04 LTS:
  python-yaml                     5.3.1-1ubuntu0.1
  python3-yaml                    5.3.1-1ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-4940-1
  CVE-2020-14343

Package Information:
  https://launchpad.net/ubuntu/+source/pyyaml/5.3.1-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/pyyaml/5.3.1-1ubuntu0.1


--k0vB9KQCJYsTfRQ5Nv87qjFcNwKwAfJIg--

--VGRT8Ghtdsxh08YoYieGZtiBUGpMMte4e
Content-Type: application/pgp-signature; name="OpenPGP_signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature"

-----BEGIN PGP SIGNATURE-----
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=jW3B
-----END PGP SIGNATURE-----

--VGRT8Ghtdsxh08YoYieGZtiBUGpMMte4e--


--===============6222426212040645871==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

LS0gCnVidW50dS1zZWN1cml0eS1hbm5vdW5jZSBtYWlsaW5nIGxpc3QKdWJ1bnR1LXNlY3VyaXR5
LWFubm91bmNlQGxpc3RzLnVidW50dS5jb20KTW9kaWZ5IHNldHRpbmdzIG9yIHVuc3Vic2NyaWJl
IGF0OiBodHRwczovL2xpc3RzLnVidW50dS5jb20vbWFpbG1hbi9saXN0aW5mby91YnVudHUtc2Vj
dXJpdHktYW5ub3VuY2UK

--===============6222426212040645871==--