Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.4343
USN-4665-1: curl vulnerabilities
10 December 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: curl
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Denial of Service -- Remote/Unauthenticated
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8286 CVE-2020-8285 CVE-2020-8284
CVE-2020-8231
Reference: ESB-2020.3320
ESB-2020.3016
ESB-2020.2869
ESB-2020.2865
Original Bulletin:
https://ubuntu.com/security/notices/USN-4665-1
https://ubuntu.com/security/notices/USN-4665-2
Comment: This bulletin contains two (2) Ubuntu security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
USN-4665-1: curl vulnerabilities
09 December 2020
Several security issues were fixed in curl.
Releases
o Ubuntu 20.10
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Packages
o curl - HTTP, HTTPS, and FTP client and client libraries
Details
Marc Aldorasi discovered that curl incorrectly handled the libcurl
CURLOPT_CONNECT_ONLY option. This could result in data being sent to the
wrong destination, possibly exposing sensitive information. This issue only
affected Ubuntu 20.10. (CVE-2020-8231)
Varnavas Papaioannou discovered that curl incorrectly handled FTP PASV
responses. An attacker could possibly use this issue to trick curl into
connecting to an arbitrary IP address and be used to perform port scanner
and other information gathering. (CVE-2020-8284)
It was discovered that curl incorrectly handled FTP wildcard matchins. A
remote attacker could possibly use this issue to cause curl to consume
resources and crash, resulting in a denial of service. (CVE-2020-8285)
It was discovered that curl incorrectly handled OCSP response verification.
A remote attacker could possibly use this issue to provide a fraudulent
OCSP response. (CVE-2020-8286)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.10
o curl - 7.68.0-1ubuntu4.2
o libcurl3-gnutls - 7.68.0-1ubuntu4.2
o libcurl3-nss - 7.68.0-1ubuntu4.2
o libcurl4 - 7.68.0-1ubuntu4.2
Ubuntu 20.04
o curl - 7.68.0-1ubuntu2.4
o libcurl3-gnutls - 7.68.0-1ubuntu2.4
o libcurl3-nss - 7.68.0-1ubuntu2.4
o libcurl4 - 7.68.0-1ubuntu2.4
Ubuntu 18.04
o curl - 7.58.0-2ubuntu3.12
o libcurl3-gnutls - 7.58.0-2ubuntu3.12
o libcurl3-nss - 7.58.0-2ubuntu3.12
o libcurl4 - 7.58.0-2ubuntu3.12
Ubuntu 16.04
o curl - 7.47.0-1ubuntu2.18
o libcurl3 - 7.47.0-1ubuntu2.18
o libcurl3-gnutls - 7.47.0-1ubuntu2.18
o libcurl3-nss - 7.47.0-1ubuntu2.18
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-8286
o CVE-2020-8285
o CVE-2020-8231
o CVE-2020-8284
Related notices
o USN-4665-2 : libcurl3-gnutls, curl, libcurl3-nss, libcurl3
o USN-4466-1 : libcurl4, libcurl3-gnutls, curl, libcurl3-nss, libcurl3
o USN-4466-2 : libcurl3-gnutls, curl, libcurl3-nss
- ------------------------------------------------------------------------------
USN-4665-2: curl vulnerabilities
09 December 2020
Several security issues were fixed in curl.
Releases
o Ubuntu 14.04 ESM
o Ubuntu 12.04 ESM
Packages
o curl - HTTP, HTTPS, and FTP client and client libraries
Details
USN-4665-1 fixed several vulnerabilities in curl. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
Varnavas Papaioannou discovered that curl incorrectly handled FTP PASV
responses. An attacker could possibly use this issue to trick curl into
connecting to an arbitrary IP address and be used to perform port scanner
and other information gathering. (CVE-2020-8284)
It was discovered that curl incorrectly handled FTP wildcard matchins. A
remote attacker could possibly use this issue to cause curl to consume
resources and crash, resulting in a denial of service. (CVE-2020-8285)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 14.04
o curl - 7.35.0-1ubuntu2.20+esm6
o libcurl3 - 7.35.0-1ubuntu2.20+esm6
o libcurl3-gnutls - 7.35.0-1ubuntu2.20+esm6
o libcurl3-nss - 7.35.0-1ubuntu2.20+esm6
Ubuntu 12.04
o curl - 7.22.0-3ubuntu4.29
o libcurl3 - 7.22.0-3ubuntu4.29
o libcurl3-gnutls - 7.22.0-3ubuntu4.29
o libcurl3-nss - 7.22.0-3ubuntu4.29
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-8285
o CVE-2020-8284
Related notices
o USN-4665-1 : libcurl4, libcurl3-gnutls, curl, libcurl3-nss, libcurl3
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=buMz
-----END PGP SIGNATURE-----