squid, squid3 vulnerabilities

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

* Ubuntu 19.10
* Ubuntu 19.04
* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

* squid - Web proxy cache server
* squid3 - Web proxy cache server

Details

Jeriko One and Kristoffer Danielsson discovered that Squid
incorrectly handled certain URN requests. A remote attacker could
possibly use this issue to bypass access checks and access
restricted servers. This issue was only addressed in Ubuntu 19.04
and Ubuntu 19.10. (CVE-2019-12523)

Jeriko One discovered that Squid incorrectly handed URN responses.
A remote attacker could use this issue to cause Squid to crash,
resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2019-12526)

Alex Rousskov discovered that Squid incorrectly handled certain
strings. A remote attacker could possibly use this issue to cause
Squid to crash, resulting in a denial of service. This issue only
affected Ubuntu 19.04. (CVE-2019-12854)

Jeriko One and Kristoffer Danielsson discovered that Squid
incorrectly handled certain input. A remote attacker could use
this issue to cause Squid to crash, resulting in a denial of
service, or possibly execute arbitrary code. This issue was only
addressed in Ubuntu 19.04 and Ubuntu 19.10. (CVE-2019-18676)

Kristoffer Danielsson discovered that Squid incorrectly handled
certain messages. This issue could result in traffic being
redirected to origins it should not be delivered to.
(CVE-2019-18677)

R**gis Leroy discovered that Squid incorrectly handled certain
HTTP request headers. A remote attacker could use this to smuggle
HTTP requests and corrupt caches with arbitrary content.
(CVE-2019-18678)

David Fifield discovered that Squid incorrectly handled HTTP
Digest Authentication. A remote attacker could possibly use this
issue to obtain pointer contents and bypass ASLR protections.
(CVE-2019-18679)

Update instructions

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

Ubuntu 19.10
squid - 4.8-1ubuntu2.1

Ubuntu 19.04
squid - 4.4-1ubuntu2.3

Ubuntu 18.04 LTS
squid3 - 3.5.27-1ubuntu1.4

Ubuntu 16.04 LTS
squid3 - 3.5.12-1ubuntu7.9

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2019-12523
* CVE-2019-12526
* CVE-2019-12854
* CVE-2019-18676
* CVE-2019-18677
* CVE-2019-18678
* CVE-2019-18679

--- Mystic BBS v1.12 A43 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)

squid, squid3 vulnerabilities

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

* Ubuntu 19.10
* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

* squid - Web proxy cache server
* squid3 - Web proxy cache server

Details

Jeriko One discovered that Squid incorrectly handled memory when
connected to an FTP server. A remote attacker could possibly use
this issue to obtain sensitive information from Squid memory.
(CVE-2019-12528)

Regis Leroy discovered that Squid incorrectly handled certain HTTP
requests. A remote attacker could possibly use this issue to
access server resources prohibited by earlier security filters.
(CVE-2020-8449)

Guido Vranken discovered that Squid incorrectly handled certain
buffer operations when acting as a reverse proxy. A remote
attacker could use this issue to cause Squid to crash, resulting
in a denial of service, or possibly execute arbitrary code.
(CVE-2020-8450)

Aaron Costello discovered that Squid incorrectly handled certain
NTLM authentication credentials. A remote attacker could possibly
use this issue to cause Squid to crash, resulting in a denial of
service. (CVE-2020-8517)

Update instructions

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

Ubuntu 19.10
squid - 4.8-1ubuntu2.2

Ubuntu 18.04 LTS
squid - 3.5.27-1ubuntu1.5

Ubuntu 16.04 LTS
squid - 3.5.12-1ubuntu7.10

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2019-12528
* CVE-2020-8449
* CVE-2020-8450
* CVE-2020-8517

--- Mystic BBS v1.12 A44 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)

squid3 vulnerabilities

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

* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

* squid3 - Web proxy cache server

Details

Jeriko One discovered that Squid incorrectly handled caching
certain requests. A remote attacker could possibly use this issue
to perform cache-injection attacks or gain access to reverse proxy
features such as ESI. (CVE-2019-12520)

Jeriko One and Kristoffer Danielsson discovered that Squid
incorrectly handled certain URN requests. A remote attacker could
possibly use this issue to bypass access checks. (CVE-2019-12523)

Jeriko One discovered that Squid incorrectly handled URL decoding.
A remote attacker could possibly use this issue to bypass certain
rule checks. (CVE-2019-12524)

Jeriko One and Kristoffer Danielsson discovered that Squid
incorrectly handled input validation. A remote attacker could use
this issue to cause Squid to crash, resulting in a denial of
service. (CVE-2019-18676)

Update instructions

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

Ubuntu 18.04 LTS
squid - 3.5.27-1ubuntu1.7

Ubuntu 16.04 LTS
squid - 3.5.12-1ubuntu7.12

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2019-12520
* CVE-2019-12523
* CVE-2019-12524
* CVE-2019-18676

--- Mystic BBS v1.12 A45 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)

squid vulnerabilities

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

* Ubuntu 20.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

* squid - Web proxy cache server

Details

Amit Klein discovered that Squid incorrectly validated certain
data. A remote attacker could possibly use this issue to perform
an HTTP request smuggling attack, resulting in cache poisoning.
(CVE-2020-15810)

R**gis Leroy discovered that Squid incorrectly validated certain
data. A remote attacker could possibly use this issue to perform
an HTTP request splitting attack, resulting in cache poisoning.
(CVE-2020-15811)

Lubos Uhliarik discovered that Squid incorrectly handled certain
Cache Digest response messages sent by trusted peers. A remote
attacker could possibly use this issue to cause Squid to consume
resources, resulting in a denial of service. (CVE-2020-24606)

Update instructions

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

Ubuntu 20.04 LTS
squid - 4.10-1ubuntu1.2

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2020-15810
* CVE-2020-15811
* CVE-2020-24606

--- Mystic BBS v1.12 A45 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)

squid3 vulnerabilities

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

* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Several security issues were fixed in Squid.

Software Description

* squid3 - Web proxy cache server

Details

Alex Rousskov and Amit Klein discovered that Squid incorrectly
handled certain Content-Length headers. A remote attacker could
possibly use this issue to perform an HTTP request smuggling
attack, resulting in cache poisoning. (CVE-2020-15049)

Amit Klein discovered that Squid incorrectly validated certain
data. A remote attacker could possibly use this issue to perform
an HTTP request smuggling attack, resulting in cache poisoning.
(CVE-2020-15810)

R**gis Leroy discovered that Squid incorrectly validated certain
data. A remote attacker could possibly use this issue to perform
an HTTP request splitting attack, resulting in cache poisoning.
(CVE-2020-15811)

Lubos Uhliarik discovered that Squid incorrectly handled certain
Cache Digest response messages sent by trusted peers. A remote
attacker could possibly use this issue to cause Squid to consume
resources, resulting in a denial of service. (CVE-2020-24606)

Update instructions

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

Ubuntu 18.04 LTS
squid - 3.5.27-1ubuntu1.9

Ubuntu 16.04 LTS
squid - 3.5.12-1ubuntu7.15

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

* CVE-2020-15049
* CVE-2020-15810
* CVE-2020-15811
* CVE-2020-24606

--- Mystic BBS v1.12 A46 (Linux/64)
* Origin: BZ&BZ BBS (21:4/110)