[Security] Bump puma from 3.12.0 to 3.12.6

Bumps puma from 3.12.0 to 3.12.6. This update includes security fixes.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

HTTP Response Splitting vulnerability in puma If an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting.

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

Patched versions: ~> 3.12.4; >= 4.3.3 Unaffected versions: none

Sourced from The Ruby Advisory Database.

HTTP Response Splitting (Early Hints) in Puma

Impact

If an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

This is related to CVE-2020-5247, which fixed this vulnerability but only for regular responses.

Patches

This has been fixed in 4.3.3 and 3.12.4.

Workarounds

Users can not allow untrusted/user input in the Early Hints response header.

Patched versions: ~> 3.12.4; >= 4.3.3 Unaffected versions: none

Sourced from The Ruby Advisory Database.

HTTP Smuggling via Transfer-Encoding Header in Puma

Impact

This is a similar but different vulnerability to the one patched in 3.12.5 and 4.3.4.

A client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client.

If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client.

Patches

The problem has been fixed in Puma 3.12.6 and Puma 4.3.5.

Patched versions: ~> 3.12.6; >= 4.3.5 Unaffected versions: none

Sourced from The Ruby Advisory Database.

HTTP Smuggling via Transfer-Encoding Header in Puma

Impact

By using an invalid transfer-encoding header, an attacker could smuggle an HTTP response.

Patches

The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

Patched versions: ~> 3.12.5; >= 4.3.4 Unaffected versions: none

Sourced from The GitHub Security Advisory Database.

HTTP Smuggling via Transfer-Encoding Header in Puma

Impact

By using an invalid transfer-encoding header, an attacker could smuggle an HTTP response.

Originally reported by @ZeddYu, who has our thanks for the detailed report.

Patches

The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

For more information

If you have any questions or comments about this advisory:

Open an issue in Puma

See our security policy

Affected versions: < 3.12.5

Sourced from The GitHub Security Advisory Database.

HTTP Smuggling via Transfer-Encoding Header in Puma

Impact

This is a similar but different vulnerability to the one patched in 3.12.5 and 4.3.4.

A client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client.

If the proxy uses persistent connections and the client adds another request in via HTTP pipelining, the proxy may mistake it as the first request's body. Puma, however, would see it as two requests, and when processing the second request, send back a response that the proxy does not expect. If the proxy has reused the persistent connection to Puma to send another request for a different client, the second response from the first client will be sent to the second client.

Patches

The problem has been fixed in Puma 3.12.6 and Puma 4.3.5.

For more information

If you have any questions or comments about this advisory:

Open an issue in Puma

See our security policy

Affected versions: < 3.12.6

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects puma

Impact

If an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

This is related to CVE-2020-5247, which fixed this vulnerability but only for regular responses.

Patches

This has been fixed in 4.3.3 and 3.12.4.

Workarounds

Users can not allow untrusted/user input in the Early Hints response header.

For more information

If you have any questions or comments about this advisory:

Open an issue in puma

Email us a project maintainer. Email addresses are listed in our Code of Conduct.

Affected versions: < 3.12.4

Sourced from The Ruby Advisory Database.

HTTP Response Splitting vulnerability in puma If an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting.

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

Patched versions: ~> 3.12.4; >= 4.3.3 Unaffected versions: none

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects puma In Puma (RubyGem) before 4.3.2 and 3.12.2, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. CR, LF or/r, /n) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting.

While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS).

This is related to CVE-2019-16254, which fixed this vulnerability for the WEBrick Ruby web server.

This has been fixed in versions 4.3.2 and 3.12.3 by checking all headers for line endings and rejecting headers with those characters.

Affected versions: < 3.12.3

Sourced from The Ruby Advisory Database.

Keepalive thread overload/DoS in puma A poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack.

If more keepalive connections to Puma are opened than there are threads available, additional connections will wait permanently if the attacker sends requests frequently enough.

Patched versions: ~> 3.12.2; >= 4.3.1 Unaffected versions: none

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects puma

Keepalive thread overload/DoS

Impact

A poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack.

If more keepalive connections to Puma are opened than there are threads available, additional connections will wait permanently if the attacker sends requests frequently enough.

Patches

This vulnerability is patched in Puma 4.3.1 and 3.12.2.

Workarounds

Reverse proxies in front of Puma could be configured to always allow less than X keepalive connections to a Puma cluster or process, where X is the number of threads configured in Puma's thread pool.

For more information

If you have any questions or comments about this advisory:
... (truncated)
Affected versions: < 3.12.2

Release notes

Sourced from puma's releases.

v3.12.1

Changelog

Sourced from puma's changelog.

4.3.4/4.3.5 and 3.12.5/3.12.6 / 2020-05-22

Each patchlevel release contains a separate security fix. We recommend simply upgrading to 4.3.5/3.12.6.

Security

Fix: Fixed two separate HTTP smuggling vulnerabilities that used the Transfer-Encoding header. CVE-2020-11076 and CVE-2020-11077.

4.3.3 and 3.12.4 / 2020-02-28

Bugfixes

Fix: Fixes a problem where we weren't splitting headers correctly on newlines (#2132)

Security

Fix: Prevent HTTP Response splitting via CR in early hints. CVE-2020-5249.

4.3.2 and 3.12.3 / 2020-02-27 (YANKED)

Security

Fix: Prevent HTTP Response splitting via CR/LF in header values. CVE-2020-5247.

4.3.1 and 3.12.2 / 2019-12-05

Security

Fix: a poorly-behaved client could use keepalive requests to monopolize Puma's reactor and create a denial of service attack. CVE-2019-16770.

4.3.0 / 2019-11-07

Features

Strip whitespace at end of HTTP headers (#2010)

Optimize HTTP parser for JRuby (#2012)

Add SSL support for the control app and cli (#2046, #2052)

Bugfixes

Fix Errno::EINVAL when SSL is enabled and browser rejects cert (#1564)

Fix pumactl defaulting puma to development if an environment was not specified (#2035)

Fix closing file stream when reading pid from pidfile (#2048)

Fix a typo in configuration option --extra_runtime_dependencies (#2050)

4.2.1 / 2019-10-07

3 bugfixes

Fix socket activation of systemd (pre-existing) unix binder files (#1842, #1988)

Deal with multiple calls to bind correctly (#1986, #1994, #2006)

Accepts symbols for verify_mode (#1222)

4.2.0 / 2019-09-23

6 features

Pumactl has a new -e environment option and reads config/puma/<environment>.rb config files (#1885)

Semicolons are now allowed in URL paths (MRI only), useful for Angular or Redmine (#1934)

Allow extra dependencies to be defined when using prune_bundler (#1105)

... (truncated)

Commits

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indentlabs / dactyl

[Security] Bump puma from 3.12.0 to 3.12.6 #85

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Keepalive thread overload/DoS

Impact

Patches

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For more information

4.3.4/4.3.5 and 3.12.5/3.12.6 / 2020-05-22

4.3.3 and 3.12.4 / 2020-02-28

4.3.2 and 3.12.3 / 2020-02-27 (YANKED)

4.3.1 and 3.12.2 / 2019-12-05

4.3.0 / 2019-11-07

4.2.1 / 2019-10-07

4.2.0 / 2019-09-23