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Github Security Blog
Github Security Blog
added 2026/05/04 10:3 p.m.2 views

net-imap vulnerable to denial of service via high iteration count for `SCRAM-*` authentication

Summary When authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. Details A hostile IMAP server can send an arbitrarily large PBKDF2 iteration count in the...

6.5CVSS5.8AI score0.00046EPSS
Exploits0References11Affected Software1
Tenable Nessus
Tenable Nessus
added 2026/05/04 12:0 a.m.1 views

RHCOS 6 : ruby193-ruby, rubygem-json and rubygem-rdoc (RHSA-2013:0701)

The remote Red Hat Enterprise Linux CoreOS 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2013:0701 advisory. - rubygem-rdoc: Cross-site scripting in the documentation created by Darkfish Rdoc HTML generator / template CVE-2013-0256 -...

7.5CVSS5.9AI score0.17317EPSS
Exploits0References7
Tenable Nessus
Tenable Nessus
added 2026/05/04 12:0 a.m.1 views

RHCOS 6 : rubygem (RHSA-2013:0728)

The remote Red Hat Enterprise Linux CoreOS 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2013:0728 advisory. - rubygem-rdoc: Cross-site scripting in the documentation created by Darkfish Rdoc HTML generator / template CVE-2013-0256 Note that Nessus h...

4.3CVSS7.3AI score0.02671EPSS
Exploits0References5
RubySec
RubySec
added 2026/05/04 12:0 a.m.6 views

net-imap vulnerable to denial of service via high iteration count for `SCRAM-*` authentication

Summary When authenticating a connection with SCRAM-SHA1 or SCRAM-SHA256, a hostile server can perform a computational denial-of-service attack on the client process by sending a big iteration count value. Details A hostile IMAP server can send an arbitrarily large PBKDF2 iteration count in the...

6.5CVSS5.8AI score0.00046EPSS
Exploits0References1Affected Software1
Tenable Nessus
Tenable Nessus
added 2026/05/04 12:0 a.m.0 views

RHCOS 1 : ruby193-ruby (RHSA-2013:1137)

The remote Red Hat Enterprise Linux CoreOS 1 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2013:1137 advisory. - ruby: hostname check bypassing vulnerability in SSL client CVE-2013-4073 Note that Nessus has not tested for this issue but has instead...

6.8CVSS5.8AI score0.02834EPSS
Exploits0References6
Positive Technologies
Positive Technologies
added 2026/05/04 12:0 a.m.4 views

PT-2026-36987

Name of the Vulnerable Software and Affected Versions net-imap affected versions not specified Description A hostile IMAP server can trigger a computational denial-of-service attack on the client process during authentication using SCRAM-SHA1 or SCRAM-SHA256. By sending an arbitrarily large PBKDF...

6CVSS6AI score0.00046EPSS
Exploits0References15
Tenable Nessus
Tenable Nessus
added 2026/05/04 12:0 a.m.6 views

RHCOS 6 : Ruby on Rails (RHSA-2013:0153)

The remote Red Hat Enterprise Linux CoreOS 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2013:0153 advisory. - rubygem-activesupport: Multiple vulnerabilities in parameter parsing in ActionPack CVE-2013-0156 Note that Nessus has not tested for this...

7.5CVSS7.5AI score0.91907EPSS
Exploits21References6
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.1 views

Astra Linux - уязвимость в ruby2.5

REXML is an XML toolkit for Ruby. The REXML gem prior to version 3.3.9 has a ReDoS vulnerability when it parses an XML document containing many digits between “&” and “x…” in a hexadecimal character reference &x…. This issue does not occur in Ruby 3.2 or later versions. Ruby 3.1 is the only...

8.7CVSS6.7AI score0.01645EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.3 views

Astra Linux - уязвимость в ruby-rack

Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforced its paramslimit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters...

7.5CVSS6.1AI score0.0014EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.2 views

Astra Linux - уязвимость в ruby-websocket-extensions

The websocket-extensions Ruby module before version 0.1.5 allowed Denial of Service DoS attacks through Regex backtracking. The extension parser could take quadratic time when parsing a header containing an unclosed string parameter value whose content was a repeated two-byte sequence of a...

7.5CVSS7.1AI score0.02622EPSS
Exploits1References1
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.3 views

Astra Linux - уязвимость в ruby2.5

In RDoc 3.11 through 6.x, as distributed with Ruby up to 3.0.1, it was possible to execute arbitrary code using | and tags within a filename...

7CVSS7.1AI score0.00351EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.3 views

Astra Linux - уязвимость в ruby2.5

In the CGI gem before version 0.4.2 for Ruby, there is a Regular Expression Denial of Service ReDoS vulnerability in the UtilescapeElement method...

7.5CVSS6.6AI score0.00246EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.4 views

Astra Linux - уязвимость в ruby2.5

A issue was discovered in RDoc versions 6.3.3 through 6.6.2, as distributed in Ruby 3.x through 3.3.0. When parsing .rdocoptions used for configuration in RDoc as a YAML file, object injection and resulting remote code execution are possible because there are no restrictions on the classes that c...

4.5CVSS7.4AI score0.02433EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.5 views

Astra Linux - уязвимость в ruby2.5

There is a buffer over-read issue in Ruby before version 2.6.10, 2.7.x before 2.7.6, 3.x before 3.0.4, and 3.1.x before 3.1.2. This issue occurs during the conversion from strings to floats, including in methods like KernelFloat and Stringtof...

7.5CVSS6.9AI score0.00306EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.3 views

Astra Linux - уязвимость в ruby-sinatra

In versions of Sinatra before 2.2.0, it does not validate that the expanded path matches publicdir when serving static files...

7.5CVSS6.7AI score0.00601EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.5 views

Astra Linux - уязвимость в ruby-rails-html-sanitizer

Rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Prior to version 1.4.4, there was a potential XSS vulnerability with certain configurations of Rails::Html::Sanitizer, due to an incomplete fix of CVE-2022-32209. Rails::Html::Sanitizer might allow an attacke...

6.1CVSS6.7AI score0.00363EPSS
Exploits1References1
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.3 views

Astra Linux - уязвимость в puma

Puma is a simple, fast, multi-threaded, parallel HTTP 1.1 server for Ruby/Rack applications. When using Puma behind a proxy that does not properly validate that the incoming HTTP requests comply with the RFC7230 standard, Puma and the frontend proxy may disagree about where the requests start and...

9.1CVSS6.6AI score0.00417EPSS
Exploits0References1
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.2 views

Astra Linux - уязвимость в ruby2.5

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.1 has some DoS vulnerabilities when it parses an XML that has many specific characters such as . If you need to parse untrusted XMLs, you many be impacted to these vulnerabilities. The REXML gem 3.3.2 or later include the patches to fix...

4.3CVSS6.5AI score0.07595EPSS
Exploits0References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.2 views

Astra Linux - уязвимость в ruby2.5

Date.parse in the date gem through 3.2.0 for Ruby allows ReDoS regular expression Denial of Service via a long string. The fixed versions are 3.2.1, 3.1.2, 3.0.2, and 2.0.1...

7.5CVSS7AI score0.00495EPSS
Exploits1References2
AstraLinux
AstraLinux
added 2026/05/03 11:59 p.m.2 views

Astra Linux - уязвимость в ruby-rack

A security vulnerability exists in versions of Rack 2.2.3 and Rack 2.1.4, where reliance on cookies without validation/integrity checks allows an attacker to forge a secure or host-only cookie prefix...

7.5CVSS6.6AI score0.00811EPSS
Exploits1References2
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