generated from sig_core/wiki-template
927 lines
29 KiB
HTML
927 lines
29 KiB
HTML
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<meta name="description" content="The wiki for the Rocky Linux Security Special Interest Group">
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<link rel="canonical" href="https://sig-security.rocky.page/packages/control/">
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<link rel="prev" href="../../issues/CVE-2023-4911/">
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<meta name="generator" content="mkdocs-1.5.3, mkdocs-material-9.5.14">
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<title>Extra package: control - SIG/Security Wiki</title>
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SIG/Security Wiki
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Extra package: control
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.5.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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security/wiki
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><!--! Font Awesome Free 6.5.1 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M439.55 236.05 244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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security/wiki
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SIG/Security Wiki
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</a>
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News
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<li class="md-nav__item md-nav__item--section md-nav__item--nested">
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Issues
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Issues
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<a href="../../issues/CVE-2023-23583/" class="md-nav__link">
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<span class="md-ellipsis">
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CVE-2023-23583: microcode_ctl
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</span>
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</a>
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<li class="md-nav__item">
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<a href="../../issues/CVE-2023-4911/" class="md-nav__link">
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<span class="md-ellipsis">
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CVE-2023-4911: glibc
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</span>
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</a>
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<li class="md-nav__item md-nav__item--active md-nav__item--section md-nav__item--nested">
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Packages
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Packages
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Extra package: control
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M10 20H6V4h7v5h5v3.1l2-2V8l-6-6H6c-1.1 0-2 .9-2 2v16c0 1.1.9 2 2 2h4v-2m10.2-7c.1 0 .3.1.4.2l1.3 1.3c.2.2.2.6 0 .8l-1 1-2.1-2.1 1-1c.1-.1.2-.2.4-.2m0 3.9L14.1 23H12v-2.1l6.1-6.1 2.1 2.1Z"/></svg>
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<h1 id="extra-package-control">Extra package: control<a class="headerlink" href="#extra-package-control" title="Permanent link">¶</a></h1>
|
|
<h2 id="el9">EL9<a class="headerlink" href="#el9" title="Permanent link">¶</a></h2>
|
|
<ul>
|
|
<li>Version <code>0.8.0-7.el9_3.security</code></li>
|
|
</ul>
|
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<h3 id="package-summary">Package summary<a class="headerlink" href="#package-summary" title="Permanent link">¶</a></h3>
|
|
<p><code>control</code> provides a common interface to register and control (what it calls) system facilities.
|
|
This is intended primarily for facilities that can potentially be dangerous to system security, to let you enable, disable, or configure each facility.
|
|
A typical facility is a configuration setting of a service or a SUID/SGID/setcap program, or a closely related group of such settings and/or programs that are managed together.
|
|
We manage permissions on SUID/SGID/setcap programs because those programs pose risk to system security in case of vulnerabilities in them or in library code they use.</p>
|
|
<p><code>control</code> originates in Owl and is actively maintained in ALT Linux.</p>
|
|
<h3 id="usage-in-rocky-linux">Usage in Rocky Linux<a class="headerlink" href="#usage-in-rocky-linux" title="Permanent link">¶</a></h3>
|
|
<p>While the original <code>control</code> package in Owl and ALT Linux merely provides the common interface mentioned above for other packages to register their facilities with (and many packages in those distros do), it's been adapted in Rocky Linux to provide its own sub-packages with facility specifications and RPM trigger scripts for other packages coming from EL. This way, we can <code>control</code> those facilities and have custom settings persist (be automatically saved and restored) over package upgrades without us having to maintain forks of those other packages.</p>
|
|
<p>The available facilities, their current settings, and lists of possible settings can be queried by running the <code>control</code> command without parameters. With all currently available sub-packages installed and upstream default settings, its output is:</p>
|
|
<div class="highlight"><pre><span></span><code>chage public (public restricted)
|
|
gpasswd public (public wheelonly restricted)
|
|
mount public (public wheelonly unprivileged restricted)
|
|
newgidmap public (public wheelonly restricted)
|
|
newgrp public (public wheelonly restricted)
|
|
newuidmap public (public wheelonly restricted)
|
|
pam_timestamp_check public (public restricted)
|
|
password-hash sha512crypt (sha512crypt yescrypt)
|
|
password-policy pwquality (pwquality passwdqc)
|
|
unix_chkpwd public (public restricted)
|
|
write public (public restricted)
|
|
</code></pre></div>
|
|
<p>With maximum security hardening, it changes to:</p>
|
|
<div class="highlight"><pre><span></span><code>chage restricted (public restricted)
|
|
gpasswd restricted (public wheelonly restricted)
|
|
mount restricted (public wheelonly unprivileged restricted)
|
|
newgidmap restricted (public wheelonly restricted)
|
|
newgrp restricted (public wheelonly restricted)
|
|
newuidmap restricted (public wheelonly restricted)
|
|
pam_timestamp_check restricted (public restricted)
|
|
password-hash yescrypt (sha512crypt yescrypt)
|
|
password-policy passwdqc (pwquality passwdqc)
|
|
unix_chkpwd restricted (public restricted)
|
|
write restricted (public restricted)
|
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</code></pre></div>
|
|
<p>Please refer to <code>control(8)</code> man page for command-line usage syntax.</p>
|
|
<h3 id="sub-packages">Sub-packages<a class="headerlink" href="#sub-packages" title="Permanent link">¶</a></h3>
|
|
<p>Currently, there are 4 sub-packages:</p>
|
|
<h4 id="control">control<a class="headerlink" href="#control" title="Permanent link">¶</a></h4>
|
|
<p>The main package providing the common interface, but no facilities of its own.</p>
|
|
<h4 id="control-shadow-utils">control-shadow-utils<a class="headerlink" href="#control-shadow-utils" title="Permanent link">¶</a></h4>
|
|
<p>Facility specifications corresponding to the <code>shadow-utils</code> package. Currently, these allow to <code>control</code> access to 5 privileged programs - 3 of them (<code>chage</code>, <code>gpasswd</code>, and <code>newgrp</code>) are by default SUID root and 2 (<code>newuidmap</code> and <code>newgidmap</code>) are <code>cap_setuid=ep</code>.</p>
|
|
<h4 id="control-util-linux">control-util-linux<a class="headerlink" href="#control-util-linux" title="Permanent link">¶</a></h4>
|
|
<p>Facility specifications corresponding to the <code>util-linux</code> and <code>util-linux-core</code> packages. Currently, these allow to <code>control</code> access to 3 privileged programs - 2 of them (<code>mount</code> and <code>umount</code>) are by default SUID root and 1 (<code>write</code>) SGID <code>tty</code>.</p>
|
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<h4 id="control-pam">control-pam<a class="headerlink" href="#control-pam" title="Permanent link">¶</a></h4>
|
|
<p>Facility specifications corresponding to the <code>pam</code> package. Currently, these allow to <code>control</code> user password hashing scheme and password policy in use by PAM-aware programs, as well as two SUID root PAM helper programs <code>unix_chkpwd</code> and <code>pam_timestamp_check</code>.</p>
|
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<h3 id="change-log">Change log<a class="headerlink" href="#change-log" title="Permanent link">¶</a></h3>
|
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<div class="highlight"><pre><span></span><code>* Wed Jan 3 2024 Solar Designer <solar@openwall.com> 0.8.0-7
|
|
- Add unix_chkpwd and pam_timestamp_check facilities to the pam sub-package
|
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|
|
* Wed Jan 3 2024 Solar Designer <solar@openwall.com> 0.8.0-6
|
|
- Revise password-hash and password-policy to process the underlying two
|
|
"sub-facilities" (for the two configuration files updated by each of these)
|
|
using the same logic that we had used for mount (where the two underlying
|
|
"sub-facilities" are the mount and umount programs)
|
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|
|
* Wed Dec 27 2023 Solar Designer <solar@openwall.com> 0.8.0-5
|
|
- Install control(8) mode 755 since some of its features work as non-root
|
|
- Add sub-package with facilities and triggers for pam password hashing and
|
|
password policy
|
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|
|
* Mon Dec 18 2023 Solar Designer <solar@openwall.com> 0.8.0-4
|
|
- Add sub-package with facilities and triggers for util-linux
|
|
|
|
* Mon Dec 18 2023 Solar Designer <solar@openwall.com> 0.8.0-3
|
|
- Rename the shadow sub-package to shadow-utils
|
|
- Rename the source files not to differentiate them by sub-package
|
|
- Add "Requires: shadow-utils" in the shadow-utils sub-package
|
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|
|
* Wed Dec 13 2023 Solar Designer <solar@openwall.com> 0.8.0-2
|
|
- In addition to Requires(pre), also use Requires in the sub-package
|
|
- In %triggerprein_control, pre-check that the facility exists
|
|
- Use (renamed) copies of the trigger macros within this spec file
|
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|
|
* Wed Dec 13 2023 Solar Designer <solar@openwall.com> 0.8.0-1
|
|
- Add macros for use in RPM triggers
|
|
- Add sub-package with facilities and triggers for shadow-utils
|
|
|
|
* Wed Dec 6 2023 Solar Designer <solar@openwall.com> 0.8.0-0
|
|
- Initial packaging for EL based on ALT Linux and Owl packages
|
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</code></pre></div>
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