<html>
<head>
<base href="https://bugzilla.rosalinux.ru/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Platform</th>
<td>2021.1
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_CONFIRMED "
title="CONFIRMED - [CVE 21] grub2 2.06 CVEs found"
href="https://bugzilla.rosalinux.ru/show_bug.cgi?id=13528">13528</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CVE 21] grub2 2.06 CVEs found
</td>
</tr>
<tr>
<th>Classification</th>
<td>ROSA-based products
</td>
</tr>
<tr>
<th>Product</th>
<td>ROSA Fresh
</td>
</tr>
<tr>
<th>Version</th>
<td>All
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>URL</th>
<td>CVE-2022-28733, CVE-2022-28734, CVE-2022-28735, CVE-2022-28736,
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>CONFIRMED
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>Normal
</td>
</tr>
<tr>
<th>Component</th>
<td>System (kernel, glibc, systemd, bash, PAM...)
</td>
</tr>
<tr>
<th>Assignee</th>
<td>bugs@lists.rosalinux.ru
</td>
</tr>
<tr>
<th>Reporter</th>
<td>y.tumanov@rosalinux.ru
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>bugs@lists.rosalinux.ru
</td>
</tr>
<tr>
<th>CC</th>
<td>e.kosachev@rosalinux.ru, s.matveev@rosalinux.ru, y.tumanov@rosalinux.ru
</td>
</tr>
<tr>
<th>Target Milestone</th>
<td>---
</td>
</tr>
<tr>
<th>Flags</th>
<td>secteam_verified?
</td>
</tr></table>
<p>
<div>
<pre>Please patch CVEs for package grub2 version 2.06
INFO (CVEs are): grub2 2.06
cves found
CVE-2022-28733
Desc: Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP
packet can lead to an integer underflow in grub_net_recv_ip4_packets() function
on rsm->total_len value. Under certain circumstances the total_len value may
end up wrapping around to a small integer number which will be used in memory
allocation. If the attack succeeds in such way, subsequent operations can write
past the end of the buffer.
Link: <a href="https://nvd.nist.gov/vuln/detail/CVE-2022-28733">https://nvd.nist.gov/vuln/detail/CVE-2022-28733</a>
Severity: HIGH
CVE-2022-28734
Desc: Out-of-bounds write when handling split HTTP headers; When handling split
HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point
by one position. This can lead to a out-of-bound write further when parsing the
HTTP request, writing a NULL byte past the buffer. It's conceivable that an
attacker controlled set of packets can lead to corruption of the GRUB2's
internal memory metadata.
Link: <a href="https://nvd.nist.gov/vuln/detail/CVE-2022-28734">https://nvd.nist.gov/vuln/detail/CVE-2022-28734</a>
Severity: CRITICAL
CVE-2022-28735
Desc: The GRUB2's shim_lock verifier allows non-kernel files to be loaded on
shim-powered secure boot systems. Allowing such files to be loaded may lead to
unverified code and modules to be loaded in GRUB2 breaking the secure boot
trust-chain.
Link: <a href="https://nvd.nist.gov/vuln/detail/CVE-2022-28735">https://nvd.nist.gov/vuln/detail/CVE-2022-28735</a>
Severity: HIGH
CVE-2022-28736
Desc: There's a use-after-free vulnerability in grub_cmd_chainloader()
function; The chainloader command is used to boot up operating systems that
doesn't support multiboot and do not have direct support from GRUB2. When
executing chainloader more than once a use-after-free vulnerability is
triggered. If an attacker can control the GRUB2's memory allocation pattern
sensitive data may be exposed and arbitrary code execution can be achieved.
Link: <a href="https://nvd.nist.gov/vuln/detail/CVE-2022-28736">https://nvd.nist.gov/vuln/detail/CVE-2022-28736</a>
Severity: HIGH</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>