0.0
NA
CVE-2021-47388
Samsung Enables Free Reallocation with Mac80211
Description

In the Linux kernel, the following vulnerability has been resolved: mac80211: fix use-after-free in CCMP/GCMP RX When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c ("mac80211: check defrag PN against current frame"). Unfortunately, in that commit I used the 'hdr' variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame. Fix this by reloading the variable after the code that results in the reallocations, if any. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.

INFO

Published Date :

May 21, 2024, 3:15 p.m.

Last Modified :

May 21, 2024, 4:54 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

Exploitability Score :

Affected Products

The following products are affected by CVE-2021-47388 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-47388.

URL Resource
https://git.kernel.org/stable/c/27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9
https://git.kernel.org/stable/c/31de381aef0ab1b342f62485118dc8a19363dc78
https://git.kernel.org/stable/c/3d5d629c99c468458022e9b381789de3595bf4dd
https://git.kernel.org/stable/c/447d001b875d0e7f211c4ba004916028da994258
https://git.kernel.org/stable/c/50149e0866a82cef33e680ee68dc380a5bc75d32
https://git.kernel.org/stable/c/57de2dcb18742dc2860861c9f496da7d42b67da0
https://git.kernel.org/stable/c/94513069eb549737bcfc3d988d6ed4da948a2de8
https://git.kernel.org/stable/c/f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-47388 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-47388 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 28, 2024

    Action Type Old Value New Value
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 21, 2024

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: mac80211: fix use-after-free in CCMP/GCMP RX When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c ("mac80211: check defrag PN against current frame"). Unfortunately, in that commit I used the 'hdr' variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame. Fix this by reloading the variable after the code that results in the reallocations, if any. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
    Added Reference kernel.org https://git.kernel.org/stable/c/447d001b875d0e7f211c4ba004916028da994258 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/31de381aef0ab1b342f62485118dc8a19363dc78 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/3d5d629c99c468458022e9b381789de3595bf4dd [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/50149e0866a82cef33e680ee68dc380a5bc75d32 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/57de2dcb18742dc2860861c9f496da7d42b67da0 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/94513069eb549737bcfc3d988d6ed4da948a2de8 [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-47388 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-47388 weaknesses.

NONE - Vulnerability Scoring System
: