CVE-2019-14842
Linux NBD Protocol Stack/Heap Overwrite Vulnerability
Description
Structured reply is a feature of the newstyle NBD protocol allowing the server to send a reply in chunks. A bounds check which was supposed to test for chunk offsets smaller than the beginning of the request did not work because of signed/unsigned confusion. If one of these chunks contains a negative offset then data under control of the server is written to memory before the read buffer supplied by the client. If the read buffer is located on the stack then this allows the stack return address from nbd_pread() to be trivially modified, allowing arbitrary code execution under the control of the server. If the buffer is located on the heap then other memory objects before the buffer can be overwritten, which again would usually lead to arbitrary code execution.
INFO
Published Date :
Nov. 26, 2019, 4:15 p.m.
Last Modified :
Nov. 30, 2022, 9:52 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
5.9
Exploitability Score :
3.9
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-2019-14842.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14842 | Issue Tracking Third Party Advisory |
| https://www.redhat.com/archives/libguestfs/2019-October/msg00060.html | Patch Third Party Advisory |
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-2019-14842 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-14842 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 [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Nov. 30, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Dec. 04, 2020
Action Type Old Value New Value Removed CWE Red Hat, Inc. CWE-20 Added CWE Red Hat, Inc. CWE-681 Removed CWE Reason CWE-20 / More specific CWE option available -
Reanalysis by [email protected]
Oct. 09, 2020
Action Type Old Value New Value Removed CWE NIST CWE-20 Added CWE NIST CWE-681 Changed CPE Configuration OR *cpe:2.3:a:libguestfs:libnbd:-:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:libnbd:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.3 -
Initial Analysis by [email protected]
Dec. 18, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14842 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14842 Issue Tracking, Third Party Advisory Changed Reference Type https://www.redhat.com/archives/libguestfs/2019-October/msg00060.html No Types Assigned https://www.redhat.com/archives/libguestfs/2019-October/msg00060.html Patch, Third Party Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:a:libguestfs:libnbd:-:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-14842 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-2019-14842
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.41 }} 0.06%
score
0.71081
percentile