CVE-2023-4809
Apache pf IPv6 Fragment Header Reassembly Vulnerability - Double Processing
Description
In pf packet processing with a 'scrub fragment reassemble' rule, a packet containing multiple IPv6 fragment headers would be reassembled, and then immediately processed. That is, a packet with multiple fragment extension headers would not be recognized as the correct ultimate payload. Instead a packet with multiple IPv6 fragment headers would unexpectedly be interpreted as a fragmented packet, rather than as whatever the real payload is. As a result, IPv6 fragments may bypass pf firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.
INFO
Published Date :
Sept. 6, 2023, 8:15 p.m.
Last Modified :
Dec. 21, 2023, 10:15 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
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-2023-4809.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2023/09/08/5 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2023/09/08/6 | Mailing List Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2023/09/08/7 | Mailing List Third Party Advisory |
| https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc | Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20231221-0009/ |
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-2023-4809 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-4809 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 -
CVE Modified by [email protected]
Dec. 21, 2023
Action Type Old Value New Value Added Reference FreeBSD https://security.netapp.com/advisory/ntap-20231221-0009/ [No types assigned] -
Initial Analysis by [email protected]
Sep. 12, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type http://www.openwall.com/lists/oss-security/2023/09/08/5 No Types Assigned http://www.openwall.com/lists/oss-security/2023/09/08/5 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/09/08/6 No Types Assigned http://www.openwall.com/lists/oss-security/2023/09/08/6 Mailing List, Third Party Advisory Changed Reference Type http://www.openwall.com/lists/oss-security/2023/09/08/7 No Types Assigned http://www.openwall.com/lists/oss-security/2023/09/08/7 Mailing List, Third Party Advisory Changed Reference Type https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc No Types Assigned https://security.FreeBSD.org/advisories/FreeBSD-SA-23:10.pf.asc Vendor Advisory Added CWE NIST NVD-CWE-Other Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions up to (excluding) 12.4 *cpe:2.3:o:freebsd:freebsd:12.4:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:p4:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:rc2-p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:12.4:rc2-p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* versions from (including) 13.0 up to (excluding) 13.2 *cpe:2.3:o:freebsd:freebsd:13.2:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:13.2:p2:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 09, 2023
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2023/09/08/6 [No Types Assigned] Added Reference http://www.openwall.com/lists/oss-security/2023/09/08/7 [No Types Assigned] -
CVE Modified by [email protected]
Sep. 08, 2023
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2023/09/08/5 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-4809 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-2023-4809
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.08 }} 0.02%
score
0.34803
percentile