CVE-2021-39240
"HAPROXY HTTP URI Scheme Path Validation Bypass"
Description
An issue was discovered in HAProxy 2.2 before 2.2.16, 2.3 before 2.3.13, and 2.4 before 2.4.3. It does not ensure that the scheme and path portions of a URI have the expected characters. For example, the authority field (as observed on a target HTTP/2 server) might differ from what the routing rules were intended to achieve.
INFO
Published Date :
Aug. 17, 2021, 7:15 p.m.
Last Modified :
Nov. 7, 2023, 3:37 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2021-39240
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.
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-2021-39240.
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-2021-39240 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-39240 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]
Nov. 07, 2023
Action Type Old Value New Value Added Reference MITRE https://www.mail-archive.com/haproxy%40formilux.org/msg41041.html [No types assigned] Added Reference MITRE https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=a495e0d94876c9d39763db319f609351907a31e8 [No types assigned] Added Reference MITRE https://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=4b8852c70d8c4b7e225e24eb58258a15eb54c26e [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/ [No types assigned] Added Reference MITRE https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ [No types assigned] Removed Reference MITRE https://git.haproxy.org/?p=haproxy.git;a=commit;h=a495e0d94876c9d39763db319f609351907a31e8 Removed Reference MITRE https://git.haproxy.org/?p=haproxy.git;a=commit;h=4b8852c70d8c4b7e225e24eb58258a15eb54c26e Removed Reference MITRE https://www.mail-archive.com/[email protected]/msg41041.html Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ Removed Reference MITRE https://lists.fedoraproject.org/archives/list/[email protected]/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/ -
Modified Analysis by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/ Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 27, 2021
Action Type Old Value New Value Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/4ALECUZDIMT5FYGP6V6PVSI4BKVZTZWN/ [No Types Assigned] Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/RPNY4WZIQUAUOCLIMUPC37AQWNXTWIQM/ [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 25, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://git.haproxy.org/?p=haproxy.git;a=commit;h=4b8852c70d8c4b7e225e24eb58258a15eb54c26e No Types Assigned https://git.haproxy.org/?p=haproxy.git;a=commit;h=4b8852c70d8c4b7e225e24eb58258a15eb54c26e Mailing List, Patch, Vendor Advisory Changed Reference Type https://git.haproxy.org/?p=haproxy.git;a=commit;h=a495e0d94876c9d39763db319f609351907a31e8 No Types Assigned https://git.haproxy.org/?p=haproxy.git;a=commit;h=a495e0d94876c9d39763db319f609351907a31e8 Mailing List, Patch, Vendor Advisory Changed Reference Type https://www.debian.org/security/2021/dsa-4960 No Types Assigned https://www.debian.org/security/2021/dsa-4960 Third Party Advisory Changed Reference Type https://www.mail-archive.com/[email protected]/msg41041.html No Types Assigned https://www.mail-archive.com/[email protected]/msg41041.html Third Party Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.2.0 up to (excluding) 2.2.16 *cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.3.0 up to (excluding) 2.3.13 *cpe:2.3:a:haproxy:haproxy:*:*:*:*:*:*:*:* versions from (including) 2.4.0 up to (excluding) 2.4.3 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 18, 2021
Action Type Old Value New Value Added Reference https://www.debian.org/security/2021/dsa-4960 [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-2021-39240 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-2021-39240
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.35 }} 0.03%
score
0.71375
percentile