Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3851 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3851-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Markus Koschany     June 30, 2024                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : gunicorn     Version        : 19.9.0-1+deb10u1     CVE ID         : CVE-2024-1135     Debian Bug     : 1069126

    Gunicorn, an event-based HTTP/WSGI server, fails to properly validate Transfer-     Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By     crafting requests with conflicting Transfer-Encoding headers, attackers can     bypass security restrictions and access restricted endpoints. This issue is due     to Gunicorns handling of Transfer-Encoding headers, where it incorrectly     processes requests with multiple, conflicting Transfer-Encoding headers,     treating them as chunked regardless of the final encoding specified. This     vulnerability allows for a range of attacks including cache poisoning, session     manipulation, and data exposure.

    For Debian 10 buster, this problem has been fixed in version     19.9.0-1+deb10u1.

    We recommend that you upgrade your gunicorn packages.

    For the detailed security status of gunicorn please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/gunicorn

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2024:4054 advisory.

    Gunicorn (Green Unicorn) is a Python WSGI HTTP server for UNIX.

    Security Fix(es):

    * HTTP Request Smuggling due to improper validation of Transfer-Encoding     headers (CVE-2024-1135)

    For more details about the security issue(s), including the impact, a CVSS     score, acknowledgments, and other related information, refer to the CVE     page listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 / 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2024:3781 advisory.

    Red Hat Ansible Automation Platform provides an enterprise framework for building, deploying and managing     IT automation at scale. IT Managers can provide top-down guidelines on how automation is applied to     individual teams, while automation developers retain the freedom to write tasks that leverage existing     knowledge without the overhead. Ansible Automation Platform makes it possible for users across an     organization to share, vet, and manage automation content by means of a simple, powerful, and agentless     language.

    Security Fix(es):

    * automation-controller: aiohttp: DoS when trying to parse malformed POST requests (CVE-2024-30251)
    * automation-controller: Django: Potential regular expression denial-of-service in     django.utils.text.Truncator.words() (CVE-2024-27351)
    * automation-controller: pip: Mercurial configuration injectable in repo revision when installing via pip     (CVE-2023-5752)
    * automation-controller: pydantic: regular expression denial of service via crafted email string     (CVE-2024-3772)
    * automation-hub, python3/python39-galaxy-ng: follow-redirects: Possible credential leak (CVE-2024-28849)
    * python3/python39-aiohttp: DoS when trying to parse malformed POST requests (CVE-2024-30251)
    * python3/python39-aiohttp: XSS on index pages for static file handling (CVE-2024-27306)
    * python3/python39-black: ReDoS via the lines_with_leading_tabs_expanded() function in strings.py file     (CVE-2024-21503)
    * python3/python39-cryptography: NULL pointer dereference with pkcs12.serialize_key_and_certificates when     called with a non-matching certificate and private key and an hmac_hash override (CVE-2024-26130)
    * python3/python39-cryptography: NULL-dereference when loading PKCS7 certificates (CVE-2023-49083)
    * python3/python39-cryptography: NULL-dereference when loading PKCS7 certificates (CVE-2023-49083)
    * python3/python39-gunicorn: HTTP Request Smuggling due to improper validation of Transfer-Encoding     headers (CVE-2024-1135)
    * python3/python39-idna: potential DoS via resource consumption via specially crafted inputs to     idna.encode() (CVE-2024-3651)
    * python3/python39-jinja2: accepts keys containing non-attribute characters (CVE-2024-34064)
    * python3/python39-pillow: buffer overflow in _imagingcms.c (CVE-2024-28219)
    * python3/python39-pillow: Arbitrary Code Execution via the environment parameter (CVE-2023-50447)
    * python3/python39-pydantic: regular expression denial of service via crafted email string (CVE-2024-3772)
    * python3/python39-requests: subsequent requests to the same host ignore cert verification     (CVE-2024-35195)
    * python3/python39-social-auth-app-django: Improper Handling of Case Sensitivity in social-auth-app-django     (CVE-2024-32879)
    * python3/python39-sqlparse: parsing heavily nested list leads to denial of service (CVE-2024-4340)
    * receptor: golang: crypto/x509: Verify panics on certificates with an unknown public key algorithm     (CVE-2024-24783)
    * receptor: golang: net/http, x/net/http2: unlimited number of CONTINUATION frames causes DoS     (CVE-2023-45288)
    * receptor: golang: net/http: memory exhaustion in Request.ParseMultipartForm (CVE-2023-45290)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Updates and fixes for automation controller:
    * Fixed Redis connection leak on version 4.5.6 (AAP-24286)
    * automation-controller has been updated to 4.5.7

    Updates and fixes for automation hub:
    * Fixed repository sync issues (AAH-3111, AAH-3218)
    * automation-hub/python3-galaxy-ng/python39-galaxy-ng have been updated to 4.9.2

    Additional changes:
    * ansible-core has been updated to 2.15.11
    * automation-eda-controller has been updated to 1.0.7
    * installer and setup have been updated to 2.4-7
    * receptor has been updated to 1.4.8

    For more details about the updates and fixes included in this release, refer to the Release Notes.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2024:2727 advisory.

    Gunicorn (Green Unicorn) is a Python WSGI HTTP server for UNIX

    Security Fix(es):

    * HTTP Request Smuggling due to improper validation of Transfer-Encoding     headers (CVE-2024-1135)

    For more details about the security issue(s), including the impact, a CVSS     score, acknowledgments, and other related information, refer to the CVE     page listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2024:1440-1 advisory.

  - Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS)     vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass     security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of     Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-     Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability     allows for a range of attacks including cache poisoning, session manipulation, and data exposure.
    (CVE-2024-1135)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
201172	Debian dla-3851 : gunicorn - security update	Nessus	Debian Local Security Checks	high
200873	RHEL 8 : Red Hat OpenStack Platform 16.2 (python-gunicorn) (RHSA-2024:4054)	Nessus	Red Hat Local Security Checks	high
200272	RHEL 8 / 9 : Red Hat Ansible Automation Platform 2.4 Product Security and Bug Fix Update (Moderate) (RHSA-2024:3781)	Nessus	Red Hat Local Security Checks	high
197635	RHEL 9 : Red Hat OpenStack Platform 17.1 (python-gunicorn) (RHSA-2024:2727)	Nessus	Red Hat Local Security Checks	high
194461	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : python-gunicorn (SUSE-SU-2024:1440-1)	Nessus	SuSE Local Security Checks	high

Detections

Analytics

CVE-2024-1135

high

Tenable Plugins

high

high

high

high

high