CVE-2022-24761
published 2022-03-17CVE-2022-24761: Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly…
PriorityP345high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
1.78%
75.8th percentile
Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was discarding them without validating that they did not contain illegal characters. This vulnerability has been patched in Waitress 2.1.1. A workaround is available. When deploying a proxy in front of waitress, turning on any and all functionality to make sure that the request matches the RFC7230 standard. Certain proxy servers may not have this functionality though and users are encouraged to upgrade to the latest version of waitress instead.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| agendaless | waitress | < 2.1.1 | 2.1.1 |
| debian | debian_linux | — | — |
| debian | waitress | < waitress 2.1.1-1 (bookworm) | waitress 2.1.1-1 (bookworm) |
| msrc | azl3_python-waitress_3.0.1-1_on_azure_linux_3.0 | — | — |
| pylons | waitress | < 2.1.1 | 2.1.1 |
| pylons | waitress | >= 0 < 1.4.4-1.1+deb11u1 | 1.4.4-1.1+deb11u1 |
| pylons | waitress | >= 0 < 2.1.1-1 | 2.1.1-1 |
| pylons | waitress | >= 0 < 2.1.1-1 | 2.1.1-1 |
| pylons | waitress | >= 0 < 2.1.1-1 | 2.1.1-1 |
| pylons | waitress | >= 0 < 2.1.1 | 2.1.1 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:P/A:N
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
vendor_oracle7.5HIGH
vendor_redhat7.5HIGH
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GHSA
HTTP Request Smuggling in waitress
ghsa·2022-03-18
CVE-2022-24761 [HIGH] CWE-444 HTTP Request Smuggling in waitress
HTTP Request Smuggling in waitress
### Impact
When using Waitress behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends.
This would allow requests to be smuggled via the front-end proxy to waitress and later behavior.
There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory:
- The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits.
- Waitress does not support chunk extensions, however it was discarding them without validating that the
OSV
HTTP Request Smuggling in waitress
osv·2022-03-18
CVE-2022-24761 [HIGH] HTTP Request Smuggling in waitress
HTTP Request Smuggling in waitress
### Impact
When using Waitress behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends.
This would allow requests to be smuggled via the front-end proxy to waitress and later behavior.
There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory:
- The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits.
- Waitress does not support chunk extensions, however it was discarding them without validating that the
OSV
CVE-2022-24761: Waitress is a Web Server Gateway Interface server for Python 2 and 3
osv·2022-03-17·CVSS 7.5
CVE-2022-24761 [HIGH] CVE-2022-24761: Waitress is a Web Server Gateway Interface server for Python 2 and 3
Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was
Oracle
Oracle Oracle Communications Risk Matrix: DBTier (waitress) — CVE-2022-24761
vendor_oracle·2022-10-15·CVSS 7.5
CVE-2022-24761 [HIGH] Oracle Oracle Communications Risk Matrix: DBTier (waitress) — CVE-2022-24761
Oracle Oracle Communications Risk Matrix: DBTier (waitress) vulnerability
CVE: CVE-2022-24761
CVSS: 7.5
Protocol: HTTP
Remote exploit: Yes
Affected versions: Network
Advisory: cpuoct2022 (OCT 2022)
Ubuntu
Waitress vulnerability
vendor_ubuntu·2022-04-05
CVE-2022-24761 Waitress vulnerability
Title: Waitress vulnerability
Summary: waitress could be made to expose sensitive information if it received
a specially crafted request.
It was discovered that Waitress incorrectly handled certain requests.
An attacker could possibly use this issue to expose sensitive information.
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
waitress: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
vendor_redhat·2022-03-17·CVSS 7.5
CVE-2022-24761 [HIGH] CWE-444 waitress: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
waitress: Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')
Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only d
Microsoft
HTTP Request Smuggling in waitress
vendor_msrc·2022-03-08·CVSS 7.5
CVE-2022-24761 [HIGH] CWE-444 HTTP Request Smuggling in waitress
HTTP Request Smuggling in waitress
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
GitHub_M: GitHub_M
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/
Debian
CVE-2022-24761: waitress - Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using...
vendor_debian·2022·CVSS 7.5
CVE-2022-24761 [HIGH] CVE-2022-24761: waitress - Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using...
Waitress is a Web Server Gateway Interface server for Python 2 and 3. When using Waitress versions 2.1.0 and prior behind a proxy that does not properly validate the incoming HTTP request matches the RFC7230 standard, Waitress and the frontend proxy may disagree on where one request starts and where it ends. This would allow requests to be smuggled via the front-end proxy to waitress and later behavior. There are two classes of vulnerability that may lead to request smuggling that are addressed by this advisory: The use of Python's `int()` to parse strings into integers, leading to `+10` to be parsed as `10`, or `0x01` to be parsed as `1`, where as the standard specifies that the string should contain only digits or hex digits; and Waitress does not support chunk extensions, however it was
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0https://github.com/Pylons/waitress/releases/tag/v2.1.1https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlhttps://www.debian.org/security/2022/dsa-5138https://github.com/Pylons/waitress/commit/9e0b8c801e4d505c2ffc91b891af4ba48af715e0https://github.com/Pylons/waitress/releases/tag/v2.1.1https://github.com/Pylons/waitress/security/advisories/GHSA-4f7p-27jc-3c36https://lists.debian.org/debian-lts-announce/2022/05/msg00011.htmlhttps://www.debian.org/security/2022/dsa-5138
2022-03-17
Published