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| purl | pkg:pypi/urllib3@1.25.4 |
| Vulnerability | Summary | Fixed by |
|---|---|---|
|
VCID-1cgk-q3r3-aaam
Aliases: CVE-2024-37891 GHSA-34jh-p97f-mpxf |
urllib3's Proxy-Authorization request header isn't stripped during cross-origin redirects When using urllib3's proxy support with `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected. However, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally configure the `Proxy-Authorization` header even though it won't have any effect as the request is not using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on cross-origin redirects. Because this is a highly unlikely scenario, we believe the severity of this vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip the `Proxy-Authorization` header during cross-origin redirects to avoid the small chance that users are doing this on accident. Users should use urllib3's proxy support or disable automatic redirects to achieve safe processing of the `Proxy-Authorization` header, but we still decided to strip the header by default in order to further protect users who aren't using the correct approach. ## Affected usages We believe the number of usages affected by this advisory is low. It requires all of the following to be true to be exploited: * Setting the `Proxy-Authorization` header without using urllib3's built-in proxy support. * Not disabling HTTP redirects. * Either not using an HTTPS origin server or for the proxy or target origin to redirect to a malicious origin. ## Remediation * Using the `Proxy-Authorization` header with urllib3's `ProxyManager`. * Disabling HTTP redirects using `redirects=False` when sending requests. * Not using the `Proxy-Authorization` header. |
Affected by 0 other vulnerabilities. Affected by 0 other vulnerabilities. Affected by 0 other vulnerabilities. |
|
VCID-457q-9vme-aaac
Aliases: CVE-2020-7212 GHSA-hmv2-79q8-fv6g PYSEC-2020-149 |
The _encode_invalid_chars function in util/url.py in the urllib3 library 1.25.2 through 1.25.7 for Python allows a denial of service (CPU consumption) because of an inefficient algorithm. The percent_encodings array contains all matches of percent encodings. It is not deduplicated. For a URL of length N, the size of percent_encodings may be up to O(N). The next step (normalize existing percent-encoded bytes) also takes up to O(N) for each step, so the total time is O(N^2). If percent_encodings were deduplicated, the time to compute _encode_invalid_chars would be O(kN), where k is at most 484 ((10+6*2)^2). |
Affected by 5 other vulnerabilities. |
|
VCID-6rq6-hxp1-aaae
Aliases: CVE-2021-33503 GHSA-q2q7-5pp4-w6pg PYSEC-2021-108 |
Uncontrolled Resource Consumption An issue was discovered in urllib3, when provided with a URL containing many `@` characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect. |
Affected by 3 other vulnerabilities. |
|
VCID-7ghb-wt6a-aaah
Aliases: CVE-2020-26137 GHSA-wqvq-5m8c-6g24 PYSEC-2020-148 |
urllib3 before 1.25.9 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of putrequest(). NOTE: this is similar to CVE-2020-26116. |
Affected by 4 other vulnerabilities. |
|
VCID-c4sy-7zv4-aaas
Aliases: CVE-2023-43804 GHSA-v845-jxx5-vc9f PYSEC-0000-CVE-2023-43804 PYSEC-2023-192 |
`Cookie` HTTP header isn't stripped on cross-origin redirects |
Affected by 2 other vulnerabilities. Affected by 0 other vulnerabilities. Affected by 2 other vulnerabilities. |
|
VCID-r496-vgsm-aaac
Aliases: CVE-2023-45803 GHSA-g4mx-q9vg-27p4 PYSEC-0000-CVE-2023-45803 PYSEC-2023-212 |
urllib3's request body not stripped after redirect from 303 status changes request method to GET |
Affected by 1 other vulnerability. Affected by 0 other vulnerabilities. Affected by 1 other vulnerability. |
| Vulnerability | Summary | Aliases |
|---|---|---|
| VCID-6rq6-hxp1-aaae | Uncontrolled Resource Consumption An issue was discovered in urllib3, when provided with a URL containing many `@` characters in the authority component, the authority regular expression exhibits catastrophic backtracking, causing a denial of service if a URL were passed as a parameter or redirected to via an HTTP redirect. |
CVE-2021-33503
GHSA-q2q7-5pp4-w6pg PYSEC-2021-108 |