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[email protected]CVE-2020-28473

HistoryJan 18, 2021 - 12:15 p.m.

CVE-2020-28473

2021-01-1812:15:12

CWE-444

[email protected]

web.nvd.nist.gov

146

bottle

package

vulnerability

web cache poisoning

parameter cloaking

cve-2020-28473

nvd

6.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:H

6.2 Medium

AI Score

Confidence

High

5.8 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:M/Au:N/C:P/I:P/A:N

0.004 Low

EPSS

Percentile

74.8%

JSON

The package bottle from 0 and before 0.12.19 are vulnerable to Web Cache Poisoning by using a vector called parameter cloaking. When the attacker can separate query parameters using a semicolon (;), they can cause a difference in the interpretation of the request between the proxy (running with default configuration) and the server. This can result in malicious requests being cached as completely safe ones, as the proxy would usually not see the semicolon as a separator, and therefore would not include it in a cache key of an unkeyed parameter.

Affected configurations

NVD

Node

bottlepybottleRange<0.12.19

Node

debiandebian_linuxMatch9.0

CPENameOperatorVersion
bottlepy:bottlebottlepy bottlelt0.12.19

CPE	Name	Operator	Version
bottlepy:bottle	bottlepy bottle	lt	0.12.19

CNA Affected

[
  {
    "product": "bottle",
    "vendor": "n/a",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "0",
        "versionType": "custom"
      },
      {
        "lessThan": "0.12.19",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]