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[email protected]CVE-2021-23336

HistoryFeb 15, 2021 - 1:15 p.m.

CVE-2021-23336

2021-02-1513:15:12

CWE-444

[email protected]

web.nvd.nist.gov

663

cve

2021

23336

web cache poisoning

python

cpython

urllib

nvd

4 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

HIGH

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

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

50.0%

JSON

The package python/cpython from 0 and before 3.6.13, from 3.7.0 and before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before 3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl and urllib.parse.parse_qs 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

pythonpythonRange<3.6.13

pythonpythonRange3.7.0–3.7.10

pythonpythonRange3.8.0–3.8.8

pythonpythonRange3.9.0–3.9.2

Node

fedoraprojectfedoraMatch32

fedoraprojectfedoraMatch33

fedoraprojectfedoraMatch34

Node

debiandebian_linuxMatch9.0

Node

netappcloud_backupMatch-

netappinventory_collect_toolMatch-

netappontap_select_deploy_administration_utilityMatch-

netappsnapcenterMatch-

Node

djangoprojectdjangoRange2.2–2.2.19

djangoprojectdjangoRange3.0–3.0.13

djangoprojectdjangoRange3.1–3.1.7

Node

oraclecommunications_offline_mediation_controllerMatch12.0.0.3.0

oraclecommunications_pricing_design_centerMatch12.0.0.3.0

oracleenterprise_manager_ops_centerMatch12.4.0.0

oraclezfs_storage_applianceMatch8.8

CPENameOperatorVersion
python:pythonpythonlt3.6.13
python:pythonpythonlt3.7.10
python:pythonpythonlt3.8.8
python:pythonpythonlt3.9.2

CPE	Name	Operator	Version
python:python	python	lt	3.6.13
python:python	python	lt	3.7.10
python:python	python	lt	3.8.8
python:python	python	lt	3.9.2

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "python/cpython",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThan": "3.6.13",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "3.7.0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThan": "3.7.10",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "3.8.0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThan": "3.8.8",
        "status": "affected",
        "versionType": "custom"
      },
      {
        "version": "3.9.0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      },
      {
        "version": "unspecified",
        "lessThan": "3.9.2",
        "status": "affected",
        "versionType": "custom"
      }
    ]
  }
]

References

www.openwall.com/lists/oss-security/2021/02/19/4

www.openwall.com/lists/oss-security/2021/05/01/2

github.com/python/cpython/pull/24297

lists.apache.org/thread.html/ra8ce70088ba291f358e077cafdb14d174b7a1ce9a9d86d1b332d6367%40%3Cusers.airflow.apache.org%3E

lists.apache.org/thread.html/rc005f4de9d9b0ba943ceb8ff5a21a5c6ff8a9df52632476698d99432%40%3Cannounce.apache.org%3E

lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E

lists.debian.org/debian-lts-announce/2021/02/msg00030.html

lists.debian.org/debian-lts-announce/2021/04/msg00005.html

lists.debian.org/debian-lts-announce/2021/04/msg00015.html

lists.debian.org/debian-lts-announce/2023/09/msg00022.html

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3EPYWWFDV22CJ5AOH5VCE72DOASZZ255/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YKKDLXL3UEZ3J426C2XTBS63AHE46SM/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/46N6A52EGSXHJYCZWVMBJJIH4NWIV2B5/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FONHJIOZOFD7CD35KZL6SVBUTMBPGZGA/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HCQTCSP6SCVIYNIRUJC5X7YBVUHPLSC4/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZTM7KLHFCE3LWSEVO2NAFLUHMGYMCRY/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IHQDU7NXA7EWAE4W7VO6MURVJIULEPPR/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KJXCMHLY7H3FIYLE4OKDYUILU2CCRUCZ/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LVNH6Z24IG3E67ZCQGGJ46FZB4XFLQNZ/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MNUN5SOMFL2BBKP6ZAICIIUPQKZDMGYO/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MP572OLHMS7MZO4KUPSCIMSZIA5IZZ62/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N6VXJZSZ6N64AILJX4CTMACYGQGHHD5C/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJSCSN722JO2E2AGPWD4NTGVELVRPB4R/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NODWHDIFBQE5RU5PUWUVE47JOT5VCMJ2/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OAGSWNGZJ6HQ5ISA67SNMK3CJRKICET7/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RSLQD5CCM75IZGAMBDGUZEATYU5YSGJ7/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGIY6I4YS3WOXAK4SXKIEOC2G4VZKIR7/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFTELUMWZE3KV3JB2H5EE6VFRZFRD5MV/

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W2LSKBEFI5SYEY5FM6ICZVZM5WRQUCS4/

security.gentoo.org/glsa/202104-04

security.netapp.com/advisory/ntap-20210326-0004/

snyk.io/blog/cache-poisoning-in-popular-open-source-packages/

snyk.io/vuln/SNYK-UPSTREAM-PYTHONCPYTHON-1074933

www.oracle.com//security-alerts/cpujul2021.html

www.oracle.com/security-alerts/cpuApr2021.html

www.oracle.com/security-alerts/cpujan2022.html

www.oracle.com/security-alerts/cpuoct2021.html

Social References

4 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

HIGH

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

HIGH

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

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

50.0%

JSON

CVE-2021-23336

Affected configurations

CNA Affected

References

Social References

Related