Executive Summary

Informations
Name CVE-2019-12520 First vendor Publication 2020-04-15
Vendor Cve Last vendor Modification 2021-02-11

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact None Availability Impact None
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in Squid through 4.7 and 5. When receiving a request, Squid checks its cache to see if it can serve up a response. It does this by making a MD5 hash of the absolute URL of the request. If found, it servers the request. The absolute URL can include the decoded UserInfo (username and password) for certain protocols. This decoded info is prepended to the domain. This allows an attacker to provide a username that has special characters to delimit the domain, and treat the rest of the URL as a path or query string. An attacker could first make a request to their domain using an encoded username, then when a request for the target domain comes in that decodes to the exact URL, it will serve the attacker's HTML instead of the real HTML. On Squid servers that also act as reverse proxies, this allows an attacker to gain access to features that only reverse proxies can use, such as ESI.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12520

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 290
Os 2
Os 2

Sources (Detail)

Source Url
CONFIRM https://security.netapp.com/advisory/ntap-20210205-0006/
DEBIAN https://www.debian.org/security/2020/dsa-4682
MISC http://www.squid-cache.org/Versions/v4/
http://www.squid-cache.org/Versions/v4/changesets/
https://github.com/squid-cache/squid/commits/v4
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-1252...
MLIST https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
UBUNTU https://usn.ubuntu.com/4446-1/

Alert History

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Date Informations
2024-02-02 02:00:56
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2024-02-01 12:16:47
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2023-09-05 12:58:18
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2023-09-05 01:16:29
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2023-09-02 12:57:35
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2023-09-02 01:16:45
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2023-08-12 13:01:26
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2023-08-12 01:16:03
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2023-08-11 12:55:18
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2023-08-11 01:16:30
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2023-08-06 12:53:40
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2023-08-06 01:15:59
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2023-08-04 12:53:56
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2023-08-04 01:16:08
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2023-07-14 12:53:55
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2023-07-14 01:16:05
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2023-03-29 01:55:17
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2023-03-28 12:16:24
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2022-10-11 12:48:10
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2022-10-11 01:15:59
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2022-04-28 01:41:58
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2021-06-29 12:30:18
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2021-06-16 01:31:12
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2021-05-05 01:33:48
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2021-05-04 13:29:02
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2021-04-22 02:43:12
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2021-02-11 17:22:47
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2021-02-05 17:22:47
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2020-08-06 05:22:50
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2020-07-11 09:22:39
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2020-05-24 01:27:30
  • Multiple Updates
2020-05-23 02:22:11
  • First insertion