Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2019-12521 First vendor Publication 2020-04-15
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.9
Base Score 5.9 Environmental Score 5.9
impact SubScore 3.6 Temporal Score 5.9
Exploitabality Sub Score 2.2
 
Attack Vector Network Attack Complexity High
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in Squid through 4.7. When Squid is parsing ESI, it keeps the ESI elements in ESIContext. ESIContext contains a buffer for holding a stack of ESIElements. When a new ESIElement is parsed, it is added via addStackElement. addStackElement has a check for the number of elements in this buffer, but it's off by 1, leading to a Heap Overflow of 1 element. The overflow is within the same structure so it can't affect adjacent memory blocks, and thus just leads to a crash while processing.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12521

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-193 Off-by-one Error

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 290
Os 4
Os 2
Os 1

Sources (Detail)

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html
http://www.openwall.com/lists/oss-security/2020/04/23/1
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-1252...
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html
https://security.gentoo.org/glsa/202005-05
https://security.netapp.com/advisory/ntap-20210205-0006/
https://usn.ubuntu.com/4356-1/
https://www.debian.org/security/2020/dsa-4682
Source Url

Alert History

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Date Informations
2024-11-28 13:25:50
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2021-02-11 17:22:48
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2020-09-03 01:25:11
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2020-06-05 21:23:03
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2020-05-23 02:41:31
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2020-05-23 02:22:11
  • First insertion