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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2019-12521 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html Mailing List  Third Party Advisory 
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2020/04/23/1 Mailing List  Patch  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2020/04/23/1 Mailing List  Patch  Third Party Advisory 
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt Third Party Advisory 
https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html Mailing List  Third Party Advisory 
https://security.gentoo.org/glsa/202005-05 Third Party Advisory 
https://security.gentoo.org/glsa/202005-05 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210205-0006/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20210205-0006/ Third Party Advisory 
https://usn.ubuntu.com/4356-1/ Third Party Advisory 
https://usn.ubuntu.com/4356-1/ Third Party Advisory 
https://www.debian.org/security/2020/dsa-4682 Third Party Advisory 
https://www.debian.org/security/2020/dsa-4682 Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-193 Off-by-one Error cwe source acceptance level NIST  
CWE-787 Out-of-bounds Write cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

14 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-12521
NVD Published Date:
04/15/2020
NVD Last Modified:
11/20/2024
Source:
MITRE