CVE - CVE-2019-12521

CVE-ID
CVE-2019-12521	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://security.netapp.com/advisory/ntap-20210205-0006/ DEBIAN:DSA-4682 URL:https://www.debian.org/security/2020/dsa-4682 GENTOO:GLSA-202005-05 URL:https://security.gentoo.org/glsa/202005-05 MISC:https://gitlab.com/jeriko.one/security/-/blob/master/squid/CVEs/CVE-2019-12521.txt MLIST:[debian-lts-announce] 20200710 [SECURITY] [DLA 2278-1] squid3 security update URL:https://lists.debian.org/debian-lts-announce/2020/07/msg00009.html MLIST:[oss-security] 20200423 [ADVISORY] SQUID-2019:12 Multiple issues in ESI Response processing URL:http://www.openwall.com/lists/oss-security/2020/04/23/1 SUSE:openSUSE-SU-2020:0623 URL:http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00018.html UBUNTU:USN-4356-1 URL:https://usn.ubuntu.com/4356-1/
Assigning CNA
MITRE Corporation
Date Record Created
20190602	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20190602)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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