CVE-2019-12521 Vulnerability Details

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CVE-2019-12521 Metadata Quick Info

CVE Published: 15/04/2020 | CVE Updated: 04/08/2024 | CVE Year: 2019
Source: mitre | Vendor: n/a | Product: n/a
Status : PUBLISHED

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CVE-2019-12521 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

CVSS Version: 3.1 | Base Score: n/a
Vector: n/a

l➤ Exploitability Metrics:
    Attack Vector (AV)*
    Attack Complexity (AC)*
    Privileges Required (PR)*
    User Interaction (UI)*
    Scope (S)*

l➤ Impact Metrics:
    Confidentiality Impact (C)*
    Integrity Impact (I)*
    Availability Impact (A)*

Weakness Enumeration (CWE)

CWE-ID:
CWE Name: n/a
Source: n/a

Common Attack Pattern Enumeration and Classification (CAPEC)

CAPEC-ID:
CAPEC Description:


Source: NVD (National Vulnerability Database).