Rapid7 Vulnerability & Exploit Database

IBM HTTP Server: CVE-2021-45960: Expat (aka libexpat) is vulnerable to a denial of service, caused by a realloc misbehavior issue in the storeAtts function in xmlparse.c

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

IBM HTTP Server: CVE-2021-45960: Expat (aka libexpat) is vulnerable to a denial of service, caused by a realloc misbehavior issue in the storeAtts function in xmlparse.c

Severity
9
CVSS
(AV:N/AC:L/Au:S/C:C/I:C/A:C)
Published
01/01/2022
Created
09/06/2022
Added
08/31/2022
Modified
06/29/2023

Description

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

Solution(s)

  • ibm-http_server-apply-interim-fix-ph43122-for-7_0
  • ibm-http_server-apply-interim-fix-ph43122-for-8_0
  • ibm-http_server-apply-interim-fix-ph43122-for-8_5
  • ibm-http_server-apply-interim-fix-ph43122-for-9_0

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;