CVE-2022-25314

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ModerateModerate ImpactWhat does this mean?

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Description

An integer overflow flaw was found in expat. This issue affects the encoding name parameter at the parser creation time, which is often hard-coded (rather than user input), takes a value in the gigabytes to trigger, and on a 64-bit machine. This flaw can cause a denial of service.

An integer overflow flaw was found in expat. This issue affects the encoding name parameter at the parser creation time, which is often hard-coded (rather than user input), takes a value in the gigabytes to trigger, and on a 64-bit machine. This flaw can cause a denial of service.

Statement

This flaw has been rated as having a severity of Moderate. The encoding name parameter is often hard-coded (rather than user input) and it would take a value in the gigabytes for the name to trigger this issue. The versions of `expat` as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as they did not include the vulnerable copyString() function.

This flaw has been rated as having a severity of Moderate. The encoding name parameter is often hard-coded (rather than user input) and it would take a value in the gigabytes for the name to trigger this issue. The versions of expat as shipped with Red Hat Enterprise Linux 6 and 7 are not affected by this flaw as they did not include the vulnerable copyString() function.

Mitigation

There is no known mitigation other than restricting applications using the expat library from processing untrusted XML content.

Additional information

  • Bugzilla 2056354: expat: Integer overflow in copyString()
  • CWE-190: Integer Overflow or Wraparound
  • FAQ: Frequently asked questions about CVE-2022-25314

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

7.5

7.5

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

None

None

Scope

Unchanged

Unchanged

Confidentiality Impact

None

None

Integrity Impact

None

None

Availability Impact

High

High

CVSS v3 Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

My product is listed as "Out of Support Scope". What does this mean?

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