CVE-2018-6551

Gentoo Linux Security Advisory 201804-02

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The malloc implementation in the GNU C Library (aka glibc or libc6), from version 2.24 to 2.26 on powerpc, and only in version 2.26 on i386, did not properly handle malloc calls with arguments close to SIZE_MAX and could return a pointer to a heap region that is smaller than requested, eventually leading to heap corruption.

La implementación malloc en GNU C Library (también conocida como glibc o libc6), desde la versión 2.24 hasta la 2.26 en powerpc y solo en la versión 2.26 en i386, no gestionaba correctamente las llamadas malloc con argumentos cercanos a SIZE_MAX y podría devolver un puntero a una región de la memoria dinámica (heap) que es más pequeña que la solicitada, provocando al final una corrupción de heap.

Multiple vulnerabilities have been found in glibc, the worst of which could allow remote attackers to execute arbitrary code. Versions less than 2.25-r11 are affected.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-04-03 CVE Published
2018-02-02 CVE Reserved
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-190: Integer Overflow or Wraparound
CWE-787: Out-of-bounds Write

CAPEC

References (3)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20190404-0003	X_refsource_confirm
https://sourceware.org/bugzilla/show_bug.cgi?id=22774	Issue Tracking
https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=8e448310d74b283c5cd02b9ed7fb997b47bf9b22	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Gnu Search vendor "Gnu"		Glibc Search vendor "Gnu" for product "Glibc"				>= 2.24 <= 2.26 Search vendor "Gnu" for product "Glibc" and version " >= 2.24 <= 2.26"		-		Affected