CVE-2017-17426

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.

References

https://sourceware.org/bugzilla/show_bug.cgi?id=22375

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6

Details

Source: MITRE

Published: 2017-12-05

Updated: 2017-12-15

Type: CWE-190

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 2.2

Severity: HIGH

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:gnu:glibc:2.26:*:*:*:*:*:*:*

Tenable Plugins

View all (5 total)

IDNameProductFamilySeverity
147282NewStart CGSL MAIN 6.02 : glibc Multiple Vulnerabilities (NS-SA-2021-0053)NessusNewStart CGSL Local Security Checks
high
121902Photon OS 2.0: Glibc PHSA-2018-2.0-0009NessusPhotonOS Local Security Checks
critical
111278Photon OS 2.0 : glibc / linux / rsync / curl (PhotonOS-PHSA-2018-2.0-0009) (deprecated)NessusPhotonOS Local Security Checks
critical
106134Ubuntu 14.04 LTS / 16.04 LTS / 17.10 : eglibc, glibc vulnerabilities (USN-3534-1)NessusUbuntu Local Security Checks
critical
106014Fedora 27 : glibc (2017-fb5e227432)NessusFedora Local Security Checks
critical