CVE-2017-17426
Published: 5 December 2017
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.
Priority
Status
Package | Release | Status |
---|---|---|
eglibc Launchpad, Ubuntu, Debian |
upstream |
Not vulnerable
|
trusty |
Not vulnerable
|
|
xenial |
Does not exist
|
|
zesty |
Does not exist
|
|
artful |
Does not exist
|
|
bionic |
Does not exist
|
|
cosmic |
Does not exist
|
|
glibc Launchpad, Ubuntu, Debian |
upstream |
Released
(2.27)
|
trusty |
Does not exist
|
|
xenial |
Not vulnerable
|
|
zesty |
Not vulnerable
|
|
artful |
Released
(2.26-0ubuntu2.1)
|
|
bionic |
Not vulnerable
(2.27-3ubuntu1)
|
|
cosmic |
Not vulnerable
(2.27-3ubuntu1)
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=34697694e8a93b325b18f25f7dcded55d6baeaf6 |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 8.1 |
Attack vector | Network |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |