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CVE-2017-17821

Published: 21 December 2017

WTF/wtf/FastBitVector.h in WebKit, as distributed in Safari Technology Preview Release 46, allows remote attackers to cause a denial of service (buffer overflow) or possibly have unspecified other impact because it calls the FastBitVectorWordOwner::resizeSlow function (in WTF/wtf/FastBitVector.cpp) for a purpose other than initializing a bitvector size, and resizeSlow mishandles cases where the old array length is greater than the new array length.

Notes

AuthorNote
jdstrand
webkit receives limited support. For details, see
https://wiki.ubuntu.com/SecurityTeam/FAQ#webkit
webkit in Ubuntu uses the JavaScriptCore (JSC) engine, not V8
mdeslaur
as of 2018-03-19, no details if this affects webkit2gtk
This still wasn't mentioned in webkit2gtk advisories as of
2018-04-04, so marking as not-affected

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
qtwebkit
Launchpad, Ubuntu, Debian
bionic Does not exist

disco Does not exist

eoan Ignored
(end of life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

qtwebkit-opensource-src
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Ignored

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Ignored

groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Ignored

kinetic Ignored
(end of life, was needs-triage)
lunar Ignored
(end of life, was needs-triage)
mantic Ignored

noble Ignored

trusty Does not exist
(trusty was needs-triage)
upstream Ignored

xenial Ignored

zesty Ignored
(end of life)
qtwebkit-source
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Ignored

cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Ignored

zesty Ignored
(end of life)
webkit2gtk
Launchpad, Ubuntu, Debian
artful Not vulnerable

bionic Not vulnerable

cosmic Not vulnerable

disco Not vulnerable

eoan Not vulnerable

focal Not vulnerable

groovy Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

noble Not vulnerable

trusty Does not exist

upstream Needs triage

xenial Not vulnerable

zesty Ignored
(end of life)
webkitgtk
Launchpad, Ubuntu, Debian
artful Ignored
(end of life)
bionic Ignored

cosmic Ignored
(end of life)
disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

lunar Does not exist

mantic Does not exist

noble Does not exist

trusty Does not exist
(trusty was needs-triage)
upstream Needs triage

xenial Ignored

zesty Ignored
(end of life)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H