CVE-2021-39520
Published: 20 September 2021
An issue was discovered in libjpeg through 2020021. A NULL pointer dereference exists in the function BlockBitmapRequester::PushReconstructedData() located in blockbitmaprequester.cpp. It allows an attacker to cause Denial of Service.
Notes
| Author | Note |
|---|---|
| jdstrand | libjpeg-turbo is a fork of libjpeg8 |
| mdeslaur | file doesn't exist in libjpeg-turbo |
| eslerm | libjpeg-turbo/libjpeg6b/libjpeg8/libjpeg9 are from different codebases only libjpeg is affected |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libjpeg Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| hirsute |
Not vulnerable
(0.0~git20210129.91985dc-1build1)
|
|
| impish |
Not vulnerable
|
|
| jammy |
Not vulnerable
|
|
| kinetic |
Not vulnerable
|
|
| lunar |
Not vulnerable
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(0.0~git20200925.f145908-1)
|
|
| xenial |
Ignored
(out of standard support)
|
|
|
libjpeg-turbo Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| hirsute |
Not vulnerable
(code not present)
|
|
| impish |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| kinetic |
Not vulnerable
(code not present)
|
|
| lunar |
Not vulnerable
(code not present)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Not vulnerable
(code not present)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
libjpeg6b Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| hirsute |
Ignored
(reached end-of-life)
|
|
| impish |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| kinetic |
Not vulnerable
(code not present)
|
|
| lunar |
Not vulnerable
(code not present)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Not vulnerable
(code not present)
|
|
| xenial |
Needs triage
|
|
|
libjpeg9 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| hirsute |
Ignored
(reached end-of-life)
|
|
| impish |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| kinetic |
Not vulnerable
(code not present)
|
|
| lunar |
Not vulnerable
(code not present)
|
|
| trusty |
Does not exist
|
|
| upstream |
Not vulnerable
(code not present)
|
|
| xenial |
Not vulnerable
(code not present)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | Required |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |