CVE-2020-1917
Published: 10 March 2021
xbuf_format_converter, used as part of exif_read_data, was appending a terminating null character to the generated string, but was not using its standard append char function. As a result, if the buffer was full, it would result in an out-of-bounds write. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Priority
Status
Package | Release | Status |
---|---|---|
hhvm Launchpad, Ubuntu, Debian |
impish |
Does not exist
|
bionic |
Needs triage
|
|
focal |
Does not exist
|
|
xenial |
Needs triage
|
|
jammy |
Does not exist
|
|
kinetic |
Does not exist
|
|
groovy |
Does not exist
|
|
hirsute |
Does not exist
|
|
lunar |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needs triage
|
|
mantic |
Does not exist
|
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |