CVE-2021-3420
Published: 5 March 2021
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
Notes
| Author | Note |
|---|---|
| eslerm | fixed for newlib-4.0.0 on 2020-11-17 with aa106b29a ("malloc/nano-malloc: correctly check for out-of-bounds allocation reqs") |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
gcc-snapshot Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Ignored
(end of standard support, was needs-triage)
|
|
| jammy |
Ignored
(end of standard support, was needs-triage)
|
|
| lunar |
Not vulnerable
(20230315-1ubuntu1)
|
|
| mantic |
Not vulnerable
(20230718-1ubuntu1)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Not vulnerable
(code not present)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
newlib Launchpad, Ubuntu, Debian |
bionic |
Needed
|
| focal |
Ignored
(end of standard support, was needs-triage)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Ignored
(end of life)
|
|
| jammy |
Ignored
(end of standard support, was needs-triage)
|
|
| kinetic |
Ignored
(end of life, was needs-triage)
|
|
| lunar |
Ignored
(end of life, was needed)
|
|
| mantic |
Needed
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(4.0.0)
|
|
| xenial |
Needed
|
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 |