CVE-2021-3999
Published: 1 February 2022
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
trusty |
Needs triage
|
| xenial |
Does not exist
|
|
| bionic |
Does not exist
|
|
| focal |
Does not exist
|
|
| hirsute |
Does not exist
|
|
| impish |
Does not exist
|
|
| upstream |
Needs triage
|
|
| jammy |
Does not exist
|
|
| kinetic |
Does not exist
|
|
| lunar |
Does not exist
|
|
|
glibc Launchpad, Ubuntu, Debian |
hirsute |
Ignored
(end of life)
|
| upstream |
Needs triage
|
|
| bionic |
Released
(2.27-3ubuntu1.5)
|
|
| focal |
Released
(2.31-0ubuntu9.7)
|
|
| impish |
Released
(2.34-0ubuntu3.2)
|
|
| jammy |
Not vulnerable
(2.35-0ubuntu1)
|
|
| kinetic |
Not vulnerable
(2.35-0ubuntu1)
|
|
| lunar |
Not vulnerable
(2.35-0ubuntu1)
|
|
|
Patches: upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=23e0e8f5f1fb5ed150253d986ecccdc90c2dcd5e upstream: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=472e799a5f2102bc0c3206dbd5a801765fceb39c |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |