CVE-2021-35942
Published: 22 July 2021
The wordexp function in the GNU C Library (aka glibc) through 2.33 may crash or read arbitrary memory in parse_param (in posix/wordexp.c) when called with an untrusted, crafted pattern, potentially resulting in a denial of service or disclosure of information. This occurs because atoi was used but strtoul should have been used to ensure correct calculations.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
eglibc Launchpad, Ubuntu, Debian |
bionic |
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
|
|
| trusty |
Needed
|
|
| upstream |
Needs triage
|
|
| xenial |
Does not exist
|
|
|
glibc Launchpad, Ubuntu, Debian |
bionic |
Released
(2.27-3ubuntu1.5)
|
| focal |
Released
(2.31-0ubuntu9.7)
|
|
| groovy |
Ignored
(end of life)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Not vulnerable
(2.34-0ubuntu1)
|
|
| jammy |
Not vulnerable
(2.34-0ubuntu1)
|
|
| kinetic |
Not vulnerable
(2.34-0ubuntu1)
|
|
| lunar |
Not vulnerable
(2.34-0ubuntu1)
|
|
| mantic |
Not vulnerable
(2.34-0ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(2.34)
|
|
| xenial |
Released
(2.23-0ubuntu11.3+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=5adda61f62b77384718b4c0d8336ade8f2b4b35c |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.1 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |