CVE-2018-20796
Published: 26 February 2019
In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\227|)(\\1\\1|t1|\\\2537)+' in grep.
Notes
Author | Note |
---|---|
mdeslaur | glibc regex compiler is not supposed to be exposed to untrusted content, and upstream does not consider this to be a security issue: https://sourceware.org/glibc/wiki/Security%20Exceptions https://lists.gnu.org/r/bug-gnulib/2018-09/msg00068.html as of 2020-06-04, no fix available from upstream. We will not be fixing this issue in Ubuntu, marking as ignored. |
Priority
Status
Package | Release | Status |
---|---|---|
eglibc Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
cosmic |
Does not exist
|
|
disco |
Does not exist
|
|
eoan |
Does not exist
|
|
focal |
Does not exist
|
|
trusty |
Ignored
|
|
upstream |
Deferred
|
|
xenial |
Does not exist
|
|
glibc Launchpad, Ubuntu, Debian |
bionic |
Ignored
|
cosmic |
Ignored
(end of life)
|
|
disco |
Ignored
(end of life)
|
|
eoan |
Ignored
|
|
focal |
Ignored
|
|
trusty |
Does not exist
|
|
upstream |
Deferred
|
|
xenial |
Ignored
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 7.5 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |