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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.

Priority

Negligible

CVSS 3 base score: 7.5

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

precise Ignored

trusty Ignored

upstream Deferred

xenial Does not exist

glibc
Launchpad, Ubuntu, Debian
bionic Ignored

cosmic Ignored
(reached end-of-life)
disco Ignored
(reached end-of-life)
eoan Ignored

focal Ignored

precise Does not exist

trusty Does not exist

upstream Deferred

xenial Ignored

Notes

AuthorNote
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.

References

Bugs