Public bug reported:
Trying to troubleshoot unexpected behavior with haproxy, I discovered
that lookbehind appears to be broken in version 1:8.31-2ubuntu2.3 of the
libpcre3 package.
I have an haproxy rule to rewrite URL paths that do not begin with
"build" or "static":
reqirep ^([^\ :]*)\ /(?!build|static).*\ (.*) \1\ /index.html\ \2
With the latest version of libpcre3 installed (1:8.31-2ubuntu2.3), this
line matches all requests. If I downgrade to 1:8.31-2ubuntu2.2 and
restart haproxy, the rule correctly matches only paths that do not start
with "static" or "build".
$ lsb_release -rd
Description:Ubuntu 14.04.4 LTS
Release:14.04
$ apt-cache policy libpcre3
libpcre3:
Installed: 1:8.31-2ubuntu2.3
Candidate: 1:8.31-2ubuntu2.3
Version table:
*** 1:8.31-2ubuntu2.3 0
500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty-updates/main
amd64 Packages
100 /var/lib/dpkg/status
1:8.31-2ubuntu2.2 0
500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64
Packages
1:8.31-2ubuntu2 0
500 http://us-east-1.ec2.archive.ubuntu.com/ubuntu/ trusty/main amd64
Packages
** Affects: pcre3 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1691491
Title:
lookbehind broken
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