947183 - URL-encoded sitename expanded incorrectly

Status: RESOLVED DUPLICATE of bug 43659

(Core :: Networking, defect)

Description

[John]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0 (Beta/Release)
Build ID: 20131112160018

Steps to reproduce:

a) Connect to http://localhos%74:8080/home
b) Connect to http://lo%63alhost:8080/home



Actual results:

a) "Server not found: Firefox can't find the server at localhost74."
b) "Server not found: Firefox can't find the server at localhostst."



Expected results:

These should both be equivalent to http://localhost:8080/home.
The decoded name seems to be overwriting the corresponding characters in the buffer without altering the buffer length.
Is Firefox written in C, perchance? :-)

Comment 1

[[:Aleksej]]

firefox-25.0.en-US.linux64
2013-12-10-03-02-02-mozilla-central-firefox-29.0a1.en-US.linux-x86_64

Firefox can't find the server at www.localhos%74.com.
Firefox can't find the server at www.lo%63alhost.com.

Comment 2

[John]

Attachment: Capture.JPG

Screenshot showing the bug on Firefox 28.0 (32-bit) running on Windows 7 (64-bit).

Comment 4

[John]

(In reply to Masatoshi Kimura [:emk] from comment #3)
> *** This bug has been marked as a duplicate of bug 43659 ***

Is it really a duplicate? 43659 was reported as fixed over a decade ago, and doesn't have the same symptoms at all. What I'm seeing is the decoded string overlays the original decoded string but without chaging the length, so in lo%63alhost (11 chars), the "%63" is replaced by "c", the rest of the string "alhost" is appended, which should give "localhost" (9 chars) but instead it gives "localhostst" (11 chars, just like the original). In 43659, "%69%6e%74%65%6c" (15 chars) apparently gets reduced to "inte%6c" (7 chars).

Comment 5

[Masatoshi Kimura [:emk]]

Bug 43659 is NOT fixed yet (see the status).