Wireshark · Wireshark-dev: Re: [Wireshark-dev] Setcap in ubuntu 20.04

[Jaap Keuter <jaap.keuter@xxxxxxxxx>]

Hi,

Yes, I’ve seen this some time ago, and Gerald bumped into it also.

What I do as a workaround, is to add a symlink in the build directory: libwsutil.so.0 -> run/libwsutil.so.0

Thanks,

Jaap

On 6 Jan 2021, at 22:19, João Valverde via Wireshark-dev <wireshark-dev@xxxxxxxxxxxxx> wrote:

On 06/01/21 20:32, Dario Lombardo wrote:

Another user on SO suggested a fix

https://stackoverflow.com/questions/58255970/wireshark-dumpcap-with-setcap-set-to-no-root-capture-failes-to-start-in-ubuntu-1

However I'm pretty sure I've run wireshark from the build dir before with setcap.

The change in behaviour might be because of the upgrade of glibc (system libc).

Anyway see ld.so(8) "Secure-execution mode". And [1] and [2].

[1] https://cmake.org/cmake/help/latest/prop_tgt/BUILD_RPATH_USE_ORIGIN.html.
[2] https://gitlab.com/wireshark/wireshark/-/commit/f3f97e976ba67140cac53471a1f84f77badf1ec6

On Wed, Jan 6, 2021 at 9:20 PM Dario Lombardo <lomato@xxxxxxxxx> wrote:

Hi

I got a new laptop and I took the chance to upgrade my OS. Now I have Ubuntu 20.04. Today I had an unexpected behavior. After compilation, I issued the setcap command, but then I got:

$ sudo setcap cap_net_raw,cap_net_admin=eip run/dumpcap
$ ./run/dumpcap -D
./run/dumpcap: error while loading shared libraries: libwsutil.so.0: cannot open shared object file: No such file or directory

Removing the capabilities gave my dumpcap back.

$ sudo setcap -r run/dumpcap
$ ./run/dumpcap -D
1. wlp59s0
2. nlmon0
3. lo (Loopback)
[...]

Another user from ask, hit the same problem, like 1 year ago, on ubuntu 18: https://ask.wireshark.org/question/12115/wireshark-dumpcap-with-setcap-set-to-no-root-capture-failes-to-start-in-ubuntu-1810/

I'm still trying to figure out if I made other configurations before, but I can't recall anything useful.

Any ideas?

Thanks.

Dario.

--

Naima is on the broom.

--

Naima is online.

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