Re: libcap-ng update coming to rawhide

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Hello,

The new libcap-ng has been built into rawhide.

Cheers,
-Steve

On Thursday, November 12, 2020 2:45:41 PM EST Steve Grubb wrote:
> A new version of libcap-ng is going to be released next week. Normally this
>  isn't newsworthy, nor is this a soname version bump. But it is important
> to let the broader community know something about it. The behaviour of
> capng_apply is changing slightly.
> 
> In the past, capng_apply would silently eat errors when the bounding set 
> could not be changed. In order to change the bounding set, you have to have
> 
> CAP_SETPCAP. A developer reported an issue in github where their project
> needed to know that capng_apply was completely successful changing the
> bounding set. Meaning that they need an error returned. I didn't think too
> much of it and made the change.
> 
> Then one day I noticed that I could not update a package against Fedora's
> git  or push a change. Looking into this, I found gnome-keyring was not
> working. [1]  I dug into the source code and found that it was trying to
> change the bounding set when it had partial capabilities. The fix is to
> simply verify that you have CAP_SETPCAP before attempting this.
> 
> I don't know of any other software that is affected. But I wanted to give 
> everyone a heads up before I push it out. I always dogfood libraries I
> work on, so maybe this is the only issue.
> 
> Eventually libcap-ng needs to get pushed over to F33 because there is a 
> problem with ambient capailities that the new release fixes. And speaking
> of  ambient capabilities, the new version of libcap-ng contains a new
> library libdrop_ambient.so. You can use it with LD_PRELOAD to force an app
> to drop ambient capabilities leaving the other capabilities intact. All
> the work is done in the constructor, so no function calls are needed.
> 
> Best Regards,
> -Steve
> 
> 1 - https://bugzilla.redhat.com/show_bug.cgi?id=1888978
> 
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