exiv2 crashes when trying to read xmp metadata made by darktable software

[Aceler]

Maybe the XMP data from darktable is corrupt, but exiv2 shouldn't crash anyways.

To Reproduce

Export a jpg file from Darktable software. Open it up in exiv2.

$ exiv2 -p x pr 0002.jpg
Xmp.crd.CameraProfile XmpText 12 Camera Vivid
Xmp.crd.ColorNoiseReduction XmpText 1 7
Xmp.crd.ColorNoiseReductionDetail XmpText 2 50
Xmp.crd.ColorNoiseReductionSmoothness XmpText 2 50
Xmp.crd.Contrast2012 XmpText 1 0
Xmp.crd.Exposure2012 XmpText 4 0.00
Xmp.crd.Highlights2012 XmpText 1 0
Xmp.crd.LuminanceNoiseReductionContrast XmpText 1 0
Xmp.crd.LuminanceNoiseReductionDetail XmpText 2 75
Xmp.crd.LuminanceSmoothing XmpText 1 3
Xmp.crd.Saturation XmpText 1 0
Xmp.crd.Shadows2012 XmpText 1 0
Xmp.crd.SharpenDetail XmpText 2 25
Xmp.crd.SharpenEdgeMasking XmpText 1 0
Xmp.crd.SharpenRadius XmpText 4 2.00
Xmp.crd.Sharpness XmpText 2 56
Xmp.exif.DateTimeOriginal XmpText 19 Uncaught exception: basic_string::at: __n (which is 19) >= this->size() (which is 19)

$ exiv2 -V
exiv2 0.27.2

Desktop (please complete the following information):

• OS and version: Ubuntu 20.04

Additional context

This also cause gthumb, gwenview and other viewers to crash. See https://bugs.launchpad.net/ubuntu/+source/gthumb/+bug/1943586

Test image attached here:

[kmilos]

Thanks for the report, but a duplicate of #2011, please search before opening new issues.

Already fixed by exiv2 in #1918, it is up to packagers to update or backport.

[clanmills]

Beautiful test image. Is the location Switzerland or Canada?

[Aceler]

@kmilos ah, yes, I searched only for open reports, my bad. I'm sorry.

@clanmills It is Tolyatti, Russia.