Graeme Geldenhuys wrote 5 lines
I think Graeme could usefully have added that this is believed to affect something like glibc 2.9 through 2.22.
I believe that it's possible to get the currently-installed version number using ldd --version However according to Ulrich Drepper the official way is to run the library:
$ locate libc.so
/lib/i386-linux-gnu/libc.so.6
..
$ /lib/i386-linux-gnu/libc.so.6
GNU C Library (Debian GLIBC 2.19-18+deb8u2) stable release version 2.19, by Roland McGrath et al.
..
Compiled on a Linux 3.16.7 system on 2016-01-01.
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]