OSEC

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From: Charles M. Hannum (rootIHACK.NET)
Date: Mon Feb 12 2001 - 21:10:29 CST

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    The newly announced FreSSH, when there is no /dev/urandom available,
    uses a `fallback' to seed its PRNG that consists of:

                            int numfs, whichfs = 0;
                            struct statfs *mntbuf;
                            numfs = getmntinfo(&mntbuf, MNT_NOWAIT);
                            while (whichfs < numfs) {
                                    ssh_rand_feed((void *) mntbuf,
                                        sizeof(struct statfs));
                                    memset(mntbuf, 0, sizeof(struct statfs));
                                    mntbuf++;
                                    whichfs++;
                            }

    I don't think I need to tell people on this list why that's absolutely
    horrible; I'm just pointing out that code is still released today with
    crap like this. I would have thought we'd learned this lesson years
    ago with the AFS, krb4, Netscape, et al vulnerabilities.