diff options
Diffstat (limited to 'source/n/biff+comsat/biff+comsat.badutmp.diff')
| -rw-r--r-- | source/n/biff+comsat/biff+comsat.badutmp.diff | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/source/n/biff+comsat/biff+comsat.badutmp.diff b/source/n/biff+comsat/biff+comsat.badutmp.diff new file mode 100644 index 00000000..2cb79b59 --- /dev/null +++ b/source/n/biff+comsat/biff+comsat.badutmp.diff @@ -0,0 +1,43 @@ +--- ./comsat/comsat.c.orig 2004-06-21 13:50:09.000000000 -0700 ++++ ./comsat/comsat.c 2004-06-21 13:50:52.000000000 -0700 +@@ -69,6 +69,8 @@ + static int debug = 0; + #define dsyslog if (debug) syslog + ++ ++ + #define MAXIDLE 120 + + static char hostname[MAXHOSTNAMELEN]; +@@ -331,6 +333,7 @@ + char line[sizeof(utp->ut_line) + 1]; /* tty name */ + const char *cr; /* line delimiter */ + sigset_t sigset; /* scratch signal mask */ ++ struct passwd *pwbuf; /* passwd information buffer */ + + #ifdef USER_PROCESS + if (utp->ut_type != USER_PROCESS) { +@@ -371,6 +374,23 @@ + dsyslog(LOG_DEBUG, "%s: wrong mode on %s", name, tty); + return; + } ++ /* ++ * Ensure the tty is owned by the uid of 'name' to prevent old ++ * unremoved utmp records referring to user 'x' leading to ++ * biffage of user 'x''s email to user 'y' where user 'y' is ++ * logged onto the same terminal that user 'x' previously ++ * used. T.Crane, 8th June 2004. ++ */ ++ if ((pwbuf=getpwnam(name))==NULL) { ++ syslog(LOG_ERR, "get pwname(%s) failed", name); ++ exit(1); ++ } ++ if (pwbuf->pw_uid != stb.st_uid) { ++ dsyslog(LOG_DEBUG, "Warning: tty uid %d != uid %d for %s on %s\n", ++ stb.st_uid, pwbuf->pw_uid, name, tty); ++ return; ++ } ++ + dsyslog(LOG_DEBUG, "notify %s on %s\n", name, tty); + + /* |