openssh/SOURCES/openssh-8.7p1-upstream-cve-2021-41617.patch
2022-03-30 15:54:34 +00:00

26 lines
711 B
Diff

diff --git a/auth.c b/auth.c
index b8d1040d..0134d694 100644
--- a/auth.c
+++ b/auth.c
@@ -56,6 +56,7 @@
# include <paths.h>
#endif
#include <pwd.h>
+#include <grp.h>
#ifdef HAVE_LOGIN_H
#include <login.h>
#endif
@@ -2695,6 +2696,12 @@ subprocess(const char *tag, const char *command,
}
closefrom(STDERR_FILENO + 1);
+ if (geteuid() == 0 &&
+ initgroups(pw->pw_name, pw->pw_gid) == -1) {
+ error("%s: initgroups(%s, %u): %s", tag,
+ pw->pw_name, (u_int)pw->pw_gid, strerror(errno));
+ _exit(1);
+ }
/* Don't use permanently_set_uid() here to avoid fatal() */
if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) != 0) {
error("%s: setresgid %u: %s", tag, (u_int)pw->pw_gid,