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| author | Christian Göttsche <cgzones@googlemail.com> | 2023-01-30 17:56:58 +0100 |
|---|---|---|
| committer | Christian Göttsche <cgzones@googlemail.com> | 2023-02-28 15:13:15 +0100 |
| commit | bcba17939e1b1a568cd4a764534cde74d37078cc (patch) | |
| tree | 4f3630f53cd52c2afa59435f5d36db260c1bf4a1 /modules/pam_access | |
| parent | 87ff7a12a55c38873905636eb8d29b4542d828f5 (diff) | |
| download | pam-bcba17939e1b1a568cd4a764534cde74d37078cc.tar.gz pam-bcba17939e1b1a568cd4a764534cde74d37078cc.tar.bz2 pam-bcba17939e1b1a568cd4a764534cde74d37078cc.zip | |
modules: make use of secure memory erasure
Use empty initialization of structs to minimize the memset() usage, to
reduce the amount of calls which are not sensitive.
Non trivial changes:
- pam_env:
* erase environment variables where possible
- pam_exec:
* erase responce on error
* erase auth token
- pam_pwhistory:
* erase buffers containing old passwords
- pam_selinux: skip overwriting data structure consisting of only
pointers to insensitive data, which also gets free'd afterwards (so
it currently does not protect against double-free or use-after-free on
the member pointers)
- pam_unix: erase cipher data in more places
- pam_userdb: erase password hashes
Diffstat (limited to 'modules/pam_access')
| -rw-r--r-- | modules/pam_access/pam_access.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/modules/pam_access/pam_access.c b/modules/pam_access/pam_access.c index f7b47227..f70b7e49 100644 --- a/modules/pam_access/pam_access.c +++ b/modules/pam_access/pam_access.c @@ -663,7 +663,7 @@ static int group_match (pam_handle_t *pamh, const char *tok, const char* usr, int debug) { - char grptok[BUFSIZ]; + char grptok[BUFSIZ] = {}; if (debug) pam_syslog (pamh, LOG_DEBUG, @@ -673,7 +673,6 @@ group_match (pam_handle_t *pamh, const char *tok, const char* usr, return NO; /* token is received under the format '(...)' */ - memset(grptok, 0, BUFSIZ); strncpy(grptok, tok + 1, strlen(tok) - 2); if (pam_modutil_user_in_group_nam_nam(pamh, usr, grptok)) |