63 lines
1.7 KiB
Diff
63 lines
1.7 KiB
Diff
--- openssh-4.5p1/misc.c
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+++ openssh-4.5p1/misc.c
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@@ -186,6 +186,29 @@
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return (old);
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}
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+struct passwd *getpwuid_wh(uid_t uid) {
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+ /* Return the password structure by lookup of the username in $ENV{USER},
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+ but only when the UID matches a lookup-by-uid so as to not allow using
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+ another users' .ssh files in case this function be used in superuser
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+ context. */
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+
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+ const char *user = getenv("USER");
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+ struct passwd *pe_nam, *pe_uid;
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+
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+ if(user == NULL || (pe_nam = getpwnam(user)) == NULL) {
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+ return getpwuid(uid);
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+ }
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+
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+ pe_nam = pwcopy(pe_nam);
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+ if((pe_uid = getpwuid(uid)) == NULL || pe_nam->pw_uid != pe_uid->pw_uid) {
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+ free(pe_nam);
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+ return pe_uid;
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+ }
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+
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+ free(pe_nam); // - need to return a non-pwcopy struct
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+ return getpwnam(user);
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+}
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+
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struct passwd *
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pwcopy(struct passwd *pw)
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{
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@@ -524,7 +547,7 @@
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user[slash] = '\0';
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if ((pw = getpwnam(user)) == NULL)
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fatal("tilde_expand_filename: No such user %s", user);
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- } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */
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+ } else if ((pw = getpwuid_wh(uid)) == NULL) /* ~/path */
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fatal("tilde_expand_filename: No such uid %d", uid);
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if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret))
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--- openssh-4.5p1/misc.h
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+++ openssh-4.5p1/misc.h
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@@ -34,6 +34,7 @@
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char *tohex(const void *, size_t);
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void sanitise_stdfd(void);
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+struct passwd *getpwuid_wh(uid_t);
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struct passwd *pwcopy(struct passwd *);
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typedef struct arglist arglist;
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--- openssh-4.5p1/ssh.c
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+++ openssh-4.5p1/ssh.c
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@@ -249,7 +249,7 @@
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}
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#endif
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/* Get user data. */
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- pw = getpwuid(original_real_uid);
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+ pw = getpwuid_wh(original_real_uid);
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if (!pw) {
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logit("You don't exist, go away!");
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exit(255);
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