diff options
Diffstat (limited to 'debian/patches/sudo_minus_1_uid.diff')
| -rw-r--r-- | debian/patches/sudo_minus_1_uid.diff | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/debian/patches/sudo_minus_1_uid.diff b/debian/patches/sudo_minus_1_uid.diff new file mode 100644 index 0000000..167b75d --- /dev/null +++ b/debian/patches/sudo_minus_1_uid.diff @@ -0,0 +1,177 @@ +Description: Treat an ID of -1 as invalid since that means "no change". + Fixes CVE-2019-14287. + Found by Joe Vennix from Apple Information Security. +Origin: upstream +Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2019-14287 +Author: Todd C. Miller <Todd.Miller@sudo.ws> +Reviewed-by: Salvatore Bonaccorso <carnil@debian.org> +Last-Update: 2019-10-10 + +diff -r fcd7a6d8330e lib/util/strtoid.c +--- a/lib/util/strtoid.c Fri Jan 11 13:31:15 2019 -0700 ++++ b/lib/util/strtoid.c Thu Oct 10 09:52:12 2019 -0600 +@@ -1,5 +1,5 @@ + /* +- * Copyright (c) 2013-2016 Todd C. Miller <Todd.Miller@sudo.ws> ++ * Copyright (c) 2013-2019 Todd C. Miller <Todd.Miller@sudo.ws> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above +@@ -47,6 +47,27 @@ + #include "sudo_util.h" + + /* ++ * Make sure that the ID ends with a valid separator char. ++ */ ++static bool ++valid_separator(const char *p, const char *ep, const char *sep) ++{ ++ bool valid = false; ++ debug_decl(valid_separator, SUDO_DEBUG_UTIL) ++ ++ if (ep != p) { ++ /* check for valid separator (including '\0') */ ++ if (sep == NULL) ++ sep = ""; ++ do { ++ if (*ep == *sep) ++ valid = true; ++ } while (*sep++ != '\0'); ++ } ++ debug_return_bool(valid); ++} ++ ++/* + * Parse a uid/gid in string form. + * If sep is non-NULL, it contains valid separator characters (e.g. comma, space) + * If endp is non-NULL it is set to the next char after the ID. +@@ -60,38 +81,35 @@ sudo_strtoid_v1(const char *p, const cha + char *ep; + id_t ret = 0; + long long llval; +- bool valid = false; + debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL) + + /* skip leading space so we can pick up the sign, if any */ + while (isspace((unsigned char)*p)) + p++; +- if (sep == NULL) +- sep = ""; ++ ++ /* While id_t may be 64-bit signed, uid_t and gid_t are 32-bit unsigned. */ + errno = 0; + llval = strtoll(p, &ep, 10); +- if (ep != p) { +- /* check for valid separator (including '\0') */ +- do { +- if (*ep == *sep) +- valid = true; +- } while (*sep++ != '\0'); ++ if ((errno == ERANGE && llval == LLONG_MAX) || llval > (id_t)UINT_MAX) { ++ errno = ERANGE; ++ if (errstr != NULL) ++ *errstr = N_("value too large"); ++ goto done; + } +- if (!valid) { ++ if ((errno == ERANGE && llval == LLONG_MIN) || llval < INT_MIN) { ++ errno = ERANGE; ++ if (errstr != NULL) ++ *errstr = N_("value too small"); ++ goto done; ++ } ++ ++ /* Disallow id -1, which means "no change". */ ++ if (!valid_separator(p, ep, sep) || llval == -1 || llval == (id_t)UINT_MAX) { + if (errstr != NULL) + *errstr = N_("invalid value"); + errno = EINVAL; + goto done; + } +- if (errno == ERANGE) { +- if (errstr != NULL) { +- if (llval == LLONG_MAX) +- *errstr = N_("value too large"); +- else +- *errstr = N_("value too small"); +- } +- goto done; +- } + ret = (id_t)llval; + if (errstr != NULL) + *errstr = NULL; +@@ -106,30 +124,15 @@ sudo_strtoid_v1(const char *p, const cha + { + char *ep; + id_t ret = 0; +- bool valid = false; + debug_decl(sudo_strtoid, SUDO_DEBUG_UTIL) + + /* skip leading space so we can pick up the sign, if any */ + while (isspace((unsigned char)*p)) + p++; +- if (sep == NULL) +- sep = ""; ++ + errno = 0; + if (*p == '-') { + long lval = strtol(p, &ep, 10); +- if (ep != p) { +- /* check for valid separator (including '\0') */ +- do { +- if (*ep == *sep) +- valid = true; +- } while (*sep++ != '\0'); +- } +- if (!valid) { +- if (errstr != NULL) +- *errstr = N_("invalid value"); +- errno = EINVAL; +- goto done; +- } + if ((errno == ERANGE && lval == LONG_MAX) || lval > INT_MAX) { + errno = ERANGE; + if (errstr != NULL) +@@ -142,28 +145,31 @@ sudo_strtoid_v1(const char *p, const cha + *errstr = N_("value too small"); + goto done; + } +- ret = (id_t)lval; +- } else { +- unsigned long ulval = strtoul(p, &ep, 10); +- if (ep != p) { +- /* check for valid separator (including '\0') */ +- do { +- if (*ep == *sep) +- valid = true; +- } while (*sep++ != '\0'); +- } +- if (!valid) { ++ ++ /* Disallow id -1, which means "no change". */ ++ if (!valid_separator(p, ep, sep) || lval == -1) { + if (errstr != NULL) + *errstr = N_("invalid value"); + errno = EINVAL; + goto done; + } ++ ret = (id_t)lval; ++ } else { ++ unsigned long ulval = strtoul(p, &ep, 10); + if ((errno == ERANGE && ulval == ULONG_MAX) || ulval > UINT_MAX) { + errno = ERANGE; + if (errstr != NULL) + *errstr = N_("value too large"); + goto done; + } ++ ++ /* Disallow id -1, which means "no change". */ ++ if (!valid_separator(p, ep, sep) || ulval == UINT_MAX) { ++ if (errstr != NULL) ++ *errstr = N_("invalid value"); ++ errno = EINVAL; ++ goto done; ++ } + ret = (id_t)ulval; + } + if (errstr != NULL) |