File pure-ftpd-malloc-limit.patch of Package pure-ftpd
diff -Nur pure-ftpd-1.0.49.orig/man/pure-ftpd.8.in pure-ftpd-1.0.49/man/pure-ftpd.8.in
--- pure-ftpd-1.0.49.orig/man/pure-ftpd.8.in 2019-03-25 16:48:42.000000000 +0100
+++ pure-ftpd-1.0.49/man/pure-ftpd.8.in 2020-04-27 16:36:01.574470331 +0200
@@ -9,7 +9,7 @@
pure\-ftpd \- simple File Transfer Protocol server
.SH "SYNOPSIS"
-.B pure\-ftpd [\-0] [\-1] [\-2 cert_file[,key_file]] [\-3 certd_socket] [\-4] [\-6] [\-a gid] [\-A] [\-b] [\-B] [\-c clients] [\-C cnx/ip] [\-d [\-d]] [\-D] [\-e] [\-E] [\-f facility] [\-F fortunes file] [\-g pidfile] [\-G] [\-H] [\-i] [\-I] [\-j] [\-J ciphers] [\-k percentage] [\-K] [\-l authentication[:config file]] [\-L max files:max depth] [\-m maxload] [\-M] [\-n maxfiles:maxsize] [\-N] [\-o] [\-O format:log file] [\-p first:last] [\-P ip address or host name] [\-q upload:download ratio] [\-Q upload:download ratio] [\-r] [\-R] [\-s] [\-S [address,][port]] [\-t upload bandwidth:download bandwidth] [\-T upload bandwidth:download bandwidth] [\-u uid] [\-U umask files:umask dirs] [\-v bonjour name] [\-V ip address] [\-w] [\-W] [\-x] [\-X] [\-y max user sessions:max anon sessions] [\-Y tls behavior] [\-z] [\-Z]
+.B pure\-ftpd [\-0] [\-1] [\-2 cert_file[,key_file]] [\-3 certd_socket] [\-4] [\-6] [\-a gid] [\-A] [\-b] [\-B] [\-c clients] [\-C cnx/ip] [\-d [\-d]] [\-D] [\-e] [\-E] [\-f facility] [\-F fortunes file] [\-g pidfile] [\-G] [\-H] [\-i] [\-I] [\-j] [\-J ciphers] [\-k percentage] [\-K] [\-l authentication[:config file]] [\-L max files:max depth:[:maxmemory]] [\-m maxload] [\-M] [\-n maxfiles:maxsize] [\-N] [\-o] [\-O format:log file] [\-p first:last] [\-P ip address or host name] [\-q upload:download ratio] [\-Q upload:download ratio] [\-r] [\-R] [\-s] [\-S [address,][port]] [\-t upload bandwidth:download bandwidth] [\-T upload bandwidth:download bandwidth] [\-u uid] [\-U umask files:umask dirs] [\-v bonjour name] [\-V ip address] [\-w] [\-W] [\-x] [\-X] [\-y max user sessions:max anon sessions] [\-Y tls behavior] [\-z] [\-Z]
.br
Alternative style:
@@ -337,11 +337,12 @@
.I README.MySQL
files for info about the built\-in LDAP and SQL directory support.
.TP
-.B \-L max files:max depth
+.B \-L max files:max depth[:max memory limit]
Avoid denial\-of\-service attacks by limiting the number of displayed files
-in a 'ls' and the maximum depth of a recursive 'ls'. Defaults are 2000:5
-(2000 files displayed for a single 'ls' and walk through 5 subdirectories
-max).
+in a 'ls', the maximum depth of a recursive 'ls' and optional memory limit
+for globbing in kilobytes. Defaults are 2000:5:512 (2000 files displayed
+for a single 'ls', walk through 5 subdirectories max and limit allocated
+memory for evaluation wildcard characters by 'ls' to 524288 bytes).
.TP
.B \-m load
Do not allow anonymous users to download files if the load is above
diff -Nur pure-ftpd-1.0.49.orig/src/bsd-glob.c pure-ftpd-1.0.49/src/bsd-glob.c
--- pure-ftpd-1.0.49.orig/src/bsd-glob.c 2019-04-02 16:00:39.000000000 +0200
+++ pure-ftpd-1.0.49/src/bsd-glob.c 2020-04-27 16:33:21.997238426 +0200
@@ -107,9 +107,6 @@
#define M_SET META('[')
#define ismeta(c) (((c)&M_QUOTE) != 0)
-#ifndef GLOB_LIMIT_MALLOC
-# define GLOB_LIMIT_MALLOC 65536
-#endif
#ifndef GLOB_MAX_STARS
# define GLOB_MAX_STARS 3
#endif
@@ -160,7 +157,7 @@
static int
glob_(const char *pattern, int flags, int (*errfunc)(const char *, int),
- glob_t *pglob, unsigned long maxfiles, int maxdepth)
+ glob_t *pglob, unsigned long maxfiles, int maxdepth, unsigned long maxmemory)
{
const unsigned char *patnext;
int c;
@@ -172,6 +169,7 @@
}
pglob->gl_maxdepth = maxdepth;
pglob->gl_maxfiles = maxfiles;
+ pglob->gl_maxmemory = maxmemory;
patnext = (unsigned char *) pattern;
if (!(flags & GLOB_APPEND)) {
pglob->gl_pathc = 0;
@@ -226,15 +224,15 @@
glob(const char *pattern, int flags, int (*errfunc) (const char *, int),
glob_t * pglob)
{
- return glob_(pattern, flags, errfunc, pglob, (unsigned long) -1, 0);
+ return glob_(pattern, flags, errfunc, pglob, (unsigned long) -1, 0, GLOB_LIMIT_MALLOC);
}
int
sglob(char *pattern, int flags, int (*errfunc) (const char *, int),
- glob_t * pglob, unsigned long maxfiles, int maxdepth)
+ glob_t * pglob, unsigned long maxfiles, int maxdepth, unsigned long maxmemory)
{
simplify(pattern);
- return glob_(pattern, flags, errfunc, pglob, maxfiles, maxdepth);
+ return glob_(pattern, flags, errfunc, pglob, maxfiles, maxdepth, maxmemory);
}
/*
@@ -766,7 +764,7 @@
statv[pglob->gl_offs + pglob->gl_pathc] = NULL;
} else {
limitp->glim_malloc += sizeof(**statv);
- if (limitp->glim_malloc >= GLOB_LIMIT_MALLOC) {
+ if (limitp->glim_malloc >= pglob->gl_maxmemory) {
errno = 0;
return GLOB_NOSPACE;
}
@@ -793,7 +791,7 @@
}
pathv[pglob->gl_offs + pglob->gl_pathc] = NULL;
- if ((newn * sizeof(*pathv)) + limitp->glim_malloc > GLOB_LIMIT_MALLOC) {
+ if ((newn * sizeof(*pathv)) + limitp->glim_malloc > pglob->gl_maxmemory) {
errno = 0;
return GLOB_NOSPACE;
}
diff -Nur pure-ftpd-1.0.49.orig/src/bsd-glob.h pure-ftpd-1.0.49/src/bsd-glob.h
--- pure-ftpd-1.0.49.orig/src/bsd-glob.h 2018-09-19 23:53:05.000000000 +0200
+++ pure-ftpd-1.0.49/src/bsd-glob.h 2020-04-27 16:33:22.001238457 +0200
@@ -38,6 +38,7 @@
typedef struct {
unsigned long gl_maxfiles; /* Maximum number of results */
int gl_maxdepth; /* Maximum depth */
+ unsigned long gl_maxmemory; /* Maximum memory allocated */
int gl_pathc; /* Count of total paths so far. */
int gl_matchc; /* Count of paths matching pattern. */
int gl_offs; /* Reserved at beginning of gl_pathv. */
@@ -84,14 +85,14 @@
#ifdef DISABLE_GLOBBING
# define glob(A, B, C, D) (GLOB_NOSYS)
-# define sglob(A, B, C, D, E, F) (GLOB_NOSYS)
+# define sglob(A, B, C, D, E, F, G) (GLOB_NOSYS)
# define globfree(A) (void) 0
#else
# ifndef USELESS_FOR_PUREFTPD
int glob(const char *, int, int (*)(const char *, int), glob_t *);
# endif
int sglob(char *, int, int (*)(const char *, int),
- glob_t *, unsigned long, int);
+ glob_t *, unsigned long, int, unsigned long);
void globfree(glob_t *);
#endif
diff -Nur pure-ftpd-1.0.49.orig/src/ftpd.c pure-ftpd-1.0.49/src/ftpd.c
--- pure-ftpd-1.0.49.orig/src/ftpd.c 2019-04-02 16:00:40.000000000 +0200
+++ pure-ftpd-1.0.49/src/ftpd.c 2020-04-27 16:33:22.001238457 +0200
@@ -5923,11 +5923,14 @@
}
case 'L': {
int ret;
+ unsigned int tmp_glob_memory;
- ret = sscanf(optarg, "%u:%u", &max_ls_files, &max_ls_depth);
- if (ret != 2 ||
- max_ls_files < 1U || max_ls_depth < 1U) {
+ ret = sscanf(optarg, "%u:%u:%u", &max_ls_files, &max_ls_depth, &tmp_glob_memory);
+ if (ret < 2 || ret > 3 ||
+ max_ls_files < 1U || max_ls_depth < 1U || tmp_glob_memory < 1U) {
die(421, LOG_ERR, MSG_CONF_ERR ": " MSG_ILLEGAL_LS_LIMITS ": %s" , optarg);
+ } else if (ret == 3) {
+ max_glob_memory = tmp_glob_memory * 1024;
}
break;
}
diff -Nur pure-ftpd-1.0.49.orig/src/ftpd.h pure-ftpd-1.0.49/src/ftpd.h
--- pure-ftpd-1.0.49.orig/src/ftpd.h 2019-03-25 16:48:42.000000000 +0100
+++ pure-ftpd-1.0.49/src/ftpd.h 2020-04-27 16:33:22.001238457 +0200
@@ -541,6 +541,9 @@
#ifndef DEFAULT_MAX_LS_DEPTH
# define DEFAULT_MAX_LS_DEPTH 5U
#endif
+#ifndef GLOB_LIMIT_MALLOC
+# define GLOB_LIMIT_MALLOC 524288U /* Memory limit for globbing */
+#endif
#ifndef GLOB_TIMEOUT
# define GLOB_TIMEOUT 17 /* Max user time for a 'ls' to complete */
#endif
diff -Nur pure-ftpd-1.0.49.orig/src/globals.h pure-ftpd-1.0.49/src/globals.h
--- pure-ftpd-1.0.49.orig/src/globals.h 2019-03-25 17:58:02.000000000 +0100
+++ pure-ftpd-1.0.49/src/globals.h 2020-04-27 16:33:22.001238457 +0200
@@ -77,6 +77,7 @@
GLOBAL0(int allow_anon_mkdir);
GLOBAL(unsigned int max_ls_files, DEFAULT_MAX_LS_FILES);
GLOBAL(unsigned int max_ls_depth, DEFAULT_MAX_LS_DEPTH);
+GLOBAL(unsigned int max_glob_memory, GLOB_LIMIT_MALLOC);
GLOBAL0(char *fortunes_file);
GLOBAL0(char host[NI_MAXHOST]);
GLOBAL0(int replycode);
diff -Nur pure-ftpd-1.0.49.orig/src/ls.c pure-ftpd-1.0.49/src/ls.c
--- pure-ftpd-1.0.49.orig/src/ls.c 2019-04-02 16:00:40.000000000 +0200
+++ pure-ftpd-1.0.49/src/ls.c 2020-04-27 16:33:22.001238457 +0200
@@ -857,7 +857,7 @@
memset(&g, 0, sizeof g);
a = sglob(arg,
opt_a ? (GLOB_PERIOD | GLOB_LIMIT) : GLOB_LIMIT,
- NULL, &g, max_ls_files + 2, max_ls_depth * 2);
+ NULL, &g, max_ls_files + 2, max_ls_depth * 2, max_glob_memory);
alarm(0);
if (a == 0) {
char **path;
