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+From 156a5fd297b61bce31630d7a52c15614bf784843 Mon Sep 17 00:00:00 2001
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+From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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+Date: Sun, 31 May 2020 18:21:09 +0200
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+Subject: [PATCH 1/1] basic/user-util: always use base 10 for user/group
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+ numbers
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+
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+We would parse numbers with base prefixes as user identifiers. For example,
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+"0x2b3bfa0" would be interpreted as UID==45334432 and "01750" would be
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+interpreted as UID==1000. This parsing was used also in cases where either a
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+user/group name or number may be specified. This means that names like
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+0x2b3bfa0 would be ambiguous: they are a valid user name according to our
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+documented relaxed rules, but they would also be parsed as numeric uids.
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+
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+This behaviour is definitely not expected by users, since tools generally only
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+accept decimal numbers (e.g. id, getent passwd), while other tools only accept
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+user names and thus will interpret such strings as user names without even
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+attempting to convert them to numbers (su, ssh). So let's follow suit and only
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+accept numbers in decimal notation. Effectively this means that we will reject
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+such strings as a username/uid/groupname/gid where strict mode is used, and try
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+to look up a user/group with such a name in relaxed mode.
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+
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+Since the function changed is fairly low-level and fairly widely used, this
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+affects multiple tools: loginctl show-user/enable-linger/disable-linger foo',
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+the third argument in sysusers.d, fourth and fifth arguments in tmpfiles.d,
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+etc.
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+
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+Fixes #15985.
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+---
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+ src/basic/user-util.c | 2 +-
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+ src/test/test-user-util.c | 10 ++++++++++
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+ 2 files changed, 11 insertions(+), 1 deletion(-)
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+
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+--- end of commit 156a5fd297b61bce31630d7a52c15614bf784843 ---
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+
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+
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+Add definition of safe_atou32_full() from commit b934ac3d6e7dcad114776ef30ee9098693e7ab7e
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+
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+CVE: CVE-2020-13776
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+
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+Upstream-Status: Backport [https://github.com/systemd/systemd.git]
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+
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+Signed-off-by: Joe Slater <joe.slater@windriver.com>
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+
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+
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+
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+--- git.orig/src/basic/user-util.c
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++++ git/src/basic/user-util.c
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+@@ -49,7 +49,7 @@ int parse_uid(const char *s, uid_t *ret)
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+ assert(s);
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+
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+ assert_cc(sizeof(uid_t) == sizeof(uint32_t));
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+- r = safe_atou32(s, &uid);
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++ r = safe_atou32_full(s, 10, &uid);
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+ if (r < 0)
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+ return r;
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+
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+--- git.orig/src/test/test-user-util.c
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++++ git/src/test/test-user-util.c
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+@@ -48,9 +48,19 @@ static void test_parse_uid(void) {
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+
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+ r = parse_uid("65535", &uid);
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+ assert_se(r == -ENXIO);
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++ assert_se(uid == 100);
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++
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++ r = parse_uid("0x1234", &uid);
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++ assert_se(r == -EINVAL);
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++ assert_se(uid == 100);
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++
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++ r = parse_uid("01234", &uid);
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++ assert_se(r == 0);
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++ assert_se(uid == 1234);
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+
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+ r = parse_uid("asdsdas", &uid);
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+ assert_se(r == -EINVAL);
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++ assert_se(uid == 1234);
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+ }
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+
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+ static void test_uid_ptr(void) {
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+--- git.orig/src/basic/parse-util.h
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++++ git/src/basic/parse-util.h
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+@@ -45,9 +45,13 @@ static inline int safe_atoux16(const cha
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+
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+ int safe_atoi16(const char *s, int16_t *ret);
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+
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+-static inline int safe_atou32(const char *s, uint32_t *ret_u) {
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++static inline int safe_atou32_full(const char *s, unsigned base, uint32_t *ret_u) {
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+ assert_cc(sizeof(uint32_t) == sizeof(unsigned));
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+- return safe_atou(s, (unsigned*) ret_u);
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++ return safe_atou_full(s, base, (unsigned*) ret_u);
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++}
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++
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++static inline int safe_atou32(const char *s, uint32_t *ret_u) {
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++ return safe_atou32_full(s, 0, (unsigned*) ret_u);
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+ }
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+
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+ static inline int safe_atoi32(const char *s, int32_t *ret_i) {
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