From d80cc39558ec7e596d594d1aadc4df81262611f8 Mon Sep 17 00:00:00 2001 From: Luca Boccassi Date: Sun, 16 Jul 2023 01:10:47 +0100 Subject: [PATCH] bus: add some minimal bounds check on signatures CID#1491292 CID#1491291 CID#1491290 CID#1491289 CID#1491284 CID#1491281 CID#1491280 CID#1491278 Conflict:NA Reference:https://github.com/systemd/systemd-stable/commit/d80cc39558ec7e596d594d1aadc4df81262611f8 --- src/busctl/busctl.c | 5 ++++- src/libsystemd/sd-bus/bus-message.c | 6 ++++++ 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/src/busctl/busctl.c b/src/busctl/busctl.c index 72eed36335..c1a0479015 100644 --- a/src/busctl/busctl.c +++ b/src/busctl/busctl.c @@ -1627,8 +1627,11 @@ static int message_append_cmdline(sd_bus_message *m, const char *signature, char p--; r = signature_element_length(signature, &k); - if (r < 0) + if (r < 0 || k < 2) { + if (r >= 0 && k < 2) + r = -ERANGE; return log_error_errno(r, "Invalid struct/dict entry signature: %m"); + } { char s[k-1]; diff --git a/src/libsystemd/sd-bus/bus-message.c b/src/libsystemd/sd-bus/bus-message.c index 3cf1419a14..f1cf6a8cc4 100644 --- a/src/libsystemd/sd-bus/bus-message.c +++ b/src/libsystemd/sd-bus/bus-message.c @@ -2027,6 +2027,8 @@ _public_ int sd_bus_message_appendv( r = signature_element_length(t, &k); if (r < 0) return r; + if (k < 2) + return -ERANGE; { char s[k - 1]; @@ -3470,6 +3472,8 @@ _public_ int sd_bus_message_readv( r = signature_element_length(t, &k); if (r < 0) return r; + if (k < 2) + return -ERANGE; { char s[k - 1]; @@ -3650,6 +3654,8 @@ _public_ int sd_bus_message_skip(sd_bus_message *m, const char *types) { r = signature_element_length(types, &k); if (r < 0) return r; + if (k < 2) + return -ERANGE; { char s[k-1]; -- 2.39.1