From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- scripts/ssl-common.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 scripts/ssl-common.h (limited to 'scripts/ssl-common.h') diff --git a/scripts/ssl-common.h b/scripts/ssl-common.h new file mode 100644 index 000000000..2db0e1811 --- /dev/null +++ b/scripts/ssl-common.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ +/* + * SSL helper functions shared by sign-file and extract-cert. + */ + +static void drain_openssl_errors(int l, int silent) +{ + const char *file; + char buf[120]; + int e, line; + + if (ERR_peek_error() == 0) + return; + if (!silent) + fprintf(stderr, "At main.c:%d:\n", l); + + while ((e = ERR_peek_error_line(&file, &line))) { + ERR_error_string(e, buf); + if (!silent) + fprintf(stderr, "- SSL %s: %s:%d\n", buf, file, line); + ERR_get_error(); + } +} + +#define ERR(cond, fmt, ...) \ + do { \ + bool __cond = (cond); \ + drain_openssl_errors(__LINE__, 0); \ + if (__cond) { \ + errx(1, fmt, ## __VA_ARGS__); \ + } \ + } while (0) -- cgit v1.3.1