Date: Fri, 19 Nov 2021 00:02:34 GMT From: "Bjoern A. Zeeb" <bz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: ab5678c6c0d0 - stable/13 - net80211: proper ssid length check in setmlme_assoc_adhoc() Message-ID: <202111190002.1AJ02Y1r072403@gitrepo.freebsd.org>
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The branch stable/13 has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=ab5678c6c0d0b28feafdb2fd397866d6088f37d8 commit ab5678c6c0d0b28feafdb2fd397866d6088f37d8 Author: Bjoern A. Zeeb <bz@FreeBSD.org> AuthorDate: 2021-10-06 18:41:37 +0000 Commit: Bjoern A. Zeeb <bz@FreeBSD.org> CommitDate: 2021-11-19 00:01:25 +0000 net80211: proper ssid length check in setmlme_assoc_adhoc() A user supplied SSID length is used without proper checks in setmlme_assoc_adhoc() which can lead to copies beyond the end of the user supplied buffer. The ssid is a fixed size array for the ioctl and the argument to setmlme_assoc_adhoc(). In addition to an ssid_len check of 0 also error in case the ssid_len is larger than the size of the ssid array to prevent problems. PR: 254737 Reported by: Tommaso (cutesmilee.research protonmail.com) (cherry picked from commit 526370fb85db4b659cff4625eb2f379acaa4a1a8) (cherry picked from commit 0525ece3554edce14fa68a7fb61078ae2110c44b) --- sys/net80211/ieee80211_ioctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/net80211/ieee80211_ioctl.c b/sys/net80211/ieee80211_ioctl.c index 2fef9ac0084a..419518eb1224 100644 --- a/sys/net80211/ieee80211_ioctl.c +++ b/sys/net80211/ieee80211_ioctl.c @@ -1591,7 +1591,7 @@ setmlme_assoc_adhoc(struct ieee80211vap *vap, ("expected opmode IBSS or AHDEMO not %s", ieee80211_opmode_name[vap->iv_opmode])); - if (ssid_len == 0) + if (ssid_len == 0 || ssid_len > IEEE80211_NWID_LEN) return EINVAL; sr = IEEE80211_MALLOC(sizeof(*sr), M_TEMP,
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