From 0c8da1bead8ffaf270b4b723ead2c517371405d7 Mon Sep 17 00:00:00 2001 From: Ariadne Conill Date: Sun, 3 Apr 2022 12:14:33 +0000 Subject: [PATCH 1/2] libbb: sockaddr2str: ensure only printable characters are returned for the hostname part CVE: CVE-2022-28391 Upstream-Status: Pending Signed-off-by: Ariadne Conill Signed-off-by: Steve Sakoman --- libbb/xconnect.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libbb/xconnect.c b/libbb/xconnect.c index 0e0b247b8..02c061e67 100644 --- a/libbb/xconnect.c +++ b/libbb/xconnect.c @@ -497,8 +497,9 @@ static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags) ); if (rc) return NULL; + /* ensure host contains only printable characters */ if (flags & IGNORE_PORT) - return xstrdup(host); + return xstrdup(printable_string(host)); #if ENABLE_FEATURE_IPV6 if (sa->sa_family == AF_INET6) { if (strchr(host, ':')) /* heh, it's not a resolved hostname */ @@ -509,7 +510,7 @@ static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags) #endif /* For now we don't support anything else, so it has to be INET */ /*if (sa->sa_family == AF_INET)*/ - return xasprintf("%s:%s", host, serv); + return xasprintf("%s:%s", printable_string(host), serv); /*return xstrdup(host);*/ } -- 2.35.1