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curl: fix CVE-2023-38545
This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. (From OE-Core rev: 9b0867861a9c053f19bdb99bd6cba44ee5cb64e1) Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com> Signed-off-by: Steve Sakoman <steve@sakoman.com>
This commit is contained in:
Archana Polampalli
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Steve Sakoman
Steve Sakoman
parent
f9694145e9
commit
d1c80c5f4a
133
meta/recipes-support/curl/curl/CVE-2023-38545.patch
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133
meta/recipes-support/curl/curl/CVE-2023-38545.patch
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From fb4415d8aee6c1045be932a34fe6107c2f5ed147 Mon Sep 17 00:00:00 2001
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From: Jay Satiro <raysatiro@yahoo.com>
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Date: Wed, 11 Oct 2023 07:34:19 +0200
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Subject: [PATCH] socks: return error if hostname too long for remote resolve
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Prior to this change the state machine attempted to change the remote
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resolve to a local resolve if the hostname was longer than 255
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characters. Unfortunately that did not work as intended and caused a
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security issue.
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Bug: https://curl.se/docs/CVE-2023-38545.html
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Upstream-Status: Backport [https://github.com/curl/curl/commit/fb4415d8aee6c1045be932a34fe6107c2f5ed147]
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CVE: CVE-2023-38545
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Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
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---
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lib/socks.c | 8 +++---
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tests/data/Makefile.inc | 2 +-
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tests/data/test722 | 64 +++++++++++++++++++++++++++++++++++++++++
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3 files changed, 69 insertions(+), 5 deletions(-)
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create mode 100644 tests/data/test722
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diff --git a/lib/socks.c b/lib/socks.c
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index 95c2b00..8cf694d 100644
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--- a/lib/socks.c
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+++ b/lib/socks.c
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@@ -588,9 +588,9 @@ static CURLproxycode do_SOCKS5(struct Curl_cfilter *cf,
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/* RFC1928 chapter 5 specifies max 255 chars for domain name in packet */
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if(!socks5_resolve_local && hostname_len > 255) {
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- infof(data, "SOCKS5: server resolving disabled for hostnames of "
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- "length > 255 [actual len=%zu]", hostname_len);
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- socks5_resolve_local = TRUE;
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+ failf(data, "SOCKS5: the destination hostname is too long to be "
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+ "resolved remotely by the proxy.");
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+ return CURLPX_LONG_HOSTNAME;
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}
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if(auth & ~(CURLAUTH_BASIC | CURLAUTH_GSSAPI))
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@@ -904,7 +904,7 @@ static CURLproxycode do_SOCKS5(struct Curl_cfilter *cf,
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}
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else {
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socksreq[len++] = 3;
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- socksreq[len++] = (char) hostname_len; /* one byte address length */
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+ socksreq[len++] = (unsigned char) hostname_len; /* one byte length */
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memcpy(&socksreq[len], sx->hostname, hostname_len); /* w/o NULL */
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len += hostname_len;
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}
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diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
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index 7ed03a2..643c9fe 100644
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--- a/tests/data/Makefile.inc
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+++ b/tests/data/Makefile.inc
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@@ -100,7 +100,7 @@ test679 test680 test681 test682 test683 test684 test685 test686 \
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\
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test700 test701 test702 test703 test704 test705 test706 test707 test708 \
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test709 test710 test711 test712 test713 test714 test715 test716 test717 \
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-test718 test719 test720 test721 \
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+test718 test719 test720 test721 test722 \
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\
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test800 test801 test802 test803 test804 test805 test806 test807 test808 \
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test809 test810 test811 test812 test813 test814 test815 test816 test817 \
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diff --git a/tests/data/test722 b/tests/data/test722
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new file mode 100644
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index 0000000..05bcf28
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--- /dev/null
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+++ b/tests/data/test722
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@@ -0,0 +1,64 @@
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+<testcase>
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+<info>
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+<keywords>
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+HTTP
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+HTTP GET
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+SOCKS5
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+SOCKS5h
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+followlocation
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+</keywords>
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+</info>
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+
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+#
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+# Server-side
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+<reply>
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+# The hostname in this redirect is 256 characters and too long (> 255) for
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+# SOCKS5 remote resolve. curl must return error CURLE_PROXY in this case.
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+<data>
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+HTTP/1.1 301 Moved Permanently
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+Location: http://AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA/
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+Content-Length: 0
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+Connection: close
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+
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+</data>
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+</reply>
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+
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+#
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+# Client-side
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+<client>
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+<features>
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+proxy
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+</features>
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+<server>
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+http
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+socks5
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+</server>
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+ <name>
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+SOCKS5h with HTTP redirect to hostname too long
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+ </name>
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+ <command>
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+--no-progress-meter --location --proxy socks5h://%HOSTIP:%SOCKSPORT http://%HOSTIP:%HTTPPORT/%TESTNUMBER
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+</command>
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+</client>
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+
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+#
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+# Verify data after the test has been "shot"
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+<verify>
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+<protocol crlf="yes">
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+GET /%TESTNUMBER HTTP/1.1
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+Host: %HOSTIP:%HTTPPORT
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+User-Agent: curl/%VERSION
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+Accept: */*
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+
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+</protocol>
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+<errorcode>
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+97
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+</errorcode>
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+# the error message is verified because error code CURLE_PROXY (97) may be
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+# returned for any number of reasons and we need to make sure it is
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+# specifically for the reason below so that we know the check is working.
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+<stderr mode="text">
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+curl: (97) SOCKS5: the destination hostname is too long to be resolved remotely by the proxy.
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+</stderr>
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+</verify>
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+</testcase>
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--
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2.40.0
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@@ -19,6 +19,7 @@ SRC_URI = " \
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file://CVE-2023-28321.patch \
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file://CVE-2023-32001.patch \
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file://CVE-2023-28320-fol1.patch \
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file://CVE-2023-38545.patch \
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"
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SRC_URI[sha256sum] = "0a381cd82f4d00a9a334438b8ca239afea5bfefcfa9a1025f2bf118e79e0b5f0"
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