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Resolves: CVE-2019-5436 - TFTP receive buffer overflow

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This commit is contained in:
Kamil Dudka 2019-05-22 14:02:54 +02:00
parent 7924399c12
commit 3806eb7181
2 changed files with 36 additions and 0 deletions
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31
0017-curl-7.64.0-CVE-2019-5436.patch Normal file
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@ -0,0 +1,31 @@
From 55a27027d5f024a0ecc2c23c81ed99de6192c9f3 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Fri, 3 May 2019 22:20:37 +0200
Subject: [PATCH] tftp: use the current blksize for recvfrom()
bug: https://curl.haxx.se/docs/CVE-2019-5436.html
Reported-by: l00p3r on hackerone
CVE-2019-5436
Upstream-commit: 2576003415625d7b5f0e390902f8097830b82275
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/tftp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/tftp.c b/lib/tftp.c
index 269b3cd..4f2a131 100644
--- a/lib/tftp.c
+++ b/lib/tftp.c
@@ -1005,7 +1005,7 @@ static CURLcode tftp_connect(struct connectdata *conn, bool *done)
state->sockfd = state->conn->sock[FIRSTSOCKET];
state->state = TFTP_STATE_START;
state->error = TFTP_ERR_NONE;
- state->blksize = TFTP_BLKSIZE_DEFAULT;
+ state->blksize = blksize;
state->requested_blksize = blksize;
((struct sockaddr *)&state->local_addr)->sa_family =
--
2.20.1

5
curl.spec
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@ -23,6 +23,9 @@ Patch5: 0005-curl-7.64.0-expire-in-verbose-msgs.patch
# fix integer overflows in curl_url_set() (CVE-2019-5435)
Patch16: 0016-curl-7.64.0-CVE-2019-5435.patch
# TFTP receive buffer overflow (CVE-2019-5436)
Patch17: 0017-curl-7.64.0-CVE-2019-5436.patch
# patch making libcurl multilib ready
Patch101: 0101-curl-7.32.0-multilib.patch
@ -199,6 +202,7 @@ be installed.
# upstream patches
%patch16 -p1
%patch17 -p1
# make tests/*.py use Python 3
sed -e '1 s|^#!/.*python|#!%{__python3}|' -i tests/*.py
@ -360,6 +364,7 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
%changelog
* Wed May 22 2019 Kamil Dudka <kdudka@redhat.com> - 7.64.0-7
- TFTP receive buffer overflow (CVE-2019-5436)
- fix integer overflows in curl_url_set() (CVE-2019-5435)
* Mon Mar 25 2019 Kamil Dudka <kdudka@redhat.com> - 7.64.0-6