31 lines
1.1 KiB
Diff
31 lines
1.1 KiB
Diff
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From 49653743f69658aeeebdb14faf1ab158f1f2cb20 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Fri, 19 Oct 2018 12:12:33 +0200
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Subject: [PATCH] dhcp6: make sure we have enough space for the DHCP6 option
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header
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Fixes CVE-2018-15688:
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https://security-tracker.debian.org/tracker/CVE-2018-15688
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Patch downloaded from upstream commit:
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https://github.com/systemd/systemd/commit/49653743f69658aeeebdb14faf1ab158f1f2cb20
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Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
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---
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src/libsystemd-network/dhcp6-option.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c
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index cbd4bc7a2a3..2806415100c 100644
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--- a/src/libsystemd-network/dhcp6-option.c
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+++ b/src/libsystemd-network/dhcp6-option.c
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@@ -106,7 +106,7 @@ int dhcp6_option_append_ia(uint8_t **buf, size_t *buflen, const DHCP6IA *ia) {
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return -EINVAL;
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}
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- if (*buflen < len)
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+ if (*buflen < offsetof(DHCP6Option, data) + len)
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return -ENOBUFS;
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ia_hdr = *buf;
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