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security/strongswan: fix CVE-2023-41913

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This is urgent change adding official patch
https://download.strongswan.org/security/CVE-2023-41913/strongswan-5.9.7-5.9.11_charon_tkm_dh_len.patch
that is identical to the change made for strongswan-5.9.12:
96d7937189

It is upto port maintainer to review and maybe upgrade the port to 5.9.12

Obtained from:	strongSwan
Security:	CVE-2023-41913
This commit is contained in:
Eugene Grosbein 2023-11-24 15:03:00 +07:00
parent df6911fe41
commit 4e2c0382dd
No known key found for this signature in database
GPG Key ID: C8960FF146564C9A
2 changed files with 43 additions and 1 deletions
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2
security/strongswan/Makefile
View File

@ -1,6 +1,6 @@
PORTNAME= strongswan
DISTVERSION= 5.9.11
PORTREVISION= 2
PORTREVISION= 3
CATEGORIES= security net-vpn
MASTER_SITES= https://download.strongswan.org/ \
https://download2.strongswan.org/

42
security/strongswan/files/patch-src_swanctl_charon-tkm_src_tkm_tkm_diffie_hellman.c Normal file
View File

@ -0,0 +1,42 @@
From 027421cbd2e6e628f5f959c74d722afadc477485 Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Tue, 11 Jul 2023 12:12:25 +0200
Subject: [PATCH] charon-tkm: Validate DH public key to fix potential buffer
overflow
Seems this was forgotten in the referenced commit and actually could lead
to a buffer overflow. Since charon-tkm is untrusted this isn't that
much of an issue but could at least be easily exploited for a DoS attack
as DH public values are set when handling IKE_SA_INIT requests.
Fixes: 0356089d0f94 ("diffie-hellman: Verify public DH values in backends")
Fixes: CVE-2023-41913
---
src/charon-tkm/src/tkm/tkm_diffie_hellman.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/charon-tkm/src/tkm/tkm_diffie_hellman.c b/src/charon-tkm/src/tkm/tkm_diffie_hellman.c
index 2b2d103d03e9..6999ad360d7e 100644
--- src/charon-tkm/src/tkm/tkm_diffie_hellman.c
+++ src/charon-tkm/src/tkm/tkm_diffie_hellman.c
@@ -70,11 +70,16 @@ METHOD(key_exchange_t, get_shared_secret, bool,
return TRUE;
}
-
METHOD(key_exchange_t, set_public_key, bool,
private_tkm_diffie_hellman_t *this, chunk_t value)
{
dh_pubvalue_type othervalue;
+
+ if (!key_exchange_verify_pubkey(this->group, value) ||
+ value.len > sizeof(othervalue.data))
+ {
+ return FALSE;
+ }
othervalue.size = value.len;
memcpy(&othervalue.data, value.ptr, value.len);
--
2.34.1