mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-26 06:18:07 -05:00
85267efb2a
* gnu/packages/patches/libssh-CVE-2014-0017.patch: Delete file. * gnu/packages/patches/libssh-0.6.5-CVE-2016-0739.patch: New file. * gnu-system.am (dist_patch_DATA): Adjust accordingly. * gnu/packages/ssh.scm (libssh): Update to 0.7.3. (libssh-0.5): Rename to... (libssh-0.6): ... this. Update to 0.6.5. [source]: Add patch for CVE-2016-0739. (guile-ssh)[inputs]: Use libssh-0.6. Modified-By: Mark H Weaver <mhw@netris.org>
77 lines
2.2 KiB
Diff
77 lines
2.2 KiB
Diff
Fix CVE-2016-0739 (Weak Diffie-Hellman secret generation in
|
|
dh_generate_x() and dh_generate_y()).
|
|
|
|
"Due to a byte/bit confusion, the DH secret was too short. This file was
|
|
completely reworked and will be commited in a future version."
|
|
Source:
|
|
https://git.libssh.org/projects/libssh.git/commit/?id=f8d0026c65fc8a55748ae481758e2cf376c26c86
|
|
|
|
This patch was created by upstream for libssh-0.7.3, but applied without
|
|
modification to libssh-0.6.3 by Debian. In Guix, we apply it without
|
|
modification to libssh-0.6.5.
|
|
|
|
References:
|
|
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-0739
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-0739
|
|
https://security-tracker.debian.org/tracker/CVE-2016-0739
|
|
|
|
---
|
|
src/dh.c | 22 +++++++++++++++++-----
|
|
1 file changed, 17 insertions(+), 5 deletions(-)
|
|
|
|
diff --git a/src/dh.c b/src/dh.c
|
|
index e489a1d..d27b66e 100644
|
|
--- a/src/dh.c
|
|
+++ b/src/dh.c
|
|
@@ -227,15 +227,21 @@ void ssh_crypto_finalize(void) {
|
|
}
|
|
|
|
int dh_generate_x(ssh_session session) {
|
|
+ int keysize;
|
|
+ if (session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1) {
|
|
+ keysize = 1023;
|
|
+ } else {
|
|
+ keysize = 2047;
|
|
+ }
|
|
session->next_crypto->x = bignum_new();
|
|
if (session->next_crypto->x == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
#ifdef HAVE_LIBGCRYPT
|
|
- bignum_rand(session->next_crypto->x, 128);
|
|
+ bignum_rand(session->next_crypto->x, keysize);
|
|
#elif defined HAVE_LIBCRYPTO
|
|
- bignum_rand(session->next_crypto->x, 128, 0, -1);
|
|
+ bignum_rand(session->next_crypto->x, keysize, -1, 0);
|
|
#endif
|
|
|
|
/* not harder than this */
|
|
@@ -248,15 +254,21 @@ int dh_generate_x(ssh_session session) {
|
|
|
|
/* used by server */
|
|
int dh_generate_y(ssh_session session) {
|
|
- session->next_crypto->y = bignum_new();
|
|
+ int keysize;
|
|
+ if (session->next_crypto->kex_type == SSH_KEX_DH_GROUP1_SHA1) {
|
|
+ keysize = 1023;
|
|
+ } else {
|
|
+ keysize = 2047;
|
|
+ }
|
|
+ session->next_crypto->y = bignum_new();
|
|
if (session->next_crypto->y == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
#ifdef HAVE_LIBGCRYPT
|
|
- bignum_rand(session->next_crypto->y, 128);
|
|
+ bignum_rand(session->next_crypto->y, keysize);
|
|
#elif defined HAVE_LIBCRYPTO
|
|
- bignum_rand(session->next_crypto->y, 128, 0, -1);
|
|
+ bignum_rand(session->next_crypto->y, keysize, -1, 0);
|
|
#endif
|
|
|
|
/* not harder than this */
|
|
--
|
|
cgit v0.12
|
|
|