Patch from David Howells to fix overflow on 32-bit X.509 certs (rhbz 861322)
This commit is contained in:
Josh Boyer
parent
386d01e31a
commit
20accb4a0e
@ -62,7 +62,7 @@ Summary: The Linux kernel
|
|||||||
# For non-released -rc kernels, this will be appended after the rcX and
|
# For non-released -rc kernels, this will be appended after the rcX and
|
||||||
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
|
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
|
||||||
#
|
#
|
||||||
%global baserelease 1
|
%global baserelease 2
|
||||||
%global fedora_build %{baserelease}
|
%global fedora_build %{baserelease}
|
||||||
|
|
||||||
# base_sublevel is the kernel version we're starting with and patching
|
# base_sublevel is the kernel version we're starting with and patching
|
||||||
@ -2320,6 +2320,9 @@ fi
|
|||||||
# ||----w |
|
# ||----w |
|
||||||
# || ||
|
# || ||
|
||||||
%changelog
|
%changelog
|
||||||
|
* Tue Oct 02 2012 Josh Boyer <jwboyer@redhat.com>
|
||||||
|
- Patch from David Howells to fix overflow on 32-bit X.509 certs (rhbz 861322)
|
||||||
|
|
||||||
* Tue Oct 2 2012 Peter Robinson <pbrobinson@fedoraproject.org>
|
* Tue Oct 2 2012 Peter Robinson <pbrobinson@fedoraproject.org>
|
||||||
- Update ARM configs for 3.6 final
|
- Update ARM configs for 3.6 final
|
||||||
- Add highbank SATA driver for stability
|
- Add highbank SATA driver for stability
|
||||||
|
|||||||
@ -9151,3 +9151,177 @@ index 83eb505..2beea56 100644
|
|||||||
--
|
--
|
||||||
1.7.11.4
|
1.7.11.4
|
||||||
|
|
||||||
|
The current choice of lifetime for the autogenerated X.509 of 100 years,
|
||||||
|
putting the validTo date in 2112, causes problems on 32-bit systems where a
|
||||||
|
32-bit time_t wraps in 2106. 64-bit x86_64 systems seem to be unaffected.
|
||||||
|
|
||||||
|
This can result in something like:
|
||||||
|
|
||||||
|
Loading module verification certificates
|
||||||
|
X.509: Cert 6e03943da0f3b015ba6ed7f5e0cac4fe48680994 has expired
|
||||||
|
MODSIGN: Problem loading in-kernel X.509 certificate (-127)
|
||||||
|
|
||||||
|
Or:
|
||||||
|
|
||||||
|
X.509: Cert 6e03943da0f3b015ba6ed7f5e0cac4fe48680994 is not yet valid
|
||||||
|
MODSIGN: Problem loading in-kernel X.509 certificate (-129)
|
||||||
|
|
||||||
|
Instead of turning the dates into time_t values and comparing, turn the system
|
||||||
|
clock and the ASN.1 dates into tm structs and compare those piecemeal instead.
|
||||||
|
|
||||||
|
Reported-by: Rusty Russell <rusty@rustcorp.com.au>
|
||||||
|
Signed-off-by: David Howells <dhowells@redhat.com>
|
||||||
|
---
|
||||||
|
|
||||||
|
crypto/asymmetric_keys/x509_cert_parser.c | 25 ++++++++---------
|
||||||
|
crypto/asymmetric_keys/x509_parser.h | 4 +--
|
||||||
|
crypto/asymmetric_keys/x509_public_key.c | 42 ++++++++++++++++++++++++++---
|
||||||
|
3 files changed, 51 insertions(+), 20 deletions(-)
|
||||||
|
|
||||||
|
|
||||||
|
diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c
|
||||||
|
index 8fcac94..db07e8c 100644
|
||||||
|
--- a/crypto/asymmetric_keys/x509_cert_parser.c
|
||||||
|
+++ b/crypto/asymmetric_keys/x509_cert_parser.c
|
||||||
|
@@ -434,11 +434,10 @@ int x509_process_extension(void *context, size_t hdrlen,
|
||||||
|
/*
|
||||||
|
* Record a certificate time.
|
||||||
|
*/
|
||||||
|
-static int x509_note_time(time_t *_time, size_t hdrlen,
|
||||||
|
+static int x509_note_time(struct tm *tm, size_t hdrlen,
|
||||||
|
unsigned char tag,
|
||||||
|
const unsigned char *value, size_t vlen)
|
||||||
|
{
|
||||||
|
- unsigned YY, MM, DD, hh, mm, ss;
|
||||||
|
const unsigned char *p = value;
|
||||||
|
|
||||||
|
#define dec2bin(X) ((X) - '0')
|
||||||
|
@@ -448,30 +447,30 @@ static int x509_note_time(time_t *_time, size_t hdrlen,
|
||||||
|
/* UTCTime: YYMMDDHHMMSSZ */
|
||||||
|
if (vlen != 13)
|
||||||
|
goto unsupported_time;
|
||||||
|
- YY = DD2bin(p);
|
||||||
|
- if (YY > 50)
|
||||||
|
- YY += 1900;
|
||||||
|
+ tm->tm_year = DD2bin(p);
|
||||||
|
+ if (tm->tm_year >= 50)
|
||||||
|
+ tm->tm_year += 1900;
|
||||||
|
else
|
||||||
|
- YY += 2000;
|
||||||
|
+ tm->tm_year += 2000;
|
||||||
|
} else if (tag == ASN1_GENTIM) {
|
||||||
|
/* GenTime: YYYYMMDDHHMMSSZ */
|
||||||
|
if (vlen != 15)
|
||||||
|
goto unsupported_time;
|
||||||
|
- YY = DD2bin(p) * 100 + DD2bin(p);
|
||||||
|
+ tm->tm_year = DD2bin(p) * 100 + DD2bin(p);
|
||||||
|
} else {
|
||||||
|
goto unsupported_time;
|
||||||
|
}
|
||||||
|
|
||||||
|
- MM = DD2bin(p);
|
||||||
|
- DD = DD2bin(p);
|
||||||
|
- hh = DD2bin(p);
|
||||||
|
- mm = DD2bin(p);
|
||||||
|
- ss = DD2bin(p);
|
||||||
|
+ tm->tm_year -= 1900;
|
||||||
|
+ tm->tm_mon = DD2bin(p) - 1;
|
||||||
|
+ tm->tm_mday = DD2bin(p);
|
||||||
|
+ tm->tm_hour = DD2bin(p);
|
||||||
|
+ tm->tm_min = DD2bin(p);
|
||||||
|
+ tm->tm_sec = DD2bin(p);
|
||||||
|
|
||||||
|
if (*p != 'Z')
|
||||||
|
goto unsupported_time;
|
||||||
|
|
||||||
|
- *_time = mktime(YY, MM, DD, hh, mm, ss);
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
unsupported_time:
|
||||||
|
diff --git a/crypto/asymmetric_keys/x509_parser.h b/crypto/asymmetric_keys/x509_parser.h
|
||||||
|
index 635053f..f86dc5f 100644
|
||||||
|
--- a/crypto/asymmetric_keys/x509_parser.h
|
||||||
|
+++ b/crypto/asymmetric_keys/x509_parser.h
|
||||||
|
@@ -18,8 +18,8 @@ struct x509_certificate {
|
||||||
|
char *subject; /* Name of certificate subject */
|
||||||
|
char *fingerprint; /* Key fingerprint as hex */
|
||||||
|
char *authority; /* Authority key fingerprint as hex */
|
||||||
|
- time_t valid_from;
|
||||||
|
- time_t valid_to;
|
||||||
|
+ struct tm valid_from;
|
||||||
|
+ struct tm valid_to;
|
||||||
|
enum pkey_algo pkey_algo : 8; /* Public key algorithm */
|
||||||
|
enum pkey_algo sig_pkey_algo : 8; /* Signature public key algorithm */
|
||||||
|
enum pkey_hash_algo sig_hash_algo : 8; /* Signature hash algorithm */
|
||||||
|
diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c
|
||||||
|
index 716917c..5ab736d 100644
|
||||||
|
--- a/crypto/asymmetric_keys/x509_public_key.c
|
||||||
|
+++ b/crypto/asymmetric_keys/x509_public_key.c
|
||||||
|
@@ -106,7 +106,7 @@ error_no_sig:
|
||||||
|
static int x509_key_preparse(struct key_preparsed_payload *prep)
|
||||||
|
{
|
||||||
|
struct x509_certificate *cert;
|
||||||
|
- time_t now;
|
||||||
|
+ struct tm now;
|
||||||
|
size_t srlen, sulen;
|
||||||
|
char *desc = NULL;
|
||||||
|
int ret;
|
||||||
|
@@ -118,7 +118,14 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
|
||||||
|
pr_devel("Cert Issuer: %s\n", cert->issuer);
|
||||||
|
pr_devel("Cert Subject: %s\n", cert->subject);
|
||||||
|
pr_devel("Cert Key Algo: %s\n", pkey_algo[cert->pkey_algo]);
|
||||||
|
- pr_devel("Cert Valid: %lu - %lu\n", cert->valid_from, cert->valid_to);
|
||||||
|
+ printk("Cert Valid From: %04ld-%02d-%02d %02d:%02d:%02d\n",
|
||||||
|
+ cert->valid_from.tm_year + 1900, cert->valid_from.tm_mon + 1,
|
||||||
|
+ cert->valid_from.tm_mday, cert->valid_from.tm_hour,
|
||||||
|
+ cert->valid_from.tm_min, cert->valid_from.tm_sec);
|
||||||
|
+ printk("Cert Valid To: %04ld-%02d-%02d %02d:%02d:%02d\n",
|
||||||
|
+ cert->valid_to.tm_year + 1900, cert->valid_to.tm_mon + 1,
|
||||||
|
+ cert->valid_to.tm_mday, cert->valid_to.tm_hour,
|
||||||
|
+ cert->valid_to.tm_min, cert->valid_to.tm_sec);
|
||||||
|
pr_devel("Cert Signature: %s + %s\n",
|
||||||
|
pkey_algo[cert->sig_pkey_algo],
|
||||||
|
pkey_hash_algo[cert->sig_hash_algo]);
|
||||||
|
@@ -130,13 +137,38 @@ static int x509_key_preparse(struct key_preparsed_payload *prep)
|
||||||
|
goto error_free_cert;
|
||||||
|
}
|
||||||
|
|
||||||
|
- now = CURRENT_TIME.tv_sec;
|
||||||
|
- if (now < cert->valid_from) {
|
||||||
|
+ time_to_tm(CURRENT_TIME.tv_sec, 0, &now);
|
||||||
|
+ printk("Now: %04ld-%02d-%02d %02d:%02d:%02d\n",
|
||||||
|
+ now.tm_year + 1900, now.tm_mon + 1, now.tm_mday,
|
||||||
|
+ now.tm_hour, now.tm_min, now.tm_sec);
|
||||||
|
+ if (now.tm_year < cert->valid_from.tm_year ||
|
||||||
|
+ (now.tm_year == cert->valid_from.tm_year &&
|
||||||
|
+ (now.tm_mon < cert->valid_from.tm_mon ||
|
||||||
|
+ (now.tm_mon == cert->valid_from.tm_mon &&
|
||||||
|
+ (now.tm_mday < cert->valid_from.tm_mday ||
|
||||||
|
+ (now.tm_mday == cert->valid_from.tm_mday &&
|
||||||
|
+ (now.tm_hour < cert->valid_from.tm_hour ||
|
||||||
|
+ (now.tm_hour == cert->valid_from.tm_hour &&
|
||||||
|
+ (now.tm_min < cert->valid_from.tm_min ||
|
||||||
|
+ (now.tm_min == cert->valid_from.tm_min &&
|
||||||
|
+ (now.tm_sec < cert->valid_from.tm_sec
|
||||||
|
+ ))))))))))) {
|
||||||
|
pr_warn("Cert %s is not yet valid\n", cert->fingerprint);
|
||||||
|
ret = -EKEYREJECTED;
|
||||||
|
goto error_free_cert;
|
||||||
|
}
|
||||||
|
- if (now >= cert->valid_to) {
|
||||||
|
+ if (now.tm_year > cert->valid_to.tm_year ||
|
||||||
|
+ (now.tm_year == cert->valid_to.tm_year &&
|
||||||
|
+ (now.tm_mon > cert->valid_to.tm_mon ||
|
||||||
|
+ (now.tm_mon == cert->valid_to.tm_mon &&
|
||||||
|
+ (now.tm_mday > cert->valid_to.tm_mday ||
|
||||||
|
+ (now.tm_mday == cert->valid_to.tm_mday &&
|
||||||
|
+ (now.tm_hour > cert->valid_to.tm_hour ||
|
||||||
|
+ (now.tm_hour == cert->valid_to.tm_hour &&
|
||||||
|
+ (now.tm_min > cert->valid_to.tm_min ||
|
||||||
|
+ (now.tm_min == cert->valid_to.tm_min &&
|
||||||
|
+ (now.tm_sec > cert->valid_to.tm_sec
|
||||||
|
+ ))))))))))) {
|
||||||
|
pr_warn("Cert %s has expired\n", cert->fingerprint);
|
||||||
|
ret = -EKEYEXPIRED;
|
||||||
|
goto error_free_cert;
|
||||||
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user