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Fix possible DoS translating ASN.1 object identifiers

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Resolves: CVE-2023-2650
This commit is contained in:
Dmitry Belyavskiy 2023-05-30 16:29:57 +02:00
parent 103d3109dc
commit df4dd7dd7f
2 changed files with 36 additions and 1 deletions
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30
0122-CVE-2023-2650.patch Normal file
View File

@ -0,0 +1,30 @@
diff --git a/crypto/objects/obj_dat.c b/crypto/objects/obj_dat.c
index 01cde00e98..c0e55197a0 100644
--- a/crypto/objects/obj_dat.c
+++ b/crypto/objects/obj_dat.c
@@ -443,6 +443,25 @@ int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name)
first = 1;
bl = NULL;
+ /*
+ * RFC 2578 (STD 58) says this about OBJECT IDENTIFIERs:
+ *
+ * > 3.5. OBJECT IDENTIFIER values
+ * >
+ * > An OBJECT IDENTIFIER value is an ordered list of non-negative
+ * > numbers. For the SMIv2, each number in the list is referred to as a
+ * > sub-identifier, there are at most 128 sub-identifiers in a value,
+ * > and each sub-identifier has a maximum value of 2^32-1 (4294967295
+ * > decimal).
+ *
+ * So a legitimate OID according to this RFC is at most (32 * 128 / 7),
+ * i.e. 586 bytes long.
+ *
+ * Ref: https://datatracker.ietf.org/doc/html/rfc2578#section-3.5
+ */
+ if (len > 586)
+ goto err;
+
while (len > 0) {
l = 0;
use_bn = 0;

7
openssl.spec
View File

@ -29,7 +29,7 @@ print(string.sub(hash, 0, 16))
Summary: Utilities from the general purpose cryptography library with TLS implementation Summary: Utilities from the general purpose cryptography library with TLS implementation
Name: openssl Name: openssl
Version: 3.0.7 Version: 3.0.7
Release: 19%{?dist} Release: 20%{?dist}
Epoch: 1 Epoch: 1
# We have to remove certain patented algorithms from the openssl source # We have to remove certain patented algorithms from the openssl source
# tarball with the hobble-openssl script which is included below. # tarball with the hobble-openssl script which is included below.
@ -194,6 +194,7 @@ Patch118: 0118-CVE-2023-1255.patch
Patch120: 0120-RSA-PKCS15-implicit-rejection.patch Patch120: 0120-RSA-PKCS15-implicit-rejection.patch
# https://bugzilla.redhat.com/show_bug.cgi?id=2160797 # https://bugzilla.redhat.com/show_bug.cgi?id=2160797
Patch121: 0121-FIPS-cms-defaults.patch Patch121: 0121-FIPS-cms-defaults.patch
Patch122: 0122-CVE-2023-2650.patch
License: ASL 2.0 License: ASL 2.0
URL: http://www.openssl.org/ URL: http://www.openssl.org/
@ -517,6 +518,10 @@ install -m644 %{SOURCE9} \
%ldconfig_scriptlets libs %ldconfig_scriptlets libs
%changelog %changelog
* Tue May 30 2023 Dmitry Belyavskiy <dbelyavs@redhat.com> - 1:3.0.7-20
- Fix possible DoS translating ASN.1 object identifiers
Resolves: CVE-2023-2650
* Mon May 22 2023 Clemens Lang <cllang@redhat.com> - 1:3.0.7-19 * Mon May 22 2023 Clemens Lang <cllang@redhat.com> - 1:3.0.7-19
- Re-enable DHX keys in FIPS mode, disable FIPS 186-4 parameter validation and generation in FIPS mode - Re-enable DHX keys in FIPS mode, disable FIPS 186-4 parameter validation and generation in FIPS mode
Resolves: rhbz#2169757 Resolves: rhbz#2169757