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authorsana kazi <sanakazisk19@gmail.com>2021-12-16 16:23:03 +0530
committerArmin Kuster <akuster808@gmail.com>2021-12-18 11:08:54 -0800
commit82264cbf0b69e9f0f07428a48f26f0261aa9a0d8 (patch)
tree80340d45fe35bd292286c524b16fe9c5d8aac08e
parent6025097d083a36d9af3d53d2dd95631a2de87a8d (diff)
downloadmeta-openembedded-82264cbf0b69e9f0f07428a48f26f0261aa9a0d8.tar.gz
nss: Fix CVE-2021-43527
Add patch to fix CVE-2021-43527 which causes heap overflow in nss. Signed-off-by: Sana Kazi <Sana.Kazi@kpit.com> Signed-off-by: Sana Kazi <sanakazisk19@gmail.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>
Diffstat
-rw-r--r--meta-oe/recipes-support/nss/nss/CVE-2021-43527.patch283
-rw-r--r--meta-oe/recipes-support/nss/nss_3.51.1.bb1
2 files changed, 284 insertions, 0 deletions
diff --git a/meta-oe/recipes-support/nss/nss/CVE-2021-43527.patch b/meta-oe/recipes-support/nss/nss/CVE-2021-43527.patch
new file mode 100644
index 0000000000..cf3ea63cac
--- /dev/null
+++ b/meta-oe/recipes-support/nss/nss/CVE-2021-43527.patch
@@ -0,0 +1,283 @@
1Description: fix heap overflow when verifying DSA/RSA-PSS DER-encoded signatures
2Origin: Provided by Mozilla
3
4CVE: CVE-2021-43527
5Upstream-Status: Backport [http://archive.ubuntu.com/ubuntu/pool/main/n/nss/nss_3.35-2ubuntu2.13.debian.tar.xz]
6Comment: Refreshed hunk 1 and 6 due to fuzz
7Signed-off-by: Sana Kazi <Sana.Kazi@kpit.com>
8
9--- a/nss/lib/cryptohi/secvfy.c
10+++ b/nss/lib/cryptohi/secvfy.c
11@@ -164,6 +164,37 @@
12 PR_FALSE /*XXX: unsafeAllowMissingParameters*/);
13 }
14
15+static unsigned int
16+checkedSignatureLen(const SECKEYPublicKey *pubk)
17+{
18+ unsigned int sigLen = SECKEY_SignatureLen(pubk);
19+ if (sigLen == 0) {
20+ /* Error set by SECKEY_SignatureLen */
21+ return sigLen;
22+ }
23+ unsigned int maxSigLen;
24+ switch (pubk->keyType) {
25+ case rsaKey:
26+ case rsaPssKey:
27+ maxSigLen = (RSA_MAX_MODULUS_BITS + 7) / 8;
28+ break;
29+ case dsaKey:
30+ maxSigLen = DSA_MAX_SIGNATURE_LEN;
31+ break;
32+ case ecKey:
33+ maxSigLen = 2 * MAX_ECKEY_LEN;
34+ break;
35+ default:
36+ PORT_SetError(SEC_ERROR_UNSUPPORTED_KEYALG);
37+ return 0;
38+ }
39+ if (sigLen > maxSigLen) {
40+ PORT_SetError(SEC_ERROR_INVALID_KEY);
41+ return 0;
42+ }
43+ return sigLen;
44+}
45+
46 /*
47 * decode the ECDSA or DSA signature from it's DER wrapping.
48 * The unwrapped/raw signature is placed in the buffer pointed
49@@ -174,38 +205,38 @@ decodeECorDSASignature(SECOidTag algid,
50 unsigned int len)
51 {
52 SECItem *dsasig = NULL; /* also used for ECDSA */
53- SECStatus rv = SECSuccess;
54
55- if ((algid != SEC_OID_ANSIX9_DSA_SIGNATURE) &&
56- (algid != SEC_OID_ANSIX962_EC_PUBLIC_KEY)) {
57- if (sig->len != len) {
58- PORT_SetError(SEC_ERROR_BAD_DER);
59- return SECFailure;
60+ /* Safety: Ensure algId is as expected and that signature size is within maxmimums */
61+ if (algid == SEC_OID_ANSIX9_DSA_SIGNATURE) {
62+ if (len > DSA_MAX_SIGNATURE_LEN) {
63+ goto loser;
64 }
65-
66- PORT_Memcpy(dsig, sig->data, sig->len);
67- return SECSuccess;
68- }
69-
70- if (algid == SEC_OID_ANSIX962_EC_PUBLIC_KEY) {
71+ } else if (algid == SEC_OID_ANSIX962_EC_PUBLIC_KEY) {
72 if (len > MAX_ECKEY_LEN * 2) {
73- PORT_SetError(SEC_ERROR_BAD_DER);
74- return SECFailure;
75+ goto loser;
76 }
77- }
78- dsasig = DSAU_DecodeDerSigToLen((SECItem *)sig, len);
79-
80- if ((dsasig == NULL) || (dsasig->len != len)) {
81- rv = SECFailure;
82 } else {
83- PORT_Memcpy(dsig, dsasig->data, dsasig->len);
84+ goto loser;
85 }
86
87- if (dsasig != NULL)
88+ /* Decode and pad to length */
89+ dsasig = DSAU_DecodeDerSigToLen((SECItem *)sig, len);
90+ if (dsasig == NULL) {
91+ goto loser;
92+ }
93+ if (dsasig->len != len) {
94 SECITEM_FreeItem(dsasig, PR_TRUE);
95- if (rv == SECFailure)
96- PORT_SetError(SEC_ERROR_BAD_DER);
97- return rv;
98+ goto loser;
99+ }
100+
101+ PORT_Memcpy(dsig, dsasig->data, len);
102+ SECITEM_FreeItem(dsasig, PR_TRUE);
103+
104+ return SECSuccess;
105+
106+loser:
107+ PORT_SetError(SEC_ERROR_BAD_DER);
108+ return SECFailure;
109 }
110
111 const SEC_ASN1Template hashParameterTemplate[] =
112@@ -231,7 +262,7 @@ SECStatus
113 sec_DecodeSigAlg(const SECKEYPublicKey *key, SECOidTag sigAlg,
114 const SECItem *param, SECOidTag *encalg, SECOidTag *hashalg)
115 {
116- int len;
117+ unsigned int len;
118 PLArenaPool *arena;
119 SECStatus rv;
120 SECItem oid;
121@@ -458,48 +489,52 @@ vfy_CreateContext(const SECKEYPublicKey
122 cx->pkcs1RSADigestInfo = NULL;
123 rv = SECSuccess;
124 if (sig) {
125- switch (type) {
126- case rsaKey:
127- rv = recoverPKCS1DigestInfo(hashAlg, &cx->hashAlg,
128- &cx->pkcs1RSADigestInfo,
129- &cx->pkcs1RSADigestInfoLen,
130- cx->key,
131- sig, wincx);
132- break;
133- case rsaPssKey:
134- sigLen = SECKEY_SignatureLen(key);
135- if (sigLen == 0) {
136- /* error set by SECKEY_SignatureLen */
137- rv = SECFailure;
138+ rv = SECFailure;
139+ if (type == rsaKey) {
140+ rv = recoverPKCS1DigestInfo(hashAlg, &cx->hashAlg,
141+ &cx->pkcs1RSADigestInfo,
142+ &cx->pkcs1RSADigestInfoLen,
143+ cx->key,
144+ sig, wincx);
145+ } else {
146+ sigLen = checkedSignatureLen(key);
147+ /* Check signature length is within limits */
148+ if (sigLen == 0) {
149+ /* error set by checkedSignatureLen */
150+ rv = SECFailure;
151+ goto loser;
152+ }
153+ if (sigLen > sizeof(cx->u)) {
154+ PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
155+ rv = SECFailure;
156+ goto loser;
157+ }
158+ switch (type) {
159+ case rsaPssKey:
160+ if (sig->len != sigLen) {
161+ PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
162+ rv = SECFailure;
163+ goto loser;
164+ }
165+ PORT_Memcpy(cx->u.buffer, sig->data, sigLen);
166+ rv = SECSuccess;
167 break;
168- }
169- if (sig->len != sigLen) {
170- PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
171- rv = SECFailure;
172+ case ecKey:
173+ case dsaKey:
174+ /* decodeECorDSASignature will check sigLen == sig->len after padding */
175+ rv = decodeECorDSASignature(encAlg, sig, cx->u.buffer, sigLen);
176 break;
177- }
178- PORT_Memcpy(cx->u.buffer, sig->data, sigLen);
179- break;
180- case dsaKey:
181- case ecKey:
182- sigLen = SECKEY_SignatureLen(key);
183- if (sigLen == 0) {
184- /* error set by SECKEY_SignatureLen */
185+ default:
186+ /* Unreachable */
187 rv = SECFailure;
188- break;
189- }
190- rv = decodeECorDSASignature(encAlg, sig, cx->u.buffer, sigLen);
191- break;
192- default:
193- rv = SECFailure;
194- PORT_SetError(SEC_ERROR_UNSUPPORTED_KEYALG);
195- break;
196+ goto loser;
197+ }
198+ }
199+ if (rv != SECSuccess) {
200+ goto loser;
201 }
202 }
203
204- if (rv)
205- goto loser;
206-
207 /* check hash alg again, RSA may have changed it.*/
208 if (HASH_GetHashTypeByOidTag(cx->hashAlg) == HASH_AlgNULL) {
209 /* error set by HASH_GetHashTypeByOidTag */
210@@ -634,11 +669,16 @@ VFY_EndWithSignature(VFYContext *cx, SEC
211 switch (cx->key->keyType) {
212 case ecKey:
213 case dsaKey:
214- dsasig.data = cx->u.buffer;
215- dsasig.len = SECKEY_SignatureLen(cx->key);
216+ dsasig.len = checkedSignatureLen(cx->key);
217 if (dsasig.len == 0) {
218 return SECFailure;
219 }
220+ if (dsasig.len > sizeof(cx->u)) {
221+ PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
222+ return SECFailure;
223+ }
224+ dsasig.data = cx->u.buffer;
225+
226 if (sig) {
227 rv = decodeECorDSASignature(cx->encAlg, sig, dsasig.data,
228 dsasig.len);
229@@ -667,8 +698,13 @@
230 }
231
232 rsasig.data = cx->u.buffer;
233- rsasig.len = SECKEY_SignatureLen(cx->key);
234+ rsasig.len = checkedSignatureLen(cx->key);
235 if (rsasig.len == 0) {
236+ /* Error set by checkedSignatureLen */
237+ return SECFailure;
238+ }
239+ if (rsasig.len > sizeof(cx->u)) {
240+ PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
241 return SECFailure;
242 }
243 if (sig) {
244@@ -743,7 +788,6 @@ vfy_VerifyDigest(const SECItem *digest,
245 SECStatus rv;
246 VFYContext *cx;
247 SECItem dsasig; /* also used for ECDSA */
248-
249 rv = SECFailure;
250
251 cx = vfy_CreateContext(key, sig, encAlg, hashAlg, NULL, wincx);
252@@ -751,19 +795,25 @@ vfy_VerifyDigest(const SECItem *digest,
253 switch (key->keyType) {
254 case rsaKey:
255 rv = verifyPKCS1DigestInfo(cx, digest);
256+ /* Error (if any) set by verifyPKCS1DigestInfo */
257 break;
258- case dsaKey:
259 case ecKey:
260+ case dsaKey:
261 dsasig.data = cx->u.buffer;
262- dsasig.len = SECKEY_SignatureLen(cx->key);
263+ dsasig.len = checkedSignatureLen(cx->key);
264 if (dsasig.len == 0) {
265+ /* Error set by checkedSignatureLen */
266+ rv = SECFailure;
267 break;
268 }
269- if (PK11_Verify(cx->key, &dsasig, (SECItem *)digest, cx->wincx) !=
270- SECSuccess) {
271+ if (dsasig.len > sizeof(cx->u)) {
272+ PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
273+ rv = SECFailure;
274+ break;
275+ }
276+ rv = PK11_Verify(cx->key, &dsasig, (SECItem *)digest, cx->wincx);
277+ if (rv != SECSuccess) {
278 PORT_SetError(SEC_ERROR_BAD_SIGNATURE);
279- } else {
280- rv = SECSuccess;
281 }
282 break;
283 default:
diff --git a/meta-oe/recipes-support/nss/nss_3.51.1.bb b/meta-oe/recipes-support/nss/nss_3.51.1.bb
index 14f670c32a..f03473b1a0 100644
--- a/meta-oe/recipes-support/nss/nss_3.51.1.bb
+++ b/meta-oe/recipes-support/nss/nss_3.51.1.bb
@@ -39,6 +39,7 @@ SRC_URI = "http://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/${VERSIO
39 file://CVE-2020-6829_12400.patch \ 39 file://CVE-2020-6829_12400.patch \
40 file://CVE-2020-12403_1.patch \ 40 file://CVE-2020-12403_1.patch \
41 file://CVE-2020-12403_2.patch \ 41 file://CVE-2020-12403_2.patch \
42 file://CVE-2021-43527.patch \
42 " 43 "
43 44
44SRC_URI[md5sum] = "6acaf1ddff69306ae30a908881c6f233" 45SRC_URI[md5sum] = "6acaf1ddff69306ae30a908881c6f233"
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2025-12-10 05:07:01 +0000