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author | wang biao <biao716.wang@samsung.com> | 2023-02-23 15:03:36 +0800 |
---|---|---|
committer | wang biao <biao716.wang@samsung.com> | 2023-02-23 16:15:25 +0800 |
commit | 4fbbeefc813b53bb3c9690a321c522991058a483 (patch) | |
tree | 5106942b6ac85a6cda6839f820dd22257e2d9c07 | |
parent | 5746c1980a7000e123edd6837284dd5af3a12c9a (diff) | |
download | rpm-4fbbeefc813b53bb3c9690a321c522991058a483.tar.gz rpm-4fbbeefc813b53bb3c9690a321c522991058a483.tar.bz2 rpm-4fbbeefc813b53bb3c9690a321c522991058a483.zip |
Fix CVE-2021-20266: hdrblobInit() needs bounds checks toosubmit/tizen_7.0_base/20230222.163040accepted/tizen/7.0/base/tool/20230227.052649
https://github.com/rpm-software-management/rpm/commit/8f4b3c3cab8922a2022b9e47c71f1ecf906077ef
Fix CVE-2021-3521: Validate and require subkey binding signatures on PGP public keys
https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8
Change-Id: I3daeff22a4f7240923cb1eb82bc9822cd3737d86
Signed-off-by: wang biao <biao716.wang@samsung.com>
-rw-r--r-- | lib/header.c | 48 | ||||
-rw-r--r-- | rpmio/rpmpgp.c | 108 | ||||
-rw-r--r-- | tests/Makefile.am | 3 | ||||
-rwxr-xr-x | tests/data/keys/CVE-2021-3521-badbind.asc | 25 | ||||
-rwxr-xr-x | tests/data/keys/CVE-2021-3521-nosubsig-last.asc | 25 | ||||
-rwxr-xr-x | tests/data/keys/CVE-2021-3521-nosubsig.asc | 37 | ||||
-rw-r--r-- | tests/rpmsigdig.at | 28 |
7 files changed, 249 insertions, 25 deletions
diff --git a/lib/header.c b/lib/header.c index 0f6efe485..0d50f0daf 100644 --- a/lib/header.c +++ b/lib/header.c @@ -11,6 +11,7 @@ #include "system.h" #include <netdb.h> #include <errno.h> +#include <inttypes.h> #include <rpm/rpmtypes.h> #include <rpm/rpmstring.h> #include "lib/header_internal.h" @@ -1851,6 +1852,25 @@ exit: return rc; } + +static rpmRC hdrblobVerifyLengths(rpmTagVal regionTag, uint32_t il, uint32_t dl, + char **emsg) { + uint32_t il_max = HEADER_TAGS_MAX; + uint32_t dl_max = HEADER_DATA_MAX; + if (regionTag == RPMTAG_HEADERSIGNATURES) { + il_max = 32; + dl_max = 64 * 1024 * 1024; + } + if (hdrchkRange(il_max, il)) { + rasprintf(emsg, _("hdr tags: BAD, no. of tags(%" PRIu32 ") out of range"), il); + return RPMRC_FAIL; + } + if (hdrchkRange(dl_max, dl)) { + rasprintf(emsg, _("hdr data: BAD, no. of bytes(%" PRIu32 ") out of range"), dl); + return RPMRC_FAIL; + } + return RPMRC_OK; +} rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrblob blob, char **emsg) { int32_t block[4]; @@ -1863,13 +1883,6 @@ rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrbl size_t nb; rpmRC rc = RPMRC_FAIL; /* assume failure */ int xx; - int32_t il_max = HEADER_TAGS_MAX; - int32_t dl_max = HEADER_DATA_MAX; - - if (regionTag == RPMTAG_HEADERSIGNATURES) { - il_max = 32; - dl_max = 8192; - } memset(block, 0, sizeof(block)); if ((xx = Freadall(fd, bs, blen)) != blen) { @@ -1882,15 +1895,9 @@ rpmRC hdrblobRead(FD_t fd, int magic, int exact_size, rpmTagVal regionTag, hdrbl goto exit; } il = ntohl(block[2]); - if (hdrchkRange(il_max, il)) { - rasprintf(emsg, _("hdr tags: BAD, no. of tags(%d) out of range"), il); - goto exit; - } dl = ntohl(block[3]); - if (hdrchkRange(dl_max, dl)) { - rasprintf(emsg, _("hdr data: BAD, no. of bytes(%d) out of range"), dl); + if (hdrblobVerifyLengths(regionTag, il, dl, emsg)) goto exit; - } nb = (il * sizeof(struct entryInfo_s)) + dl; uc = sizeof(il) + sizeof(dl) + nb; @@ -1934,11 +1941,18 @@ rpmRC hdrblobInit(const void *uh, size_t uc, struct hdrblob_s *blob, char **emsg) { rpmRC rc = RPMRC_FAIL; - memset(blob, 0, sizeof(*blob)); + if (uc && uc < 8) { + rasprintf(emsg, _("hdr length: BAD")); + goto exit; + } + blob->ei = (int32_t *) uh; /* discards const */ - blob->il = ntohl(blob->ei[0]); - blob->dl = ntohl(blob->ei[1]); + blob->il = ntohl((uint32_t)(blob->ei[0])); + blob->dl = ntohl((uint32_t)(blob->ei[1])); + if (hdrblobVerifyLengths(regionTag, blob->il, blob->dl, emsg) != RPMRC_OK) + goto exit; + blob->pe = (entryInfo) &(blob->ei[2]); blob->pvlen = sizeof(blob->il) + sizeof(blob->dl) + (blob->il * sizeof(*blob->pe)) + blob->dl; diff --git a/rpmio/rpmpgp.c b/rpmio/rpmpgp.c index 061751a4d..15cce2275 100644 --- a/rpmio/rpmpgp.c +++ b/rpmio/rpmpgp.c @@ -999,36 +999,128 @@ unsigned int pgpDigParamsAlgo(pgpDigParams digp, unsigned int algotype) return algo; } +static pgpDigParams pgpDigParamsNew(uint8_t tag) +{ + pgpDigParams digp = xcalloc(1, sizeof(*digp)); + digp->tag = tag; + return digp; +} + +static int hashKey(DIGEST_CTX hash, const struct pgpPkt *pkt, int exptag) +{ + int rc = -1; + if (pkt->tag == exptag) { + uint8_t head[] = { + 0x99, + (pkt->blen >> 8), + (pkt->blen ), + }; + + rpmDigestUpdate(hash, head, 3); + rpmDigestUpdate(hash, pkt->body, pkt->blen); + rc = 0; + } + return rc; +} + +static int pgpVerifySelf(pgpDigParams key, pgpDigParams selfsig, + const struct pgpPkt *all, int i) +{ + int rc = -1; + DIGEST_CTX hash = NULL; + + switch (selfsig->sigtype) { + case PGPSIGTYPE_SUBKEY_BINDING: + hash = rpmDigestInit(selfsig->hash_algo, 0); + if (hash) { + rc = hashKey(hash, &all[0], PGPTAG_PUBLIC_KEY); + if (!rc) + rc = hashKey(hash, &all[i-1], PGPTAG_PUBLIC_SUBKEY); + } + break; + default: + /* ignore types we can't handle */ + rc = 0; + break; + } + + if (hash && rc == 0) + rc = pgpVerifySignature(key, selfsig, hash); + + rpmDigestFinal(hash, NULL, NULL, 0); + + return rc; +} + int pgpPrtParams(const uint8_t * pkts, size_t pktlen, unsigned int pkttype, pgpDigParams * ret) { const uint8_t *p = pkts; const uint8_t *pend = pkts + pktlen; pgpDigParams digp = NULL; - struct pgpPkt pkt; + pgpDigParams selfsig = NULL; + int i = 0; + int alloced = 16; /* plenty for normal cases */ + struct pgpPkt *all = xmalloc(alloced * sizeof(*all)); int rc = -1; /* assume failure */ + int expect = 0; + int prevtag = 0; while (p < pend) { - if (decodePkt(p, (pend - p), &pkt)) + struct pgpPkt *pkt = &all[i]; + if (decodePkt(p, (pend - p), pkt)) break; if (digp == NULL) { - if (pkttype && pkt.tag != pkttype) { + if (pkttype && pkt->tag != pkttype) { break; } else { - digp = xcalloc(1, sizeof(*digp)); - digp->tag = pkt.tag; + digp = pgpDigParamsNew(pkt->tag); } } - if (pgpPrtPkt(&pkt, digp)) + if (expect) { + if (pkt->tag != expect) + break; + selfsig = pgpDigParamsNew(pkt->tag); + } + + if (pgpPrtPkt(pkt, selfsig ? selfsig : digp)) break; - p += (pkt.body - pkt.head) + pkt.blen; + if (selfsig) { + /* subkeys must be followed by binding signature */ + if (prevtag == PGPTAG_PUBLIC_SUBKEY) { + if (selfsig->sigtype != PGPSIGTYPE_SUBKEY_BINDING) + break; + } + + int xx = pgpVerifySelf(digp, selfsig, all, i); + + selfsig = pgpDigParamsFree(selfsig); + if (xx) + break; + expect = 0; + } + + if (pkt->tag == PGPTAG_PUBLIC_SUBKEY) + expect = PGPTAG_SIGNATURE; + prevtag = pkt->tag; + + i++; + p += (pkt->body - pkt->head) + pkt->blen; + if (pkttype == PGPTAG_SIGNATURE) + break; + + if (alloced <= i) { + alloced *= 2; + all = xrealloc(all, alloced * sizeof(*all)); + } } - rc = (digp && (p == pend)) ? 0 : -1; + rc = (digp && (p == pend) && expect == 0) ? 0 : -1; + free(all); if (ret && rc == 0) { *ret = digp; } else { diff --git a/tests/Makefile.am b/tests/Makefile.am index f2bdb7bae..bd5d4d71d 100644 --- a/tests/Makefile.am +++ b/tests/Makefile.am @@ -86,6 +86,9 @@ EXTRA_DIST += data/SPECS/hello-config-buildid.spec EXTRA_DIST += data/SPECS/hello-cd.spec EXTRA_DIST += data/keys/rpm.org-rsa-2048-test.pub EXTRA_DIST += data/keys/rpm.org-rsa-2048-test.secret +EXTRA_DIST += data/keys/CVE-2021-3521-badbind.asc +EXTRA_DIST += data/keys/CVE-2021-3521-nosubsig.asc +EXTRA_DIST += data/keys/CVE-2021-3521-nosubsig-last.asc # testsuite voodoo AUTOTEST = $(AUTOM4TE) --language=autotest diff --git a/tests/data/keys/CVE-2021-3521-badbind.asc b/tests/data/keys/CVE-2021-3521-badbind.asc new file mode 100755 index 000000000..aea00f9d7 --- /dev/null +++ b/tests/data/keys/CVE-2021-3521-badbind.asc @@ -0,0 +1,25 @@ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: rpm-4.17.90 (NSS-3) + +mQENBFjmORgBCAC7TMEk6wnjSs8Dr4yqSScWdU2pjcqrkTxuzdWvowcIUPZI0w/g +HkRqGd4apjvY2V15kjL10gk3QhFP3pZ/9p7zh8o8NHX7aGdSGDK7NOq1eFaErPRY +91LW9RiZ0lbOjXEzIL0KHxUiTQEmdXJT43DJMFPyW9fkCWg0OltiX618FUdWWfI8 +eySdLur1utnqBvdEbCUvWK2RX3vQZQdvEBODnNk2pxqTyV0w6VPQ96W++lF/5Aas +7rUv3HIyIXxIggc8FRrnH+y9XvvHDonhTIlGnYZN4ubm9i4y3gOkrZlGTrEw7elQ +1QeMyG2QQEbze8YjpTm4iLABCBrRfPRaQpwrABEBAAG0IXJwbS5vcmcgUlNBIHRl +c3RrZXkgPHJzYUBycG0ub3JnPokBNwQTAQgAIQUCWOY5GAIbAwULCQgHAgYVCAkK +CwIEFgIDAQIeAQIXgAAKCRBDRFkeGWTF/MxxCACnjqFL+MmPh9W9JQKT2DcLbBzf +Cqo6wcEBoCOcwgRSk8dSikhARoteoa55JRJhuMyeKhhEAogE9HRmCPFdjezFTwgB +BDVBpO2dZ023mLXDVCYX3S8pShOgCP6Tn4wqCnYeAdLcGg106N4xcmgtcssJE+Pr +XzTZksbZsrTVEmL/Ym+R5w5jBfFnGk7Yw7ndwfQsfNXQb5AZynClFxnX546lcyZX +fEx3/e6ezw57WNOUK6WT+8b+EGovPkbetK/rGxNXuWaP6X4A/QUm8O98nCuHYFQq ++mvNdsCBqGf7mhaRGtpHk/JgCn5rFvArMDqLVrR9hX0LdCSsH7EGE+bR3r7wuQEN +BFjmORgBCACk+vDZrIXQuFXEYToZVwb2attzbbJJCqD71vmZTLsW0QxuPKRgbcYY +zp4K4lVBnHhFrF8MOUOxJ7kQWIJZMZFt+BDcptCYurbD2H4W2xvnWViiC+LzCMzz +iMJT6165uefL4JHTDPxC2fFiM9yrc72LmylJNkM/vepT128J5Qv0gRUaQbHiQuS6 +Dm/+WRnUfx3i89SV4mnBxb/Ta93GVqoOciWwzWSnwEnWYAvOb95JL4U7c5J5f/+c +KnQDHsW7sIiIdscsWzvgf6qs2Ra1Zrt7Fdk4+ZS2f/adagLhDO1C24sXf5XfMk5m +L0OGwZSr9m5s17VXxfspgU5ugc8kBJfzABEBAAE= +=WCfs +-----END PGP PUBLIC KEY BLOCK----- + diff --git a/tests/data/keys/CVE-2021-3521-nosubsig-last.asc b/tests/data/keys/CVE-2021-3521-nosubsig-last.asc new file mode 100755 index 000000000..aea00f9d7 --- /dev/null +++ b/tests/data/keys/CVE-2021-3521-nosubsig-last.asc @@ -0,0 +1,25 @@ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: rpm-4.17.90 (NSS-3) + +mQENBFjmORgBCAC7TMEk6wnjSs8Dr4yqSScWdU2pjcqrkTxuzdWvowcIUPZI0w/g +HkRqGd4apjvY2V15kjL10gk3QhFP3pZ/9p7zh8o8NHX7aGdSGDK7NOq1eFaErPRY +91LW9RiZ0lbOjXEzIL0KHxUiTQEmdXJT43DJMFPyW9fkCWg0OltiX618FUdWWfI8 +eySdLur1utnqBvdEbCUvWK2RX3vQZQdvEBODnNk2pxqTyV0w6VPQ96W++lF/5Aas +7rUv3HIyIXxIggc8FRrnH+y9XvvHDonhTIlGnYZN4ubm9i4y3gOkrZlGTrEw7elQ +1QeMyG2QQEbze8YjpTm4iLABCBrRfPRaQpwrABEBAAG0IXJwbS5vcmcgUlNBIHRl +c3RrZXkgPHJzYUBycG0ub3JnPokBNwQTAQgAIQUCWOY5GAIbAwULCQgHAgYVCAkK +CwIEFgIDAQIeAQIXgAAKCRBDRFkeGWTF/MxxCACnjqFL+MmPh9W9JQKT2DcLbBzf +Cqo6wcEBoCOcwgRSk8dSikhARoteoa55JRJhuMyeKhhEAogE9HRmCPFdjezFTwgB +BDVBpO2dZ023mLXDVCYX3S8pShOgCP6Tn4wqCnYeAdLcGg106N4xcmgtcssJE+Pr +XzTZksbZsrTVEmL/Ym+R5w5jBfFnGk7Yw7ndwfQsfNXQb5AZynClFxnX546lcyZX +fEx3/e6ezw57WNOUK6WT+8b+EGovPkbetK/rGxNXuWaP6X4A/QUm8O98nCuHYFQq ++mvNdsCBqGf7mhaRGtpHk/JgCn5rFvArMDqLVrR9hX0LdCSsH7EGE+bR3r7wuQEN +BFjmORgBCACk+vDZrIXQuFXEYToZVwb2attzbbJJCqD71vmZTLsW0QxuPKRgbcYY +zp4K4lVBnHhFrF8MOUOxJ7kQWIJZMZFt+BDcptCYurbD2H4W2xvnWViiC+LzCMzz +iMJT6165uefL4JHTDPxC2fFiM9yrc72LmylJNkM/vepT128J5Qv0gRUaQbHiQuS6 +Dm/+WRnUfx3i89SV4mnBxb/Ta93GVqoOciWwzWSnwEnWYAvOb95JL4U7c5J5f/+c +KnQDHsW7sIiIdscsWzvgf6qs2Ra1Zrt7Fdk4+ZS2f/adagLhDO1C24sXf5XfMk5m +L0OGwZSr9m5s17VXxfspgU5ugc8kBJfzABEBAAE= +=WCfs +-----END PGP PUBLIC KEY BLOCK----- + diff --git a/tests/data/keys/CVE-2021-3521-nosubsig.asc b/tests/data/keys/CVE-2021-3521-nosubsig.asc new file mode 100755 index 000000000..3a2e7417f --- /dev/null +++ b/tests/data/keys/CVE-2021-3521-nosubsig.asc @@ -0,0 +1,37 @@ +-----BEGIN PGP PUBLIC KEY BLOCK----- +Version: rpm-4.17.90 (NSS-3) + +mQENBFjmORgBCAC7TMEk6wnjSs8Dr4yqSScWdU2pjcqrkTxuzdWvowcIUPZI0w/g +HkRqGd4apjvY2V15kjL10gk3QhFP3pZ/9p7zh8o8NHX7aGdSGDK7NOq1eFaErPRY +91LW9RiZ0lbOjXEzIL0KHxUiTQEmdXJT43DJMFPyW9fkCWg0OltiX618FUdWWfI8 +eySdLur1utnqBvdEbCUvWK2RX3vQZQdvEBODnNk2pxqTyV0w6VPQ96W++lF/5Aas +7rUv3HIyIXxIggc8FRrnH+y9XvvHDonhTIlGnYZN4ubm9i4y3gOkrZlGTrEw7elQ +1QeMyG2QQEbze8YjpTm4iLABCBrRfPRaQpwrABEBAAG0IXJwbS5vcmcgUlNBIHRl +c3RrZXkgPHJzYUBycG0ub3JnPokBNwQTAQgAIQUCWOY5GAIbAwULCQgHAgYVCAkK +CwIEFgIDAQIeAQIXgAAKCRBDRFkeGWTF/MxxCACnjqFL+MmPh9W9JQKT2DcLbBzf +Cqo6wcEBoCOcwgRSk8dSikhARoteoa55JRJhuMyeKhhEAogE9HRmCPFdjezFTwgB +BDVBpO2dZ023mLXDVCYX3S8pShOgCP6Tn4wqCnYeAdLcGg106N4xcmgtcssJE+Pr +XzTZksbZsrTVEmL/Ym+R5w5jBfFnGk7Yw7ndwfQsfNXQb5AZynClFxnX546lcyZX +fEx3/e6ezw57WNOUK6WT+8b+EGovPkbetK/rGxNXuWaP6X4A/QUm8O98nCuHYFQq ++mvNdsCBqGf7mhaRGtpHk/JgCn5rFvArMDqLVrR9hX0LdCSsH7EGE+bR3r7wuQEN +BFjmORgBCACk+vDZrIXQuFXEYToZVwb2attzbbJJCqD71vmZTLsW0QxuPKRgbcYY +zp4K4lVBnHhFrF8MOUOxJ7kQWIJZMZFt+BDcptCYurbD2H4W2xvnWViiC+LzCMzz +iMJT6165uefL4JHTDPxC2fFiM9yrc72LmylJNkM/vepT128J5Qv0gRUaQbHiQuS6 +Dm/+WRnUfx3i89SV4mnBxb/Ta93GVqoOciWwzWSnwEnWYAvOb95JL4U7c5J5f/+c +KnQDHsW7sIiIdscsWzvgf6qs2Ra1Zrt7Fdk4+ZS2f/adagLhDO1C24sXf5XfMk5m +L0OGwZSr9m5s17VXxfspgU5ugc8kBJfzABEBAAG5AQ0EWOY5GAEIAKT68NmshdC4 +VcRhOhlXBvZq23NtskkKoPvW+ZlMuxbRDG48pGBtxhjOngriVUGceEWsXww5Q7En +uRBYglkxkW34ENym0Ji6tsPYfhbbG+dZWKIL4vMIzPOIwlPrXrm558vgkdMM/ELZ +8WIz3KtzvYubKUk2Qz+96lPXbwnlC/SBFRpBseJC5LoOb/5ZGdR/HeLz1JXiacHF +v9Nr3cZWqg5yJbDNZKfASdZgC85v3kkvhTtzknl//5wqdAMexbuwiIh2xyxbO+B/ +qqzZFrVmu3sV2Tj5lLZ/9p1qAuEM7ULbixd/ld8yTmYvQ4bBlKv2bmzXtVfF+ymB +Tm6BzyQEl/MAEQEAAYkBHwQYAQgACQUCWOY5GAIbDAAKCRBDRFkeGWTF/PANB/9j +mifmj6z/EPe0PJFhrpISt9PjiUQCt0IPtiL5zKAkWjHePIzyi+0kCTBF6DDLFxos +3vN4bWnVKT1kBhZAQlPqpJTg+m74JUYeDGCdNx9SK7oRllATqyu+5rncgxjWVPnQ +zu/HRPlWJwcVFYEVXYL8xzfantwQTqefjmcRmBRdA2XJITK+hGWwAmrqAWx+q5xX +Pa8wkNMxVzNS2rUKO9SoVuJ/wlUvfoShkJ/VJ5HDp3qzUqncADfdGN35TDzscngQ +gHvnMwVBfYfSCABV1hNByoZcc/kxkrWMmsd/EnIyLd1Q1baKqc3cEDuC6E6/o4yJ +E4XX4jtDmdZPreZALsiB +=rRop +-----END PGP PUBLIC KEY BLOCK----- + diff --git a/tests/rpmsigdig.at b/tests/rpmsigdig.at index 9df3c5bd8..69382999f 100644 --- a/tests/rpmsigdig.at +++ b/tests/rpmsigdig.at @@ -191,6 +191,34 @@ UNW2iqnN3BA7guhOv6OMiROF1+I7Q5nWT63mQC7IgQ== []) AT_CLEANUP +AT_SETUP([rpmkeys --import invalid keys]) +AT_KEYWORDS([rpmkeys import]) +RPMDB_INIT + +AT_CHECK([ +runroot rpmkeys --import /data/keys/CVE-2021-3521-badbind.asc +], +[1], +[], +[error: /data/keys/CVE-2021-3521-badbind.asc: key 1 import failed.] +) +AT_CHECK([ +runroot rpmkeys --import /data/keys/CVE-2021-3521-nosubsig.asc +], +[1], +[], +[error: /data/keys/CVE-2021-3521-nosubsig.asc: key 1 import failed.] +) + +AT_CHECK([ +runroot rpmkeys --import /data/keys/CVE-2021-3521-nosubsig-last.asc +], +[1], +[], +[error: /data/keys/CVE-2021-3521-nosubsig-last.asc: key 1 import failed.] +) +AT_CLEANUP + # ------------------------------ # Test pre-built package verification AT_SETUP([rpmkeys -K <signed> 1]) |