Signed-off-by: Mathieu Dubois-Briand <[email protected]> --- .../bind/bind/CVE-2022-2795.patch | 67 +++++++++++++++++++ .../bind/bind/CVE-2022-38177.patch | 31 +++++++++ .../bind/bind/CVE-2022-38178.patch | 33 +++++++++ .../recipes-connectivity/bind/bind_9.11.37.bb | 3 + 4 files changed, 134 insertions(+) create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2022-2795.patch create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2022-38177.patch create mode 100644 meta/recipes-connectivity/bind/bind/CVE-2022-38178.patch
diff --git a/meta/recipes-connectivity/bind/bind/CVE-2022-2795.patch b/meta/recipes-connectivity/bind/bind/CVE-2022-2795.patch new file mode 100644 index 000000000000..940c6776d394 --- /dev/null +++ b/meta/recipes-connectivity/bind/bind/CVE-2022-2795.patch @@ -0,0 +1,67 @@ +From 36c878a0124973f29b7ca49e6bb18310f9b2601f Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Micha=C5=82=20K=C4=99pie=C5=84?= <[email protected]> +Date: Thu, 8 Sep 2022 11:11:30 +0200 +Subject: [PATCH 1/3] Bound the amount of work performed for delegations + +Limit the amount of database lookups that can be triggered in +fctx_getaddresses() (i.e. when determining the name server addresses to +query next) by setting a hard limit on the number of NS RRs processed +for any delegation encountered. Without any limit in place, named can +be forced to perform large amounts of database lookups per each query +received, which severely impacts resolver performance. + +The limit used (20) is an arbitrary value that is considered to be big +enough for any sane DNS delegation. + +(cherry picked from commit 3a44097fd6c6c260765b628cd1d2c9cb7efb0b2a) + +Upstream-Status: Backport +CVE: CVE-2022-2795 +Reference to upstream patch: +https://gitlab.isc.org/isc-projects/bind9/-/commit/bf2ea6d8525bfd96a84dad221ba9e004adb710a8 + +Signed-off-by: Mathieu Dubois-Briand <[email protected]> +--- + lib/dns/resolver.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c +index 8ae9a993bbd7..ac9a9ef5d009 100644 +--- a/lib/dns/resolver.c ++++ b/lib/dns/resolver.c +@@ -180,6 +180,12 @@ + */ + #define NS_FAIL_LIMIT 4 + #define NS_RR_LIMIT 5 ++/* ++ * IP address lookups are performed for at most NS_PROCESSING_LIMIT NS RRs in ++ * any NS RRset encountered, to avoid excessive resource use while processing ++ * large delegations. ++ */ ++#define NS_PROCESSING_LIMIT 20 + + /* Number of hash buckets for zone counters */ + #ifndef RES_DOMAIN_BUCKETS +@@ -3318,6 +3324,7 @@ fctx_getaddresses(fetchctx_t *fctx, bool badcache) { + bool need_alternate = false; + bool all_spilled = true; + unsigned int no_addresses = 0; ++ unsigned int ns_processed = 0; + + FCTXTRACE5("getaddresses", "fctx->depth=", fctx->depth); + +@@ -3504,6 +3511,11 @@ fctx_getaddresses(fetchctx_t *fctx, bool badcache) { + + dns_rdata_reset(&rdata); + dns_rdata_freestruct(&ns); ++ ++ if (++ns_processed >= NS_PROCESSING_LIMIT) { ++ result = ISC_R_NOMORE; ++ break; ++ } + } + if (result != ISC_R_NOMORE) { + return (result); +-- +2.34.1 + diff --git a/meta/recipes-connectivity/bind/bind/CVE-2022-38177.patch b/meta/recipes-connectivity/bind/bind/CVE-2022-38177.patch new file mode 100644 index 000000000000..0ef87fd260c9 --- /dev/null +++ b/meta/recipes-connectivity/bind/bind/CVE-2022-38177.patch @@ -0,0 +1,31 @@ +From ef3d1a84ff807eea27b4fef601a15932c5ffbfbf Mon Sep 17 00:00:00 2001 +From: Mark Andrews <[email protected]> +Date: Thu, 11 Aug 2022 15:15:34 +1000 +Subject: [PATCH 2/3] Free eckey on siglen mismatch + +Upstream-Status: Backport +CVE: CVE-2022-38177 +Reference to upstream patch: +https://gitlab.isc.org/isc-projects/bind9/-/commit/5b2282afff760b1ed3471f6666bdfe8e1d34e590 + +Signed-off-by: Mathieu Dubois-Briand <[email protected]> +--- + lib/dns/opensslecdsa_link.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/lib/dns/opensslecdsa_link.c b/lib/dns/opensslecdsa_link.c +index 83b5b51cd78c..7576e04ac635 100644 +--- a/lib/dns/opensslecdsa_link.c ++++ b/lib/dns/opensslecdsa_link.c +@@ -224,7 +224,7 @@ opensslecdsa_verify(dst_context_t *dctx, const isc_region_t *sig) { + siglen = DNS_SIG_ECDSA384SIZE; + + if (sig->length != siglen) +- return (DST_R_VERIFYFAILURE); ++ DST_RET(DST_R_VERIFYFAILURE); + + if (!EVP_DigestFinal_ex(evp_md_ctx, digest, &dgstlen)) + DST_RET (dst__openssl_toresult3(dctx->category, +-- +2.34.1 + diff --git a/meta/recipes-connectivity/bind/bind/CVE-2022-38178.patch b/meta/recipes-connectivity/bind/bind/CVE-2022-38178.patch new file mode 100644 index 000000000000..e0b398e24abf --- /dev/null +++ b/meta/recipes-connectivity/bind/bind/CVE-2022-38178.patch @@ -0,0 +1,33 @@ +From 65f5b2f0162d5d2ab25f463aa14a8bae71ace3d9 Mon Sep 17 00:00:00 2001 +From: Mark Andrews <[email protected]> +Date: Thu, 11 Aug 2022 15:28:13 +1000 +Subject: [PATCH 3/3] Free ctx on invalid siglen + +(cherry picked from commit 6ddb480a84836641a0711768a94122972c166825) + +Upstream-Status: Backport +CVE: CVE-2022-38178 +Reference to upstream patch: +https://gitlab.isc.org/isc-projects/bind9/-/commit/1af23378ebb11da2eb0f412e4563d6 + +Signed-off-by: Mathieu Dubois-Briand <[email protected]> +--- + lib/dns/openssleddsa_link.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/lib/dns/openssleddsa_link.c b/lib/dns/openssleddsa_link.c +index 8b115ec283f0..b4fcd607c131 100644 +--- a/lib/dns/openssleddsa_link.c ++++ b/lib/dns/openssleddsa_link.c +@@ -325,7 +325,7 @@ openssleddsa_verify(dst_context_t *dctx, const isc_region_t *sig) { + siglen = DNS_SIG_ED448SIZE; + + if (sig->length != siglen) +- return (DST_R_VERIFYFAILURE); ++ DST_RET(ISC_R_NOTIMPLEMENTED); + + isc_buffer_usedregion(buf, &tbsreg); + +-- +2.34.1 + diff --git a/meta/recipes-connectivity/bind/bind_9.11.37.bb b/meta/recipes-connectivity/bind/bind_9.11.37.bb index afc8cf0b3b0c..2fca28e684a1 100644 --- a/meta/recipes-connectivity/bind/bind_9.11.37.bb +++ b/meta/recipes-connectivity/bind/bind_9.11.37.bb @@ -19,6 +19,9 @@ SRC_URI = "https://ftp.isc.org/isc/bind9/${PV}/${BPN}-${PV}.tar.gz \ file://0001-configure.in-remove-useless-L-use_openssl-lib.patch \ file://0001-named-lwresd-V-and-start-log-hide-build-options.patch \ file://0001-avoid-start-failure-with-bind-user.patch \ + file://CVE-2022-2795.patch \ + file://CVE-2022-38177.patch \ + file://CVE-2022-38178.patch \ " SRC_URI[sha256sum] = "0d8efbe7ec166ada90e46add4267b7e7c934790cba9bd5af6b8380a4fbfb5aff" -- 2.34.1
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