From d256eea48143b3e2c3df63d888c78a4ed5c5c41d Mon Sep 17 00:00:00 2001 From: CentOS Sources Date: Fri, 11 Nov 2022 04:10:45 +0000 Subject: [PATCH] import bind9.16-9.16.23-0.11.el8 --- SOURCES/bind-9.16-CVE-2022-2795.patch | 60 +++++++++++++++++++++++++++ SPECS/bind9.16.spec | 11 ++++- 2 files changed, 69 insertions(+), 2 deletions(-) create mode 100644 SOURCES/bind-9.16-CVE-2022-2795.patch diff --git a/SOURCES/bind-9.16-CVE-2022-2795.patch b/SOURCES/bind-9.16-CVE-2022-2795.patch new file mode 100644 index 0000000..b67c8e9 --- /dev/null +++ b/SOURCES/bind-9.16-CVE-2022-2795.patch @@ -0,0 +1,60 @@ +From bf2ea6d8525bfd96a84dad221ba9e004adb710a8 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Micha=C5=82=20K=C4=99pie=C5=84?= +Date: Thu, 8 Sep 2022 11:11:30 +0200 +Subject: [PATCH] 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) +--- + lib/dns/resolver.c | 12 ++++++++++++ + 1 file changed, 12 insertions(+) + +diff --git a/lib/dns/resolver.c b/lib/dns/resolver.c +index d2cf14bbc8..73a0ee9f77 100644 +--- a/lib/dns/resolver.c ++++ b/lib/dns/resolver.c +@@ -195,6 +195,12 @@ + */ + #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 +@@ -3711,6 +3717,7 @@ 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); + +@@ -3902,6 +3909,11 @@ normal_nses: + + 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); +-- +2.37.3 + diff --git a/SPECS/bind9.16.spec b/SPECS/bind9.16.spec index a2dbf28..8d3cb2f 100644 --- a/SPECS/bind9.16.spec +++ b/SPECS/bind9.16.spec @@ -57,7 +57,7 @@ Summary: The Berkeley Internet Name Domain (BIND) DNS (Domain Name System) serv Name: bind9.16 License: MPLv2.0 Version: 9.16.23 -Release: 0.9%{?dist}.1 +Release: 0.11%{?dist} Epoch: 32 Url: https://www.isc.org/downloads/bind/ # @@ -114,6 +114,9 @@ Patch174:bind-9.16-CVE-2021-25220-test.patch Patch175:bind-9.16-CVE-2022-3080.patch Patch176:bind-9.16-CVE-2022-38177.patch Patch177:bind-9.16-CVE-2022-38178.patch +# https://gitlab.isc.org/isc-projects/bind9/-/merge_requests/6793 +# https://gitlab.isc.org/isc-projects/bind9/commit/bf2ea6d8525bfd96a84dad221ba9e004adb710a8 +Patch178:bind-9.16-CVE-2022-2795.patch %{?systemd_ordering} Requires: coreutils @@ -418,6 +421,7 @@ in HTML and PDF format. %patch175 -p1 -b .CVE-2022-3080 %patch176 -p1 -b .CVE-2022-38177 %patch177 -p1 -b .CVE-2022-38178 +%patch178 -p1 -b .CVE-2022-2795 %if %{with PKCS11} %patch135 -p1 -b .config-pkcs11 @@ -1137,7 +1141,10 @@ fi; %endif %changelog -* Thu Sep 22 2022 Petr Menšík - 32:9.16.23-0.9.1 +* Tue Oct 04 2022 Petr Menšík - 32:9.16.23-0.11 +- Bound the amount of work performed for delegations (CVE-2022-2795) + +* Thu Sep 22 2022 Petr Menšík - 32:9.16.23-0.10 - Fix possible serve-stale related crash (CVE-2022-3080) - Fix memory leak in ECDSA verify processing (CVE-2022-38177) - Fix memory leak in EdDSA verify processing (CVE-2022-38178)