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* resolv: Remove SUNSECURITY preprocessor conditionalsFlorian Weimer2016-04-281-5/+0
| | | | The macro is never defined.
* resolv: Remove RESOLVSORT preprocess conditionalsFlorian Weimer2016-04-281-4/+0
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* nss_dns: Skip over non-PTR records in the netent code [BZ #19868]Florian Weimer2016-04-271-2/+18
| | | | | This requires additional checks for the RDATA length and the availability of record metadata.
* nss_dns: Remove custom offsetof macro definitionFlorian Weimer2016-04-271-3/+1
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* nss_dns: Check address length before creating addrinfo result [BZ #19831]Florian Weimer2016-04-271-20/+39
| | | | | | | | | Previously, we allocated room in the result space before the check, leaving uninitialized data there in case the check failed. This also consolidates the behavior between single (A or AAAA) and dual (A and AAAA in parallel) queries. Single queries checked the record length against the QTYPE, not the RRTYPE.
* resolv, nss_dns: Remove remaining syslog logging [BZ #19862]Florian Weimer2016-04-271-22/+0
| | | | The fix for bug 14841 only removed part of the logging.
* nss_dns: Validate RDATA length against packet length [BZ #19830]Florian Weimer2016-04-272-3/+28
| | | | | In _nss_dns_getcanonname_r, a check for the availability of RR metadata was missing as well.
* nss_dns: Fix assertion failure in _nss_dns_getcanonname_r [BZ #19865]Florian Weimer2016-04-111-0/+7
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* CVE-2016-3075: Stack overflow in _nss_dns_getnetbyname_r [BZ #19879]Florian Weimer2016-03-291-4/+1
| | | | | The defensive copy is not needed because the name may not alias the output buffer.
* CVE-2015-7547: getaddrinfo() stack-based buffer overflow (Bug 18665).Carlos O'Donell2016-02-161-2/+109
| | | | | | | | | | | | | | | | | | | | * A stack-based buffer overflow was found in libresolv when invoked from libnss_dns, allowing specially crafted DNS responses to seize control of execution flow in the DNS client. The buffer overflow occurs in the functions send_dg (send datagram) and send_vc (send TCP) for the NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC family. The use of AF_UNSPEC triggers the low-level resolver code to send out two parallel queries for A and AAAA. A mismanagement of the buffers used for those queries could result in the response of a query writing beyond the alloca allocated buffer created by _nss_dns_gethostbyname4_r. Buffer management is simplified to remove the overflow. Thanks to the Google Security Team and Red Hat for reporting the security impact of this issue, and Robert Holiday of Ciena for reporting the related bug 18665. (CVE-2015-7547) See also: https://sourceware.org/ml/libc-alpha/2016-02/msg00416.html https://sourceware.org/ml/libc-alpha/2016-02/msg00418.html
* Update copyright dates with scripts/update-copyrights.Joseph Myers2016-01-043-3/+3
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* Record TTL also for DNS PTR queries (bug 18513)Andreas Schwab2015-06-221-0/+6
| | | | This allows nscd to manage proper TTL for GETHOSTBYADDR[v6] requests.
* CVE-2015-1781: resolv/nss_dns/dns-host.c buffer overflow [BZ#18287]Arjun Shankar2015-04-211-1/+2
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* Skip logging for DNSSEC responses [BZ 14841]Siddhesh Poyarekar2015-02-241-15/+8
| | | | | | | | | | | | | | DNSSEC defines a number of response types that one me expect when the DO bit is set. We don't process any of them, but since we do allow setting the DO bit, skip them without logging an error since it is only a nuisance. Tested on x86_64. [BZ #14841] * resolv/gethnamaddr.c (getanswer): Skip logging if RES_USE_DNSSEC is set. * resolv/nss_dns/dns-host.c (getanswer_r): Likewise.
* Update copyright dates with scripts/update-copyrights.Joseph Myers2015-01-023-3/+3
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* Avoid infinite loop in nss_dns getnetbyname [BZ #17630]Florian Weimer2014-12-161-2/+2
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* Remove MULTI_PTRS_ARE_ALIASES in dns-hosts.cSiddhesh Poyarekar2014-07-011-22/+2
| | | | | | | | | | | | | | | | The code in gethnamaddr.c for gethostbyaddr used and set this macro to allow multiple PTR records to be added as aliases. This was useful for gethostbyaddr since it returns a hostent structure, which can return aliases. The gethnamaddr.c source however is unused in glibc since pretty much forever. Instead, the DNS lookup bits for gethostbyaddr (as well as getnameinfo) are implemented in dns-hosts.c and in that implementation all but one (the first one) of the multiple PTR records are ignored. Since gethnamaddr.c is essentially dead code, ignore that implementation and replace the MULTI_PTRS_ARE_ALIASES bit with a comment mentioning that bind adds PTR records as aliases while we don't.
* Properly fix memory leak in _nss_dns_gethostbyname4_r with big DNS answerAndreas Schwab2014-02-193-16/+13
| | | | | Instead of trying to guess whether the second buffer needs to be freed set a flag at the place it is allocated
* Deduplicate resolv/nss_dns/dns-host.cOndřej Bílka2014-02-161-10/+7
| | | | | In resolv/nss_dns/dns-host.c one of code path duplicated code after that. We merge these paths.
* Fix memory leak in _nss_dns_gethostbyname4_r with big DNS answerAndreas Schwab2014-02-131-2/+10
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* Use glibc_likely instead __builtin_expect.Ondřej Bílka2014-02-102-23/+23
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* Update copyright notices with scripts/update-copyrightsAllan McRae2014-01-013-3/+3
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* Avoid use of "register" as optimization hint.Joseph Myers2013-06-071-2/+2
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* Add #include <stdint.h> for uint[32|64]_t usage (except installed headers).Ryan S. Arnold2013-05-162-0/+2
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* Update copyright notices with scripts/update-copyrights.Joseph Myers2013-01-023-3/+3
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* Add script to update copyright notices and reformat some to facilitate its use.Joseph Myers2013-01-011-2/+1
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* Return EAI_SYSTEM if we're out of file descriptorsSiddhesh Poyarekar2012-11-191-4/+21
| | | | Resolves BZ #14719.
* Avoid duplicate DNS requests if answer is longer than a implementationJeroen van Bemmel2012-07-121-4/+0
| | | | | | | | | | | | | | | | limit [BZ #14307] * sysdeps/posix/getaddrinfo.c (gaih_inet): Increase the size of the temporary buffer used to invoke __gethostbyname2_r, __gethostbyaddr_r and gethostbyname4_r to make room for struct host_data / struct gaih_addrtuple. * resolv/nss_dns/dns-host.c (global scope): Move definition of implementation constants MAX_NR_ALIASES and MAX_NR_ADDRS to header file nss/nsswitch.h. * nss/nsswitch.h (global scope): Add definition of implementation constants MAX_NR_ALIASES and MAX_NR_ADDRS (moved from resolv/nss_dns/dns-host.c).
* Merge copyright years in resolv/nss_dns/dns-host.cSiddhesh Poyarekar2012-03-311-1/+1
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* Consider TTL of CNAME record and return minimum TTL in the chainSiddhesh Poyarekar2012-03-301-3/+18
| | | | | | | | | [BZ #13928] A DNS request consists of multiple resources combined into a single hostent, including multiple CNAME records that may have been assigned different TTL values. In such a case, nscd should take the least TTL among all of the resources as the timeout for the hostent before it is reloaded in its cache so that the hostent remains stale in the database for the least amount of time.
* * resolv/nss_dns/dns-host.c: Update copyright year.Jeff Law2012-03-301-1/+1
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* [BZ #13760]Jeff Law2012-03-281-1/+7
| | | | | | * resolv/nss_dns/dns-host.c (gaih_getanswer): Look for errno in the right place. Discard and retry query if response is larger than input buffer size.
* Replace FSF snail mail address with URLs.Paul Eggert2012-02-093-9/+6
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* Quash some new warnings from GCC 4.6.Roland McGrath2011-06-101-5/+2
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* Don't ignore zero TTL in DNS answersAndreas Schwab2010-11-251-4/+3
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* Fix crash on reloading of gai data in nscd.Ulrich Drepper2010-04-091-14/+2
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* Handle DNS timeouts in old-style lookkup code.Ulrich Drepper2010-04-051-6/+12
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* Handle running out of buffer space with IPv6 mapping enabled.Andreas Schwab2009-11-101-2/+4
| | | | | | With big DNS answers like the one you get for goodtimesdot.com you can get a truncated address list if IPv6 mapping is enabled. Instead tell the caller to resize the buffer.
* * resolv/res_hconf.c (_res_hconf_trim_domain): Use strcasecmpUlrich Drepper2009-04-071-1/+1
| | | | | instead of __strcasecmp. * resolv/nss_dns/dns-host.c (getanswer_r): Likewise.
* * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr2_r): Check andUlrich Drepper2009-01-081-1/+14
| | | | adjust the buffer alignment.
* * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyname3_r): RecognizeUlrich Drepper2008-12-031-4/+16
| | | | | | | | | ESRCH return value. (_nss_dns_gethostbyname4_r): Likewise. * resolv/res_init.c (__res_vinit): Initialize nscount to zero. * sysdeps/posix/getaddrinfo.c (gaih_inet): In case we use gethostbyname4_r, we don't have a separate IPv6 status, so copy the no_data variable.
* (gaih_getanswer_slice): Don't abort for unknown request types for now.Ulrich Drepper2008-11-121-0/+7
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* * Versions.def: Add GLIBC_2.9 to libresolv.Ulrich Drepper2008-08-012-10/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | * include/resolv.h: Remove hidden proto declarations for __ns_* functions. Add them for __dn_count_labels and __p_secstodate. * include/arpa/nameser.h: Add a number of hidden proto declarations. Define ns_msg_getflags macro here. * resolv/res_debug.c: Add hidden definition for __dn_count_labels and __p_secstodate. * resolv/Versions: Export functions from <arpa/nameser.h> from libresolv in version GLIBC_2.9. * resolv/ns_name.c: Integrate changes from bind 9.5.0. Add necessary hidden definitions. * resolv/ns_netint.c: Likewise. * resolv/ns_parse.c: Likewise. * resolv/ns_print.c: Likewise. * resolv/ns_samedomain.c: Likewise. * resolv/ns_ttl.c: Likewise. * resolv/arpa/nameser_compat.h: Likewise. * resolv/arpa/nameser.h: Likewise. Remove macros which redirect function calls. * resolv/nss_dns/dns-canon.c (_nss_dns_getcanonname_r): Use __ns_get16 instead of ns_get16. * resolv/nss_dns/dns-host.c (getanswer_r): Use __ns_get16 and __ns_get32 instead of ns_get16 and ns_get32 respectively. (gaih_getanswer_slice): Likewise. * resolv/Makefile (libresolv-routines): Add ns_date. * resolv/ns_date.c: New file.
* * resolv/res_send.c (__libc_res_nsend): Take additional parameter.cvs/fedora-glibc-20080728T2320Ulrich Drepper2008-07-283-25/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use it instead of locally defined resplen2 variable. (res_nsend): Adjust for __libc_res_nsend interface change. (send_vc): Initialize *resplen2 if necessary. Read length of package into an appropriately aligned variable. Store converted length in new variable and use it appropriately. Add branch prediction help. * resolv/res_query.c (__libc_res_nquery): Take additional parameter and pass it on to __libc_res_nsend. Adjust all callers. (__libc_res_nsearch): Likewise. (__libc_res_nqeurydomain): Likewise. * resolv/nss_dns/dns-host.c: Adjust for __libc_res_nsearch interface change. (_nss_dns_gethostbyname4): Don't unconditionally allocate tmp array. Define resplen2 variable and pass it to __libc_res_nsearch and then to gaih_getanswer. (getanswer_r): In case of incorrect DNS data don't overread buffer. Add branch prediction. (gaih_getanswer_slice): Likewise. Check for invalid data types. (gaih_getanswer): Don't decode second slice if first one failed due to a too small buffer. Don't let not found status of second decoder shadow results of the first. * resolv/gethnamaddr.c (gethostbyname2): Adjust for __libc_res_nsearch and __libc_res_nquery interface changes (gethostbyaddr): Adjust for __libc_res_nquery interface change. * include/resolv.h: Adjust prototypes for __libc_res_nquery, __libc_res_nsearch, and __libc_res_nsend. * resolv/nss_dns/dns-canon.c: Adjust for __libc_res_nquery interface change. * resolv/nss_dns/dns-network.c: Adjust for __libc_res_nquery and __libc_res_nsearch interface changes.
* * resolv/nss_dns/dns-host.c (gaih_getanswer): Don'tUlrich Drepper2008-06-131-9/+11
| | | | unconditionally use second gaih_getanswer_slice result.
* * resolv/nss_dns/dns-host.c (gaih_getanswer_slice): Also log andUlrich Drepper2008-06-101-2/+3
| | | | | ignore T_DNAME messages. * resolv/arpa/nameser_compat.h (T_DNAME): Define.
* * resolv/nss_dns/dns-host.c (gaih_getanswer_slice): If there areUlrich Drepper2008-05-171-5/+11
| | | | | | | | no answers return NSS_STATUS_NOTFOUND. (gaih_getanswer): Don't call gaih_getanswer_slice if the answer buffer does not have any content. * nscd/servicescache.c: Likewise.
* * include/resolv.h: Adjust __libc_res_nquery and __libc_res_nsendUlrich Drepper2008-05-103-14/+333
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | prototypes. * include/arpa/nameser_compat.h: Define T_UNSPEC. * nis/Versions (libnss_nis): Export _nss_nis_gethostbyname4_r. (libnss_nisplus): Export _nss_nisplus_gethostbyname4_r. * nis/nss_nis/nis-hosts.c (LINE_PARSER): Change to also handle af==AF_UNSPEC. (_nss_nis_gethostbyname4_r): New function. * nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_parse_hostent): Change to also handle af==AF_UNSPEC. (get_tablename): New function. Use it to avoid duplication. (_nss_nisplus_gethostbyname4_r): New function. * nscd/aicache.c (addhstaiX): Use gethostbyname4_r function is available. * nss/Versions (libnss_files): Export _nss_files_gethostbyname4_r. * nss/nss.h: Define struct gaih_addrtuple. * nss/nss_files/files-hosts.c (LINE_PARSER): Change to also handle af==AF_UNSPEC. (_nss_files_gethostbyname4_r): New function. * resolv/Versions (libnss_dns): Export _nss_dns_gethostbyname4_r. * resolv/gethnmaddr.c: Adjust __libc_res_nsearch and __libc_res_nquery calls. * resolv/res_query.c (__libc_res_nquery): Take two additional parameters for second answer buffer. Handle type=T_UNSPEC to mean look up IPv4 and IPv6. Change all callers. * resolv/res_send.c (__libc_res_nsend): Take five aditional parameters for an additional query and answer buffer. Pass to send_vc and send_dg. (send_vc): Send possibly two requests and receive two answers. (send_dg): Likewise. * resolv/nss_dns/dns-host.c: Adjust calls to __libc_res_nsearch and __libc_res_nquery. (_nss_dns_gethostbyname4_r): New function. (gaih_getanswer_slice): Likewise. (gaih_getanswer): Likewise. * resolv/nss_dns/dns-canon.c (_nss_dns_getcanonname_r): Adjust __libc_res_nquery call. * resolv/nss_dns/dns-network.c (_nss_dns_getnetbyaddr_r): Likewise. (_nss_dns_getnetbyname_r): Adjust __libc_res_nsearch call. * sysdeps/posix/getaddrinfo.c: Use gethostbyname4_r function is available.
* [BZ #5790]Ulrich Drepper2008-03-041-6/+2
| | | | | | | | 2008-02-25 Jakub Jelinek <jakub@redhat.com> [BZ #5790] * resolv/nss_dns/dns-host.c (_nss_dns_gethostbyaddr2_r): Don't overwrite *h_errnop/*errnop values from getanswer_r in case of failure.
* * resolv/Versions [libresolv] (GLIBC_PRIVATE): AddUlrich Drepper2007-10-301-4/+23
| | | | | | | | _nss_dns_getnetbyaddr2_r. * resolv/nss_dns/dns-host.c: Define _nss_dns_getnetbyaddr2_r. Pass extra parameter to getanswer_r. (_nss_dns_getnetbyaddr_r): Now a wrapper around _nss_dns_getnetbyaddr2_r.