Bugzilla – Bug 994749
VUL-0: CVE-2016-2181: openssl: Fix DTLS replay protection
Last modified: 2022-02-16 21:25:53 UTC
via openssl git, 3 commits that probably belong together 5802758eb480c5f14a768f6a061df1dd20aec8c4 Author: Matt Caswell <matt@openssl.org> Date: Wed Aug 17 17:55:36 2016 +0100 Update function error code A function error code needed updating due to merge issues. Reviewed-by: Richard Levitte <levitte@openssl.org> commit b77ab018b79a00f789b0fb85596b446b08be4c9d Author: Matt Caswell <matt@openssl.org> Date: Tue Jul 5 12:04:37 2016 +0100 Fix DTLS replay protection The DTLS implementation provides some protection against replay attacks in accordance with RFC6347 section 4.1.2.6. A sliding "window" of valid record sequence numbers is maintained with the "right" hand edge of the window set to the highest sequence number we have received so far. Records that arrive that are off the "left" hand edge of the window are rejected. Records within the window are checked against a list of records received so far. If we already received it then we also reject the new record. If we have not already received the record, or the sequence number is off the right hand edge of the window then we verify the MAC of the record. If MAC verification fails then we discard the record. Otherwise we mark the record as received. If the sequence number was off the right hand edge of the window, then we slide the window along so that the right hand edge is in line with the newly received sequence number. Records may arrive for future epochs, i.e. a record from after a CCS being sent, can arrive before the CCS does if the packets get re-ordered. As we have not yet received the CCS we are not yet in a position to decrypt or validate the MAC of those records. OpenSSL places those records on an unprocessed records queue. It additionally updates the window immediately, even though we have not yet verified the MAC. This will only occur if currently in a handshake/renegotiation. This could be exploited by an attacker by sending a record for the next epoch (which does not have to decrypt or have a valid MAC), with a very large sequence number. This means the right hand edge of the window is moved very far to the right, and all subsequent legitimate packets are dropped causing a denial of service. A similar effect can be achieved during the initial handshake. In this case there is no MAC key negotiated yet. Therefore an attacker can send a message for the current epoch with a very large sequence number. The code will process the record as normal. If the hanshake message sequence number (as opposed to the record sequence number that we have been talking about so far) is in the future then the injected message is bufferred to be handled later, but the window is still updated. Therefore all subsequent legitimate handshake records are dropped. This aspect is not considered a security issue because there are many ways for an attacker to disrupt the initial handshake and prevent it from completing successfully (e.g. injection of a handshake message will cause the Finished MAC to fail and the handshake to be aborted). This issue comes about as a result of trying to do replay protection, but having no integrity mechanism in place yet. Does it even make sense to have replay protection in epoch 0? That issue isn't addressed here though. This addressed an OCAP Audit issue. CVE-2016-2181 Reviewed-by: Richard Levitte <levitte@openssl.org> commit fa75569758298e2930c78989b516cac937118acc Author: Matt Caswell <matt@openssl.org> Date: Tue Jul 5 11:46:26 2016 +0100 Fix DTLS unprocessed records bug During a DTLS handshake we may get records destined for the next epoch arrive before we have processed the CCS. In that case we can't decrypt or verify the record yet, so we buffer it for later use. When we do receive the CCS we work through the queue of unprocessed records and process them. Unfortunately the act of processing wipes out any existing packet data that we were still working through. This includes any records from the new epoch that were in the same packet as the CCS. We should only process the buffered records if we've not got any data left.
(tl;dr remote denial of service in some dtls phases)
bugbot adjusting priority
This is an autogenerated message for OBS integration: This bug (994749) was mentioned in https://build.opensuse.org/request/show/429766 Factory / openssl
This is an autogenerated message for OBS integration: This bug (994749) was mentioned in https://build.opensuse.org/request/show/429845 13.2 / openssl
SUSE-SU-2016:2387-1: An update that solves 11 vulnerabilities and has 6 fixes is now available. Category: security (important) Bug References: 979475,982575,982745,983249,988591,990419,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: SUSE Linux Enterprise Server for SAP 12 (src): openssl-1.0.1i-27.21.1 SUSE Linux Enterprise Server 12-LTSS (src): openssl-1.0.1i-27.21.1
This is an autogenerated message for OBS integration: This bug (994749) was mentioned in https://build.opensuse.org/request/show/430498 Factory / openssl
openSUSE-SU-2016:2391-1: An update that solves 11 vulnerabilities and has 5 fixes is now available. Category: security (important) Bug References: 979475,982575,983249,988591,990419,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: openSUSE 13.2 (src): openssl-1.0.1k-2.39.1
SUSE-SU-2016:2394-1: An update that solves 11 vulnerabilities and has 6 fixes is now available. Category: security (important) Bug References: 979475,982575,982745,983249,988591,990419,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: SUSE Linux Enterprise Software Development Kit 12-SP1 (src): openssl-1.0.1i-52.1 SUSE Linux Enterprise Server 12-SP1 (src): openssl-1.0.1i-52.1 SUSE Linux Enterprise Desktop 12-SP1 (src): openssl-1.0.1i-52.1
openSUSE-SU-2016:2407-1: An update that solves 11 vulnerabilities and has 6 fixes is now available. Category: security (important) Bug References: 979475,982575,982745,983249,988591,990419,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: openSUSE Leap 42.1 (src): openssl-1.0.1i-18.1
An update workflow for this issue was started. This issue was rated as important. Please submit fixed packages until 2016-10-05. When done, reassign the bug to security-team@suse.de. https://swamp.suse.de/webswamp/wf/63071
SUSE-SU-2016:2458-1: An update that solves 10 vulnerabilities and has four fixes is now available. Category: security (important) Bug References: 979475,982575,983249,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: SUSE Studio Onsite 1.3 (src): openssl-0.9.8j-0.102.2 SUSE OpenStack Cloud 5 (src): openssl-0.9.8j-0.102.2 SUSE Manager Proxy 2.1 (src): openssl-0.9.8j-0.102.2 SUSE Manager 2.1 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Software Development Kit 11-SP4 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Server 11-SP4 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Server 11-SP3-LTSS (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Server 11-SP2-LTSS (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Point of Sale 11-SP3 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Debuginfo 11-SP4 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Debuginfo 11-SP3 (src): openssl-0.9.8j-0.102.2 SUSE Linux Enterprise Debuginfo 11-SP2 (src): openssl-0.9.8j-0.102.2
SUSE-SU-2016:2468-1: An update that solves 10 vulnerabilities and has four fixes is now available. Category: security (important) Bug References: 979475,982575,983249,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: SUSE Linux Enterprise Server for SAP 12-SP1 (src): compat-openssl098-0.9.8j-102.1 SUSE Linux Enterprise Module for Legacy Software 12 (src): compat-openssl098-0.9.8j-102.1 SUSE Linux Enterprise Desktop 12-SP1 (src): compat-openssl098-0.9.8j-102.1
SUSE-SU-2016:2469-1: An update that solves 11 vulnerabilities and has 5 fixes is now available. Category: security (important) Bug References: 979475,982575,982745,983249,990419,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: SUSE Linux Enterprise Server 11-SECURITY (src): openssl1-1.0.1g-0.52.1
all reeased
openSUSE-SU-2016:2537-1: An update that solves 10 vulnerabilities and has four fixes is now available. Category: security (important) Bug References: 979475,982575,983249,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306 Sources used: openSUSE Leap 42.1 (src): compat-openssl098-0.9.8j-15.1
openSUSE-SU-2018:0458-1: An update that solves 16 vulnerabilities and has 12 fixes is now available. Category: security (important) Bug References: 1001148,1009528,1019334,1022085,1022086,1022271,982268,982575,983249,984323,990207,990392,990419,990428,991193,991877,992120,993819,994749,994844,995075,995324,995359,995377,998190,999665,999666,999668 CVE References: CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306,CVE-2016-7052,CVE-2016-7055,CVE-2016-7056,CVE-2017-3731,CVE-2017-3732 Sources used: openSUSE Leap 42.3 (src): openssl-steam-1.0.2k-4.3.1
SUSE-FU-2022:0445-1: An update that solves 183 vulnerabilities, contains 21 features and has 299 fixes is now available. Category: feature (moderate) Bug References: 1000080,1000117,1000194,1000677,1000742,1001148,1001912,1002585,1002895,1003091,1005246,1009528,1010874,1010966,1011936,1015549,1019637,1021641,1022085,1022086,1022271,1027079,1027610,1027688,1027705,1027908,1028281,1028723,1029523,1029902,1030038,1032118,1032119,1035604,1039469,1040164,1040256,1041090,1042392,1042670,1044095,1044107,1044175,1049186,1049304,1050653,1050665,1055478,1055542,1055825,1056058,1056951,1057496,1062237,1065363,1066242,1066873,1068790,1070737,1070738,1070853,1071905,1071906,1071941,1073310,1073845,1073879,1074247,1076519,1077096,1077230,1078329,1079761,1080301,1081005,1081750,1081751,1082155,1082163,1082318,1083826,1084117,1084157,1085276,1085529,1085661,1087102,1087104,1088573,1089039,1090427,1090765,1090953,1093518,1093917,1094788,1094814,1094883,1095267,1096738,1096937,1097158,1097531,1097624,1098535,1098592,1099308,1099569,1100078,1101246,1101470,1102868,1104789,1106197,1108508,1109882,1109998,1110435,1110869,1110871,1111493,1111622,1111657,1112209,1112357,1113534,1113652,1113742,1113975,1115769,1117951,1118611,1119376,1119416,1119792,1121717,1121852,1122191,1123064,1123185,1123186,1123558,1124885,1125815,1126283,1126318,1127080,1127173,1128146,1128323,1128355,1129071,1129566,1130840,1131291,1132174,1132323,1132455,1132663,1132900,1135009,1136444,1138666,1138715,1138746,1139915,1140255,1141168,1142899,1143033,1143454,1143893,1144506,1149686,1149792,1150003,1150190,1150250,1150895,1153830,1155815,1156677,1156694,1156908,1157104,1157354,1158809,1159235,1159538,1160163,1161557,1161770,1162224,1162367,1162743,1163978,1164310,1165439,1165578,1165730,1165823,1165960,1166139,1166758,1167008,1167501,1167732,1167746,1168480,1168973,1169489,1170175,1170863,1171368,1171561,1172226,1172908,1172928,1173226,1173356,1174009,1174091,1174514,1175729,1176116,1176129,1176134,1176232,1176256,1176257,1176258,1176259,1176262,1176389,1176785,1176977,1177120,1177127,1177559,1178168,1178341,1178670,1179491,1179562,1179630,1179805,1180125,1180781,1181126,1181324,1181944,1182066,1182211,1182244,1182264,1182331,1182333,1182379,1182963,1183059,1183374,1183858,1184505,1185588,1185706,1185748,1186738,1187045,1189521,1190781,1193357,356549,381844,394317,408865,428177,430141,431945,437293,442740,459468,489641,504687,509031,526319,590833,610223,610642,629905,637176,651003,657698,658604,670526,673071,693027,715423,720601,743787,747125,748738,749210,749213,749735,750618,751718,751946,751977,754447,754677,761500,774710,784670,784994,787526,793420,799119,802184,803004,809831,811890,822642,825221,828513,831629,832833,834601,835687,839107,84331,849377,855666,855676,856687,857203,857850,858239,867887,869945,871152,872299,873351,876282,876710,876712,876748,880891,885662,885882,889013,889363,892477,892480,895129,898917,901223,901277,901902,902364,906878,907584,908362,908372,912014,912015,912018,912292,912293,912294,912296,912460,913229,915479,917607,917759,917815,919648,920236,922448,922488,922496,922499,922500,926597,929678,929736,930189,931698,931978,933898,933911,934487,934489,934491,934493,935856,937085,937212,937492,937634,937912,939456,940608,942385,942751,943421,944204,945455,946648,947104,947357,947679,948198,952871,954256,954486,954690,957812,957813,957815,958501,961334,962291,963415,963974,964204,964472,964474,965830,967128,968046,968047,968048,968050,968265,968270,968374,968601,975875,976942,977584,977614,977615,977616,977663,978224,981848,982268,982575,983249,984323,985054,988086,990207,990392,990419,990428,991193,991877,992120,992988,992989,992992,993130,993819,993825,993968,994749,994844,994910,995075,995324,995359,995377,995959,996255,997043,997614,998190,999665,999666,999668 CVE References: CVE-2006-2937,CVE-2006-2940,CVE-2006-3738,CVE-2006-4339,CVE-2006-4343,CVE-2006-7250,CVE-2007-3108,CVE-2007-4995,CVE-2007-5135,CVE-2008-0891,CVE-2008-1672,CVE-2008-5077,CVE-2009-0590,CVE-2009-0591,CVE-2009-0789,CVE-2009-1377,CVE-2009-1378,CVE-2009-1379,CVE-2009-1386,CVE-2009-1387,CVE-2010-0740,CVE-2010-0742,CVE-2010-1633,CVE-2010-2939,CVE-2010-3864,CVE-2010-5298,CVE-2011-0014,CVE-2011-3207,CVE-2011-3210,CVE-2011-3389,CVE-2011-4108,CVE-2011-4576,CVE-2011-4577,CVE-2011-4619,CVE-2011-4944,CVE-2012-0027,CVE-2012-0050,CVE-2012-0845,CVE-2012-0884,CVE-2012-1150,CVE-2012-1165,CVE-2012-2110,CVE-2012-2686,CVE-2012-4929,CVE-2013-0166,CVE-2013-0169,CVE-2013-1752,CVE-2013-4238,CVE-2013-4314,CVE-2013-4353,CVE-2013-6449,CVE-2013-6450,CVE-2014-0012,CVE-2014-0076,CVE-2014-0160,CVE-2014-0195,CVE-2014-0198,CVE-2014-0221,CVE-2014-0224,CVE-2014-1829,CVE-2014-1830,CVE-2014-2667,CVE-2014-3470,CVE-2014-3505,CVE-2014-3506,CVE-2014-3507,CVE-2014-3508,CVE-2014-3509,CVE-2014-3510,CVE-2014-3511,CVE-2014-3512,CVE-2014-3513,CVE-2014-3566,CVE-2014-3567,CVE-2014-3568,CVE-2014-3570,CVE-2014-3571,CVE-2014-3572,CVE-2014-4650,CVE-2014-5139,CVE-2014-7202,CVE-2014-7203,CVE-2014-8275,CVE-2014-9721,CVE-2015-0204,CVE-2015-0205,CVE-2015-0206,CVE-2015-0209,CVE-2015-0286,CVE-2015-0287,CVE-2015-0288,CVE-2015-0289,CVE-2015-0293,CVE-2015-1788,CVE-2015-1789,CVE-2015-1790,CVE-2015-1791,CVE-2015-1792,CVE-2015-2296,CVE-2015-3194,CVE-2015-3195,CVE-2015-3196,CVE-2015-3197,CVE-2015-3216,CVE-2015-4000,CVE-2016-0702,CVE-2016-0705,CVE-2016-0797,CVE-2016-0798,CVE-2016-0799,CVE-2016-0800,CVE-2016-10745,CVE-2016-2105,CVE-2016-2106,CVE-2016-2107,CVE-2016-2109,CVE-2016-2176,CVE-2016-2177,CVE-2016-2178,CVE-2016-2179,CVE-2016-2180,CVE-2016-2181,CVE-2016-2182,CVE-2016-2183,CVE-2016-6302,CVE-2016-6303,CVE-2016-6304,CVE-2016-6306,CVE-2016-7052,CVE-2016-7055,CVE-2016-9015,CVE-2017-18342,CVE-2017-3731,CVE-2017-3732,CVE-2017-3735,CVE-2017-3736,CVE-2017-3737,CVE-2017-3738,CVE-2018-0732,CVE-2018-0734,CVE-2018-0737,CVE-2018-0739,CVE-2018-18074,CVE-2018-20060,CVE-2018-5407,CVE-2018-7750,CVE-2019-10906,CVE-2019-11236,CVE-2019-11324,CVE-2019-13132,CVE-2019-1547,CVE-2019-1551,CVE-2019-1559,CVE-2019-1563,CVE-2019-20907,CVE-2019-20916,CVE-2019-5010,CVE-2019-6250,CVE-2019-8341,CVE-2019-9740,CVE-2019-9947,CVE-2020-14343,CVE-2020-15166,CVE-2020-15523,CVE-2020-15801,CVE-2020-1747,CVE-2020-1971,CVE-2020-25659,CVE-2020-26137,CVE-2020-27783,CVE-2020-28493,CVE-2020-29651,CVE-2020-36242,CVE-2020-8492,CVE-2021-23336,CVE-2021-23840,CVE-2021-23841,CVE-2021-28957,CVE-2021-29921,CVE-2021-3177,CVE-2021-33503,CVE-2021-3426,CVE-2021-3712 JIRA References: ECO-3105,SLE-11435,SLE-12684,SLE-12986,SLE-13688,SLE-14253,SLE-15159,SLE-15860,SLE-15861,SLE-16754,SLE-17532,SLE-17957,SLE-18260,SLE-18354,SLE-18446,SLE-19264,SLE-3887,SLE-4480,SLE-4577,SLE-7686,SLE-9135 Sources used: SUSE Manager Tools 12-BETA (src): venv-salt-minion-3002.2-3.3.2 NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.