优惠论坛
Well123
注册
找回密码 |
天策评选的优秀公司,所有会员与公司发生的问题我们将负责尽力协助处理。
收起/展开
新晋公司
 

新晋公司具有驻站代表,并不在论坛纠纷服务范围内,请会员自行判断选择

  • 356
S级信誉公司
ManBetX万博
YZ
乐投
188金宝博
E世博
瑞丰国际
A级信誉公司
吉祥坊
星宝合营
乐动体育
Vwin
B级信誉公司
bet365
C级合作公司
CMP
金星
LOKI
平博
  • 推荐主题
  • 热门活动
  • 币圈快讯
  • 商城动态
重要通知
 
论坛搜索
              搜索
Array ( [fid] => 6974 [description] => 专注于币圈最新最快资讯,数字货币应用及知识普及 [password] => [icon] => b1/common_6974_icon.png [redirect] => [attachextensions] => [creditspolicy] => Array ( [post] => Array ( [usecustom] => 1 [cycletype] => 1 [cycletime] => 0 [rewardnum] => 5 [extcredits1] => 1 [extcredits2] => 1 [extcredits3] => 0 [extcredits4] => 0 [extcredits5] => 0 [extcredits6] => 0 [extcredits7] => 0 [extcredits8] => 0 [rid] => 1 [fid] => 6974 [rulename] => 发表主题 [action] => post [fids] => 32,52,67,447,1120,1151,1156,6750,6762,6763,6766,6769,6772,6773,6787,6796,6808,6809,6810,6813,6814,6820,6829,6830,6846,6856,6864,6865,6827,6930,6931,6776,6858,6880,6764,6932,6871,6758,6905,1116,6788,6812,6798,6736,6759,6842,6966,6767,6828,6924,6935,6936,6938,6940,6941,6826,6909,6803,6919,6911,6908,6881,6920,6912,6913,6921,6925,6922,6789,6818,6819,6872,6928,6969,6889,6888,6917,6939,6947,6961,6937,6943,6970,6869,6900,6902,6783,6817,1111,6870,6821,6876,6952,6954,6960,6942,6910,6949,6962,6963,6964,6927,6926,6973,6728,6929,6874,6894,6896,6885,6857,6868,1113,6778,56,6844,6878,6802,6933,6811,6923,6877,6875,6918,6892,6757,6832,6833,6795,6793,6848,6837,6849,6850,6851,6852,6853,6854,6863,6882,6836,6790,6838,6794,6791,6873,555,6934,6958,6944,6945,6907,6779,6886,6950,6904,6956,6862,6957,6855,6955,6959,6914,6965,6971,6972,6953,6976,6824,6815,6891,6866,6979,6977,6765,6903,6948,6980,6981,6983,6799,6982,6951,6984,6975,6895,6845,6879,1121,6974 ) [reply] => Array ( [usecustom] => 1 [cycletype] => 1 [cycletime] => 0 [rewardnum] => 0 [extcredits1] => 0 [extcredits2] => 1 [extcredits3] => 10 [extcredits4] => 0 [extcredits5] => 0 [extcredits6] => 0 [extcredits7] => 0 [extcredits8] => 0 [rid] => 2 [fid] => 6974 [rulename] => 发表回复 [action] => reply [fids] => 32,52,67,447,1120,1151,1156,6750,6763,6766,6769,6772,6773,6787,6796,6808,6809,6810,6813,6814,6820,6829,6830,6846,6856,6864,6865,6827,6930,6931,6776,6858,6880,6764,6932,6871,6758,1116,6788,6812,6798,6736,6759,6842,6966,6767,6828,6924,6935,6936,6938,6940,6941,6826,6909,6803,6919,6911,6908,6881,6920,6912,6913,6921,6925,6922,6789,6818,6819,6872,6928,6969,6889,6888,6917,6939,6947,6961,6937,6943,6970,6869,6900,6902,6783,6817,1111,6870,6821,6876,6952,6954,6960,6942,6910,6949,6962,6963,6964,6927,6926,6973,6728,6929,6874,6894,6896,6885,6857,6868,1113,6778,56,6844,6878,6802,6933,6811,6923,6877,6875,6918,6892,6757,6832,6833,6795,6793,6848,6837,6849,6850,6851,6852,6853,6854,6863,6836,6790,6838,6794,6791,6873,555,6934,6958,6944,6945,6907,6779,6886,6950,6904,6956,6862,6957,6855,6955,6959,6914,6965,6971,6972,6953,6976,6824,6815,6891,6866,6979,6977,6765,6903,6948,6980,6981,6983,6799,6982,6951,6984,6975,6895,6845,6879,1121,6974 ) ) [formulaperm] => a:5:{i:0;s:0:"";i:1;s:0:"";s:7:"message";s:0:"";s:5:"medal";N;s:5:"users";s:0:"";} [moderators] => 实习版主1 [rules] => [threadtypes] => Array ( [required] => 1 [listable] => 1 [prefix] => 1 [types] => Array ( [1590] => 论坛公告 [1752] => 公司优惠 [1603] => 虚拟币交流 [1753] => 数字钱包 [1754] => 虚拟币存提 [1755] => 交易所 [1655] => 虚拟币资讯 [1756] => 银行卡 [1757] => 第三方支付 [1760] => 币圈大佬 [1758] => 科技前沿 [1759] => 天策嗨聊 [1661] => 入驻合作 ) [icons] => Array ( [1590] => [1752] => [1603] => [1753] => [1754] => [1755] => [1655] => [1756] => [1757] => [1760] => [1758] => [1759] => [1661] => ) [moderators] => Array ( [1590] => 1 [1752] => [1603] => [1753] => [1754] => [1755] => [1655] => [1756] => [1757] => [1760] => [1758] => [1759] => 1 [1661] => ) ) [threadsorts] => Array ( ) [viewperm] => 9 26 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 31 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 7 8 [postperm] => 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 [replyperm] => 26 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 [getattachperm] => 26 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 [postattachperm] => 26 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 [postimageperm] => 26 22 11 12 13 14 15 27 43 44 60 61 62 63 64 19 67 68 69 73 75 76 83 84 87 90 91 92 33 38 57 58 65 66 74 77 79 80 85 86 1 2 3 [spviewperm] => [seotitle] => [keywords] => [seodescription] => [supe_pushsetting] => [modrecommend] => Array ( [open] => 0 [num] => 10 [imagenum] => 0 [imagewidth] => 300 [imageheight] => 250 [maxlength] => 0 [cachelife] => 0 [dateline] => 0 ) [threadplugin] => Array ( ) [replybg] => [extra] => a:2:{s:9:"namecolor";s:0:"";s:9:"iconwidth";s:2:"60";} [jointype] => 0 [gviewperm] => 0 [membernum] => 0 [dateline] => 0 [lastupdate] => 0 [activity] => 0 [founderuid] => 0 [foundername] => [banner] => [groupnum] => 0 [commentitem] => [relatedgroup] => [picstyle] => 0 [widthauto] => 0 [noantitheft] => 0 [noforumhidewater] => 0 [noforumrecommend] => 0 [livetid] => 0 [price] => 0 [fup] => 6729 [type] => forum [name] => 虚拟币讨论大厅 [status] => 1 [displayorder] => 3 [styleid] => 0 [threads] => 26623 [posts] => 417428 [todayposts] => 220 [yesterdayposts] => 181 [rank] => 2 [oldrank] => 2 [lastpost] => 2751899 收益1658 1753424289 22301 [domain] => [allowsmilies] => 1 [allowhtml] => 1 [allowbbcode] => 1 [allowimgcode] => 1 [allowmediacode] => 0 [allowanonymous] => 0 [allowpostspecial] => 21 [allowspecialonly] => 0 [allowappend] => 0 [alloweditrules] => 1 [allowfeed] => 0 [allowside] => 0 [recyclebin] => 1 [modnewposts] => 2 [jammer] => 1 [disablewatermark] => 0 [inheritedmod] => 0 [autoclose] => 0 [forumcolumns] => 3 [catforumcolumns] => 0 [threadcaches] => 0 [alloweditpost] => 1 [simple] => 16 [modworks] => 1 [allowglobalstick] => 1 [level] => 0 [commoncredits] => 0 [archive] => 0 [recommend] => 0 [favtimes] => 0 [sharetimes] => 0 [disablethumb] => 0 [disablecollect] => 0 [ismoderator] => 0 [threadtableid] => 0 [allowreply] => [allowpost] => [allowpostattach] => )
打印 上一主题 下一主题
卷土重来?黑客获利约130万美元,FEGexPRO合约被攻击事件分析
[复制链接]
avatar
跳转到指定楼层
1#
2022年5月16日,成都链安链必应-区块链安全态势感知平台舆情监测显示,Ethereum和BNB Chain上FEGtoken项目的FEGexPRO合约遭受黑客攻击,黑客获利约3280 BNB 以及144 ETH,价值约130万美元。成都链安技术团队对事件进行了分析,结果如下。* x( s9 L! P) V6 X* ?8 n) o/ i

+ \2 }6 D7 i- l, x6 _% [% U& j% w2 y( K7 o. i, O* [! O

* S; f0 @! W) M' z6 m$ v+ }7 H
- W* e" t$ t+ X$ t" W1 P6 C+ K  B* a  Z6 E$ m
#1 事件相关信息# t* ]2 T% B  g
& ]& m/ V. |  f5 K# E

# i; i! o- B, W3 A0 D4 F7 |7 Z9 |6 L
本次攻击事件包含多笔交易,部分交易信息如下所示:
) a8 p: O, G5 l. i9 a
" ?& B$ ^2 b6 N6 S# r. M0 u, }- W$ x3 |  G; L6 w/ U7 _# J

( O& b2 d7 a7 H* [2 Q  j攻击交易 (部分)
" z! L9 g! l. j$ Z9 ?) r3 z; a+ Q$ B2 G9 }
0x77cf448ceaf8f66e06d1537ef83218725670d3a509583ea0d161533fda56c063 (BNB Chain). h4 F) g: o  @3 q
1 q# }# J3 e( l9 R( o
0x1e769a59a5a9dabec0cb7f21a3e346f55ae1972bb18ae5eeacdaa0bc3424abd2 (Ethereum)% q9 R  n8 v& Q# x2 h& ~* s, [

' \# y" A7 n% S- r/ }- b: M# J/ A5 O9 k$ M' k) @- C3 l9 V9 }# H# x& R

2 g# J% a# w' a! [1 J$ T攻击者地址
6 O3 |" \) Y+ M2 R" Q' s, S4 g- P, O$ e
0x73b359d5da488eb2e97990619976f2f004e9ff7c* {. j, u- n  [  m( ~: Q
+ D! M' G& s2 Q% |
6 M6 _3 p0 _1 I% |
) j; A! ?% y! P0 K6 Z
攻击合约9 ^6 j! m1 N1 Z3 i, s8 K
9 v& G3 X: U  |( K& Q
0x9a843bb125a3c03f496cb44653741f2cef82f445
2 E; n/ C& D* L4 A( D9 q( H( |2 z6 m' B

! u# \" S: V, ?9 ~; u5 d9 N* F
- e: ~/ @# L7 Y7 A2 i' c被攻击合约(部分)) m& v& c, |4 W$ I; n' n

: j/ v2 H& T$ P- i; k( m. U0x818e2013dd7d9bf4547aaabf6b617c1262578bc7 (BNB Chain)
1 l7 u8 Y8 a% F) G
4 c# c' _( ?- p. k6 s0 e0xf2bda964ec2d2fcb1610c886ed4831bf58f64948 (Ethereum)
; S2 h9 y5 [; P! ?3 a$ y2 {& X& ]0 [8 m# W5 w: ]7 h& N. q
5 J7 V: w: q5 O+ n0 \8 Y
: c' u0 d- P: A3 L# t
#2 攻击流程- x* P0 f8 X) S1 ?1 s; }/ V
; K: O  V7 l* t7 E% |* J) V
# h" p' z6 C0 J0 ]4 ^' _* ~7 Q
Ethereum和BNB Chain上使用攻击手法相同,以下分析基于BNB Chain上攻击:, a$ i! E& w& ]) [8 `# H
8 k! h1 E/ X# P. l1 X1 q7 B
# u: S* ?  K/ O% k* x- u
' \- ~" i. Q7 R! \& H
1. 攻击者调用攻击合约(0x9a84...f445)利用闪电贷从DVM合约(0xd534...0dd7)中借贷915.84 WBNB,然后将116.81 WBNB兑换成115.65 fBNB为后续攻击做准备。
0 r' w: g3 x8 |% [  m7 r  {+ T* `! J7 n/ o% N* D  {% ~
- B* h. u: i) W, Q# b8 f) G3 Q
+ j% A, L6 T- S6 [+ s: @& |9 q8 A
2. 攻击者利用攻击合约创建了10个合约,为后续攻击做准备。
# e; o9 D/ f  d6 Y
3 S: ?3 S0 ?& |/ f9 K1 r3 D3 A6 \  w5 i2 `( D
0 G( @0 p: V4 y1 l5 {# z8 z
+ D+ S# n5 U6 D

$ I+ r1 ?! a( t" W, X' u6 B3 Y3. 攻击者接下来将兑换得到的fBNB代币抵押到FEGexPRO合约(0x818e...8bc7)中。0 L- [- d6 N" \2 b$ d
5 D& `$ _3 H, }" e- h; n

" \# @) J0 _" }1 s1 @3 ]" @
- P9 X  {4 a4 D& h4. 然后攻击者重复调用depositInternal和swapToSwap函数,让FEGexPRO合约授权fBNB给之前创建好的其他攻击合约。! S! e8 }0 ?, A
% v/ C! R- E, X+ i! w" A% t, f. n

1 y4 w( ^( w9 r- z3 w' A& p0 V* Y
8 o& v/ H0 ^; X% @
& T2 d+ l+ c5 z% ?0 X, e6 j: _. k) P& R$ y, g
5. 然后利用其他攻击合约调用transferFrom函数将FEGexPRO合约中fBNB全部转移到攻击合约(0x9a84...f445)中。
$ C. J, V9 o# s1 x% v, m* G, S; p2 c, {
- E6 i% V4 z1 m1 ?* S
7 B2 t& S) W) n+ N) j1 z
& }" S! n7 H! i2 ]

' O6 s, _9 ^# f' c6. 接下来又在LP交易对合约(0x2aa7...6c14)中借贷31,217,683,882,286.007211154 FEG代币和423 WBNB。
# |" T0 p- q7 q
4 P9 v6 Y; K' L5 {/ H
# F# D  u6 p7 x3 }' k* B6 |) l5 x( E3 K* h  j
7. 然后重复3、4、5步骤的攻击手法,将FEGexPRO合约中大量FEG代币盗取到攻击合约中。9 E$ i7 m  T1 [% k: Z# {

" r! @  X- l2 K5 x! i  {0 U; `1 Q9 l) x* S

, A, R# x/ ^, l) c& \% Y) i2 \1 _( g$ C8 A, q6 ]2 h  a0 F1 Y8 [

7 B0 o3 d" ^3 n: S8 E  x# H0 j  x) d6 U; s6 ~! ]. B
5 I' X, e0 T% t) F/ P6 {
8. 然后归还闪电贷,将获得的WBNB转入攻击合约中完成此笔攻击。
; R0 `6 Z; q5 A1 U0 u  w
: o/ u& N" N: k/ }% d
6 z, n2 E" k8 ^/ f3 J0 [, C% G) h3 X4 F' b- Q

0 j  x, g% A; ?% A
) k8 W  H) Z1 G% q  W9. 此后,又利用相同的原理,执行了50余笔相同的攻击,最获利约144 ETH和3280 BNB。8 @- H6 ^, [' i, Z( ~
  f) @, n$ \+ G

8 c4 n7 ~4 Q6 ^* `! M6 ^. R6 \2 g+ j& k/ [9 v
7 Z; m0 J/ Y3 ~8 t* l

( w  b$ n3 C5 n5 e/ {3 H+ X, v' w$ p" m; f. G
: E5 a9 c7 y/ B5 g/ b
" O1 L! \5 x& ~& i
' E  ^1 `3 k  K% ^
#3 漏洞分析4 V/ q8 b. r( U, ^& R

4 O: d  ^; D  |" R7 d9 @2 t- x& i/ n
- Y; F0 T' Z+ e2 S本次攻击主要利用了FEGexPRO合约中swapToSwap函数中path地址可控且合约中未对path地址进行有效性校验的漏洞。由于合约中depositInternal函数中更新用户余额时依赖于合约中当前代币余额,攻击者通过传入一个恶意的path地址,调用swapToSwap函数时合约中代币余额并未发生变化,导致攻击者可以反复重置攻击合约在FEGexPRO合约中记录的代币数量,从而让FEGexPRO合约将自身代币反复授权给攻击者所控制的多个恶意合约。
, K5 D( Y" l0 m; U; V% W$ D' |/ s+ K
; B$ X3 V6 W- w6 v; q% F2 h% E

; |* {0 v  }' x
; @* {# x8 u# K) _3 |% u
3 F6 i  C$ {* Y5 x
: k$ }! Q- K2 I7 }  B' d8 q7 `& U/ H2 h5 p
#4 资金追踪
4 p+ y' Y- \; J8 t. q  Q' ^2 Y( U& v/ S( Q, t
4 g* c7 S! y- M
截止发文时,被盗资金仍在攻击者地址(0x73b3...ff7c)中并未转移。
. B) |- m2 C$ c. c/ J
/ ]3 E- I9 J+ I. d! w; l
& J! ~7 k+ w$ r* k1 h' w/ Q6 z7 f6 I' w. w9 h4 ?2 N

' o* z- \; C* M0 R+ @9 I, c) y# H& R  _2 g/ Y) P6 P

3 M" |. I1 p  r# U. A9 o: [7 D3 j3 F3 n4 M4 S* t/ x; ?. |

5 g) ?4 A- ?4 t+ C
; S: h. F7 m& r- V0 J  P" q7 _6 L8 I; i- ~5 P1 y- K
8 P% j) q6 G& p
#5 总结7 O) d2 E/ z6 G, |
2 n5 U5 r* _  I, N# _: S" D
) B& l( c2 Y( F' c+ H$ w8 @2 b
针对本次事件,成都链安技术团队建议:
6 a' a. E; s9 n, b& \; r# h8 N* `) S% S+ [& y

! E  Z* a$ q! r* X3 q* }* l  u: e8 l. K0 }# T5 O+ V
项目开发时,应该注意与其他合约交互时可能存在的安全风险,尽量避免将关键参数设置为用户可控。如果业务需求如此,则需要严格判断用户输入的参数是否存在风险。此外建议项目上线前选择专业的安全审计公司进行全面的安全审计,规避安全风险。
" F/ p0 x$ O* r; F) q
: r' m" x  a# l
avatar
2#
黑客也是厉害啊,又是赚到很多。
avatar
开始发新闻了,也是一堆吧
avatar
如果是行业内的人可以分析一下
avatar
5#
主题回复处广告图案-天策传媒
那你还赶紧的去出手赢个几百万的
avatar
6#
这类新闻适当看一看就可以了
avatar
7#
以后还是立志去干黑客比较赚钱
avatar
8#
黑客很厉害啊,又是赚到了不少的钱的咯
avatar
有门技术肯定是比较好赚钱的事
avatar
这也是要有技术的才能做到了
avatar
还是需要有技术才能够赚钱呢。
avatar
12#
这些黑客果然也是很厉害了
avatar
13#
黑客真的是牛逼哄哄了的哦。
avatar
14#
黑客的火力的那么多啊
avatar
15#
黑客,真厉害,无所不在啊,这是
avatar
16#
看来它还是挺引人注目的公司
您需要登录后才可以回帖 登录 | 论坛注册

本版积分规则

:) :( :D :'( :@ :o
:P :$ ;P :L :Q :lol
:loveliness: :funk: :curse: :dizzy: :shutup: :sleepy:
:hug: :victory: :time: :kiss: :handshake: :call:
{:8_286:} {:8_287:} {:8_288:} {:8_289:}
{:8_290:} {:8_291:} {:8_292:} {:8_293:}
{:8_294:} {:8_295:} {:8_296:} {:8_297:}
{:8_298:} {:8_299:} {:8_300:} {:8_301:}
{:8_302:} {:8_303:} {:8_304:} {:8_305:}
{:8_306:} {:8_307:} {:8_308:} {:8_309:}
{:8_310:} {:8_311:} {:8_312:}
{:8_313:} {:8_314:} {:8_315:} {:8_316:}
{:8_317:} {:8_318:} {:8_319:} {:8_320:}
:) :( :D :'( :@ :o
:P :$ ;P :L :Q :lol
:loveliness: :funk: :curse: :dizzy: :shutup: :sleepy:
:hug: :victory: :time: :kiss: :handshake: :call:
:) :( :D :'( :@ :o
:P :$ ;P :L :Q :lol
:loveliness: :funk: :curse: :dizzy: :shutup: :sleepy:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory:
:) :( :D :'( :@ :o
:P :$ ;P :L :Q :lol
:loveliness: :funk: :curse: :dizzy: :shutup: :sleepy:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory: :time: :kiss: :handshake: :call:
:hug: :victory: :time: :kiss: :handshake:
未有绑定记录
 


Powered by 天策论坛   © 2007-2025 天策论坛 | 小黑屋 | 手机|
1717 : 0