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
taptap(点点)
E世博
瑞丰国际
A级信誉公司
吉祥坊
星宝合营
乐动体育
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] => 30011 [posts] => 487473 [todayposts] => 57 [yesterdayposts] => 100 [rank] => 2 [oldrank] => 2 [lastpost] => 2814672 狗狗币ETF连续10天零资金流入,巨鲸们还在逢低买入吗?(转) 1773454733 jackcool1011 [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。
6 y0 {" D- c2 @9 x1 u$ e. Q/ ]  i
1 b2 b2 T. `  h- e
9 l0 x$ [6 m7 o# W' j9 V" e) E& j

) E3 ~/ P3 x# U( m4 E; k2 O
9 \' N7 e+ x# e4 o#1 事件相关信息
! z0 P8 M, Y# m% f- n# T* c/ m! j$ X* L& t
/ k( A; i1 D- P) R. f  ?6 a

: U% F  R/ V" |/ k1 W本次攻击事件包含多笔交易,部分交易信息如下所示:
3 n1 ~. Z# e" A. r" c. J: s) d4 L! j3 X  P
3 n% [1 z1 x, }) C. U# j" A. z
4 e2 V9 f- D) E0 K, R
攻击交易 (部分)# W- A: h8 E) R

9 C5 G" y- B) r4 M& A- u7 D  R0x77cf448ceaf8f66e06d1537ef83218725670d3a509583ea0d161533fda56c063 (BNB Chain)4 N1 h+ J" X/ Z# `( k) h1 q

8 l/ r! w* q) ~- }1 q  e0x1e769a59a5a9dabec0cb7f21a3e346f55ae1972bb18ae5eeacdaa0bc3424abd2 (Ethereum)" |6 F' e  e2 h* ^! J* Z

5 j( ]: h9 Z, ~9 |" E1 u2 ~: V
' Y9 f$ W) ?$ w4 m: e4 g
7 ~" c/ t8 z9 q攻击者地址, @; g! y, o5 `7 A

5 ]# Q8 E6 X  `" z7 @# C: G! H5 G0x73b359d5da488eb2e97990619976f2f004e9ff7c
( M/ I0 ^! L. \% P' ^$ p6 P$ `( u1 N7 s2 x; B9 C1 f
# E9 v$ q& C$ F0 Y* c
3 ~, k# ^- N" }0 E2 m" R+ N
攻击合约
' c/ k/ _  C/ ]  ?! ]% n6 A8 ?
0 {# [! X0 E; D0x9a843bb125a3c03f496cb44653741f2cef82f445
% P! O" z  I0 z* B4 t" m. {. A
8 w) f! q4 N) N% q+ Z2 g- O* h5 Z& A  b5 O! G2 Y
0 |6 `3 U4 w5 d/ J
被攻击合约(部分); ?& j, y3 E, x; X, C3 s
6 n' u* x8 {* o- K; M' ^
0x818e2013dd7d9bf4547aaabf6b617c1262578bc7 (BNB Chain)
- k/ q' w  U$ L1 _; X4 s, B% x0 Q4 t# W0 J+ h7 m
0xf2bda964ec2d2fcb1610c886ed4831bf58f64948 (Ethereum)! q+ {; A$ V) _9 @0 ~. C8 {
0 @  |* N, O( k! \" T& g+ }, B
- l& k: p: `' G

) H! j8 ^5 o& p#2 攻击流程: x7 f: m1 s5 q  o" f2 X3 S
* w- D  ^3 `% T

( {; p" b; l% n6 \: MEthereum和BNB Chain上使用攻击手法相同,以下分析基于BNB Chain上攻击:
2 a0 n/ {7 [0 c1 X3 d" A! @3 w1 h1 ^5 k9 e2 Y
& q/ Y* e3 ~# E  X

7 x8 L" F! [, R1 l) h1. 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。' d* F% k% ^; `4 W- D7 }4 ]

+ k' @; Y" ~& M8 X% \5 N/ f& C, M) K) q/ p! i+ t  B  U0 a

! W3 \2 D0 T$ r2. 攻击者利用攻击合约创建了10个合约,为后续攻击做准备。
/ f. k) L- R( A2 c/ V3 k  {* Y! B% F" I

+ ~# ~! R! o! ^! [3 `; q
  g' l( y% M3 B" y# |( E0 E* z: l  G- I# s2 [5 O" w$ A1 v

" m' y& h  @3 R9 z3. 攻击者接下来将兑换得到的fBNB代币抵押到FEGexPRO合约(0x818e...8bc7)中。
  E/ a6 `7 {& i4 `0 v0 S) h9 r! n& w! u
: F. e! v! \( y
( d2 ^, X" i: {' _& w
4. 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。0 O4 g# ^$ d' |; V
. X( Z0 |* y: C" R% `
/ c+ y! O6 v" }- T

; M" f& L' T+ k, G; {* [; K5 h( b1 e5 h5 w7 O; M9 N( L
& {3 n; U3 H/ W7 }, a, u
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。9 F$ B# Q& E% [, i. O

& `) Z! K; v! G- T& S, v
" J7 |& ^$ P* H- o  E
2 r& r( ^/ O$ ^. }# }' i& k2 b/ D7 `
9 f) l, q" C4 z6 R6 v1 t
6. 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。+ J' d9 z5 x# X2 p

  l+ c' q% k9 J( ]- A5 H8 A) E$ T1 \5 Y: }' }
2 ~& n% e4 r! |) u5 @
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。# j0 N& C' W+ J6 y- v# y' i

1 y' a: c& K) }7 Z3 h. ^1 V' e" P! \5 K

# c( c% k( v4 x- ]' ~" n) Z" p6 b6 c# A% J$ f- v" l
2 I' `! ]- \- V( t! x0 X* I! Y
0 x9 q6 h) T' p( d9 ^. g

; K. w9 d7 x$ M8 R. D8. 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。
6 X/ ^1 ^4 |. b3 L4 E
: t3 j/ H1 ?% z* X! D  l" V
. t  F. s/ b8 \+ }$ o0 |2 f
& _/ s( `2 l" ?9 x; g' ]8 X: G  C( P6 v+ t9 Z
& w% j& s5 x$ t+ Z
9. 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。4 Y  m/ k' X* K& _( f

  X" Q( O$ u, H5 [
8 B+ c. E; [1 E+ y8 @- C: b; A% ^1 R; {# F

: L( F1 s+ \  h0 ]0 ^5 ^: A( z- \7 E+ R! E
9 b$ S; V1 Q, {! T; _+ y
/ Y" N; I- @& [4 q7 i
9 L6 V$ g: z( I% ^- |) ?$ Y

: H" ?. @/ h! v; V7 Z' ^2 P#3 漏洞分析
9 a: w) Z- i9 ~9 Z# O. X: x4 y$ l: N
+ ~3 Q" w# c, ^; A* F1 H2 M: l: ^# p
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。3 A: i5 a/ L- ~/ P, I6 u) P

( S" x4 ]* {7 n2 t3 _: s8 d
8 r# q. J% t5 D& k7 ^3 Y. X! Q  X
+ B) u& d" ^& |" ^& o2 j0 d- u8 ^4 _0 D

! Z4 L8 {/ S* `# y
9 }) Z% J5 x, y2 a. M  ^+ y4 Y) k4 j- m$ [4 R, i) l. |
#4 资金追踪6 {2 }2 E1 @* J3 ]( R
9 r% v( S8 _* Y' t
1 w4 n4 i4 g( f- W5 V
截止发文时,被盗资金仍在攻击者地址(0x73b3...ff7c)中并未转移。
5 _4 t: `7 H% N2 ~. p6 ^
( p7 `% N( D: l  @, f- W1 q$ h7 B& k  h( v5 j' `! D
# E9 K* J0 m* E

% _0 u( d* Z9 H6 {2 V9 ?1 Y( ]. w, s/ H' e( E* S$ c9 ~2 [5 B

! V! s' a+ a+ E2 W' j8 a, E; ?# I0 T8 X  c0 Z8 Z3 B
& ?( k$ P% B6 d, n4 P& E
0 u- X% q- o- V. |
* O! v8 N' H& j4 r, g
! j, K0 D$ R# P6 q, C! v4 d
#5 总结
! ~& W; C. G/ s; D; `2 K; D
3 F8 u: T: ], \# g9 r$ G6 @$ t, y% z- `* K( c& `9 {7 A
针对本次事件,成都链安技术团队建议:
( J2 k) V0 F! O! {7 z) }" l- Q  z- ~7 n: j! F: O2 D

* Z7 w; {/ O+ u5 l1 J3 L; w1 ^, k5 v9 S  ?
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。
( {  X2 L8 |4 `" w/ l. f% E! s
, p/ D# b& A' v1 z9 Q. 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   © 2007-2026 天策论坛 | 小黑屋 | 手机|
1717 : 0