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Date: Mon, 19 Mar 2012 04:22:03 GMT
From: sumanj@...il.com
To: bugtraq@...urityfocus.com
Subject: Evasion attacks expoliting file-parsing vulnerabilities in
antivirus products
Multiple file-parsing vulnerabilities leading to evasion in different antivirus(AV) products. All
affected products are command-line versions of
the AVs.
----------------------------
Vulnerability Descriptions
----------------------------
1. Specially crafted infected POSIX TAR files with "[aliases]" as first 9 bytes
evades detection.
Affected products -
ClamAV 0.96.4, CAT-QuickHeal 11.00
CVE no -
CVE-2012-1419
2. Specially crafted infected POSIX TAR files with "\7fELF" as first 4 bytes
evades detection.
Affected products -
CAT-QuickHeal 11.00, Command 5.2.11.5, F-Prot 4.6.2.117,
Fortinent 4.2.254.0, K7AntiVirus 9.77.3565, Kaspersky 7.0.0.125,
Microsoft 1.6402, NOD32 5795, Norman 6.06.12, Panda 10.0.2.7,
Rising 22.83.00.03
CVE no -
CVE-2012-1420
3. Specially crafted infected POSIX TAR files with "MSCF" as first 4 bytes
evades detection.
Affected products -
CAT-QuickHeal 11.00, Norman 6.06.12, Rising 22.83.00.03,
Symantec 20101.3.0.103
CVE no -
CVE-2012-1421
4. Specially crafted infected POSIX TAR files with "ITSF" as first 4 bytes
evades detection.
Affected products -
CAT-QuickHeal 11.00, NOD32 5795, Norman 6.06.12, Rising 22.83.00.03
CVE no -
CVE-2012-1422
5. Specially crafted infected POSIX TAR files with "MZ" as first 2 bytes
evades detection.
Affected products -
Command 5.2.11.5, Emsisoft 5.1.0.1, F-Prot 4.6.2.117, Fortinent 4.2.254.0,
Ikarus T3.1.1.97.0, K7AntiVirus 9.77.3565, NOD32 5795, Norman 6.06.12,
PCTools 7.0.3.5, Rising 22.83.00.03, VirusBuster 13.6.151.0
CVE no -
CVE-2012-1423
6. Specially crafted infected POSIX TAR files with "\19\04\00\10" at offset 8
evades detection.
Affected products -
Antiy-AVL 2.0.3.7, CAT-QuickHeal 11.00, Jiangmin 13.0.900, Norman 6.06.12,
PCTools 7.0.3.5, Sophos 4.61.0
CVE no -
CVE-2012-1424
7. Specially crafted infected POSIX TAR files with "\50\4B\03\04" as the first
4 bytes evades detection.
Affected products -
AntiVir 7.11.1.163, Antiy-AVL 2.0.3.7, CAT-QuickHeal 11.00, Emsisoft 5.1.0.1,
Fortinet 4.2.254.0, Ikarus T3.1.1.97.0, Jiangmin 13.0.900,
Kaspersky 7.0.0.125, McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C,
NOD32 5795, Norman 6.06.12, PCTools 7.0.3.5, Symantec 20101.3.0.103,
TrendMicro 9.120.0.1004, TrendMicro-HouseCall 9.120.0.1004
CVE no -
CVE-2012-1425
8. Specially crafted infected POSIX TAR files with "\42\5A\68" as the first
3 bytes evades detection.
Affected products -
CAT-QuickHeal 11.00, Command 5.2.11.5, F-Prot 4.6.2.117,
K7AntiVirus 9.77.3565, Norman 6.06.12, Rising 22.83.00.03
CVE no -
CVE-2012-1426
9. Specially crafted infected POSIX TAR files with "\57\69\6E\5A\69\70" at
offset 29 evades detection.
Affected products -
CAT-QuickHeal 11.00, Norman 6.06.12, Sophos 4.61.0
CVE no -
CVE-2012-1427
10. Specially crafted infected POSIX TAR files with "\4a\46\49\46" at offset 6
evades detection.
Affected products -
CAT-QuickHeal 11.00, Norman 6.06.12, Sophos 4.61.0
CVE no -
CVE-2012-1428
11. Specially crafted infected ELF files with "ustar" at offset 257
evades detection.
Affected products -
BitDefender 7.2, Comodo 7424, Emsisoft 5.1.0.1, eSafe 7.0.17.0,
F-Secure 9.0.16160.0, Ikarus T3.1.1.97.0, McAfee 5.400.0.1158,
McAfee-GW-Edition 2010.1C, nProtect 2011-01-17.01
CVE no -
CVE-2012-1429
12. Specially crafted infected ELF files with "\19\04\00\10" at offset 8 evades
detection.
Affected products -
BitDefender 7.2, Comodo 7424, eSafe 7.0.17.0, F-Secure 9.0.16160.0,
McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C, nProtect 2011-01-17.01,
Sophos 4.61.0, Rising 22.83.00.03
CVE no -
CVE-2012-1430
13. Specially crafted infected ELF files with "\4a\46\49\46" at offset 6 evades
detection.
Affected products -
BitDefender 7.2, Command 5.2.11.5, Comodo 7424, eSafe 7.0.17.0,
F-Prot 4.6.2.117, F-Secure 9.0.16160.0, McAfee-GW-Edition 2010.1C,
nProtect 2011-01-17.01, Sophos 4.61.0, Rising 22.83.00.03
CVE no -
CVE-2012-1431
14. Specially crafted infected MS EXE files with "\57\69\6E\5A\69\70" at offset
29 evades detection.
Affected products -
Emsisoft 5.1.0.1, eSafe 7.0.17.0, Ikarus T3.1.1.97.0, Panda 10.0.2.7
CVE no -
CVE-2012-1432
15. Specially crafted infected MS EXE files with "\4a\46\49\46" at offset
6 evades detection.
Affected products -
AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0,
Ikarus T3.1.1.97.0, Panda 10.0.2.7
CVE no -
CVE-2012-1433
16. Specially crafted infected MS EXE files with "\19\04\00\10" at offset
8 evades detection.
Affected products -
AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0,
Panda 10.0.2.7
CVE no -
CVE-2012-1434
17. Specially crafted infected MS EXE files with "\50\4B\4C\49\54\45" at
offset 30 evades detection.
Affected products -
AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0,
Ikarus T3.1.1.97.0, Panda 10.0.2.7
CVE no -
CVE-2012-1435
18. Specially crafted infected MS EXE files with "\2D\6C\68" at
offset 2 evades detection.
Affected products -
AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0,
Ikarus T3.1.1.97.0, Panda 10.0.2.7
CVE no -
CVE-2012-1436
19. Specially crafted infected MS Office files with "\50\4B\53\70\58" at
offset 526 evades detection.
Affected products -
Comodo 7425
CVE no -
CVE-2012-1437
20. Specially crafted infected MS Office files with "ustar" at
offset 257 evades detection.
Affected products -
Comodo 7425, Sophos 4.61.0
CVE no -
CVE-2012-1438
21. 'padding' field in ELF files is parsed incorrectly.
If an infected ELF file's padding field is incremented by 1 it evades
detection.
Affected products -
eSafe 7.0.17.0, Rising 22.83.00.03, Fortinet 4.2.254.0, Panda 10.0.2.7
CVE no -
CVE-2012-1439
22. 'identsize' field in ELF files is parsed incorrectly.
If an infected ELF file's identsize field is incremented by 1 it evades
detection.
Affected products -
Norman 6.06.12, eSafe 7.0.17.0, eTrust-Vet 36.1.8511, Fortinet 4.2.254.0,
Panda 10.0.2.7
CVE no -
CVE-2012-1440
23. 'e_ip' and 'e_res' field in MS EXE files are parsed incorrectly.
If any of these fields in an infected MS EXE file is incremented by 1
it evades detection.
Affected products -
Prevx 3.0
'e_minalloc', 'e_res2','e_cparhdr', 'e_crlc', 'e_lfarlc','e_maxalloc',
'e_oeminfo', 'e_ovno', 'e_cs', 'e_csum','e_sp', 'e_ss', 'e_cblp' and
'e_oemid' fields in MS EXE files are parsed incorrectly.
If any of these fields in an infected MS EXE file is incremented by 1
it evades detection.
Affected products -
eSafe 7.0.017.0, Prevx 3.0
CVE no -
CVE-2012-1441
24. 'class' field in ELF files is parsed incorrectly.
If an infected ELF file's class field is incremented by 1 it evades
detection.
Affected products -
CAT-QuickHeal 11.00, McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C,
eSafe 7.0.017.0, Kaspersky 7.0.0.125, F-Secure 9.0.16160.0,
Sophos 4.61.0, Antiy-AVL 2.0.3.7, Rising 22.83.00.03, Fortinet 4.2.254.0,
Panda 10.0.2.7
CVE no -
CVE-2012-1442
25. Infected RAR files with initial two bytes set to 'MZ' can be fixed by the
user and correctly extracted. Such a file evades detection.
Affected products -
ClamAV 0.96.4, Rising 22.83.00.03, CAT-QuickHeal 11.00, GData 21,
Symantec 20101.3.0.103, Command 5.2.11.5, Ikarus T3.1.1.97.0,
Emsisoft 5.1.0.1, PCTools 7.0.3.5, F-Prot 4.6.2.117,
VirusBuster 13.6.151.0, Fortinent 4.2.254.0, Antiy-AVL 2.0.3.7,
K7AntiVirus 9.77.3565, TrendMicro-HouseCall 9.120.0.1004,Kaspersky 7.0.0.125
Jiangmin 13.0.900. Microsoft 1.6402, Sophos 4.61.0, NOD32 5795, AntiVir 7.11.1.163,
Norman 6.06.12, McAfee 5.400.0.1158, Panda 10.0.2.7, McAfee-GW-Edition 2010.1C,
TrendMicro 9.120.0.1004, Comodo 7424, BitDefender 7.2, eSafe 7.0.17.0, F-Secure 9.0.16160.0
nProtect 2011-01-17.01, AhnLab-V3 2011.01.18.00, AVG 10.0.0.1190, Avast 4.8.1351.0,
Avast5 5.0.677.0, VBA32 3.12.14.2
CVE no -
CVE-2012-1443
26. 'abiversion' field in ELF files is parsed incorrectly.
If an infected ELF file's abiversion field is incremented by 1 it evades
detection.
Affected products -
eSafe 7.0.017.0, Prevx 3.0, Fortinet 4.2.254.0, Panda 10.0.2.7
CVE no -
CVE-2012-1444
27. 'abi' field in ELF files is parsed incorrectly.
If an infected ELF file's abi field is incremented by 1 it evades
detection.
Affected products -
eSafe 7.0.017.0, Rising 22.83.00.03, Fortinet 4.2.254.0, Panda 10.0.2.7
CVE no -
CVE-2012-1445
28. 'encoding' field in ELF files is parsed incorrectly.
If an infected ELF file's encoding field is incremented by 1 it evades
detection.
Affected products -
CAT-QuickHeal 11.00, McAfee 5.400.0.1158, Symantec 20101.3.0.103,
Norman 6.06.12, eSafe 7.0.017.0, Kaspersky 7.0.0.125,
McAfee-GW-Edition 2010.1C, Sophos 4.61.0, eTrust-Vet 36.1.8511,
Antiy-AVL 2.0.3.7, PCTools 7.0.3.5, Rising 22.83.00.03, Fortinet 4.2.254.0,
Panda 10.0.2.7
CVE no -
CVE-2012-1446
29. 'e_version' field in ELF files is parsed incorrectly.
If an infected ELF file's e_version field is incremented by 1 it evades
detection.
Affected products -
Fortinet 4.2.254.0, eSafe 7.0.017.0, DrWeb 5.0.2.03300, Panda 10.0.2.7
CVE no -
CVE-2012-1447
30. 'cbCabinet' field in CAB files is parsed incorrectly.
If an infected CAB file's cbCabinet field is incremented by 1 it evades
detection.
Affected products -
CAT-QuickHeal 11.00, TrendMicro 9.120.0.1004, Ikarus T3.1.1.97.0
TrendMicro-HouseCall 9.120.0.1004, Emsisoft 5.1.0.1
CVE no -
CVE-2012-1448
31. 'vMajor' field in CAB files is parsed incorrectly.
If an infected CAB file's vMajor field is incremented by 1 it evades
detection.
Affected products -
NOD32 5795, Rising 22.83.00.03
CVE no -
CVE-2012-1449
32. 'reserved3' field in CAB files is parsed incorrectly.
If an infected CAB file's reserved field is incremented by 1 it evades
detection.
Affected products -
Emsisoft 5.1.0.1, Sophos 4.61.0, Ikarus T3.1.1.97.0
CVE no -
CVE-2012-1450
33. 'reserved2' field in CAB files is parsed incorrectly.
If an infected CAB file's reserved2 field is incremented by 1 it evades
detection.
Affected products -
Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0
CVE no -
CVE-2012-1451
34. 'reserved1' field in CAB files is parsed incorrectly.
If an infected CAB file's reserved field is incremented by 1 it evades
detection.
Affected products -
Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0, CAT-QuickHeal 11.00
CVE no -
CVE-2012-1452
35. 'coffFiles' field in CAB files is parsed incorrectly.
If an infected CAB file's coffFiles field is incremented by 1 it evades
detection.
Affected products -
McAfee 5.0.2.03300, TrendMicro-HouseCall 9.120.0.1004, Kaspersky 7.0.0.125,
Sophos 4.61.0, TrendMicro 9.120.0.1004, McAfee-GW-Edition 2010.1C,
Emsisoft 5.1.0.1, eTrust-Vet 36.1.8511, Antiy-AVL 2.0.3.7, Microsoft 1.6402,
Rising 22.83.00.03, Ikarus T3.1.1.97.0, Fortinet 4.2.254.0, Panda 10.0.2.7
CVE no -
CVE-2012-1453
36. 'ei_version' field in ELF files is parsed incorrectly.
If an infected ELF file's version field is incremented by 1 it evades
detection.
Affected products -
McAfee 5.0.02.03300, eSafe 7.0.17.0, McAfee-GW-Edition 2010.1C,
Rising 22.83.00.03, Fortinet 4.2.254.0, Panda 10.0.2.7
CVE no -
CVE-2012-1454
37. 'vMinor' field in CAB files is parsed incorrectly.
If an infected CAB file's version field is incremented by 1 it evades
detection.
Affected products -
NOD32 5795, Rising 22.83.00.03
CVE no -
CVE-2012-1455
38. A specially crafted ZIP file, created by concatenating the contents
of a clean TAR archive and a virus-infected ZIP archive, is parsed
incorrectly and evades detection.
Affected products -
AVG 10.0.0.1190, CAT-QuickHeal 11.00, Comodo 7424, Emsisoft 5.1.0.1,
eSafe 7.0.17.0, F-Prot 4.6.2.117,Fortinent 4.2.254.0, Ikarus T3.1.1.97.0,
Jiangmin 13.0.900, Kaspersky 7.0.0.125, McAfee 5.400.0.1158,
McAfee-GW-Edition 2010.1C, NOD32 5795, Norman 6.06.12, Panda 10.0.2.7,
Rising 22.83.00.03, Sophos 4.61.0, Symantec 20101.3.0.103,
TrendMicro 9.120.0.1004, TrendMicro-HouseCall 9.120.0.1004
CVE no -
CVE-2012-1456
39. If the length field in the header of a file with test EICAR virus
included into a TAR archive is set to be greater than the archive's total
length (1,000,000+original length in our experiments), the antivirus
declares the file to be clean but virus gets extracted correctly by the
GNU tar program.
Affected products -
AntiVir 7.11.1.163, Antiy-AVL 2.0.3.7, Avast 4.8.1351.0, Avast5 5.0.677.0,
AVG 10.0.0.1190, BitDefender 7.2, CAT-QuickHeal 11.00, ClamAV 0.96.4,
Command 5.2.11.5, Emsisoft 5.1.0.1, eSafe 7.0.17.0, F-Prot 4.6.2.117,
GData 21, Ikarus T3.1.1.97.0, Jiangmin 13.0.900, K7AntiVirus 9.77.3565,
Kaspersky 7.0.0.125, McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C,
Microsoft 1.6402, NOD32 5795, Norman 6.06.12, PCTools 7.0.3.5,
Rising 22.83.00.03, Symantec 20101.3.0.103, TrendMicro 9.120.0.1004,
TrendMicro-HouseCall 9.120.0.1004, VBA32 3.12.14.2, VirusBuster 13.6.151.0
CVE no -
CVE-2012-1457
40. A Windows Compiled HTML Help (CHM) file is a set of HTML files,
scripts, and images compressed using the LZX algorithm.
For faster random accesses, the algorithm is reset at intervals
instead of compressing the entire file as a single stream. The
length of each interval is specified in the LZXC header.
If an infected CHM file's header modified so that the reset interval
is lower than in the original file, the antivirus declares the file
to be clean. But the Windows CHM viewer hh.exe correctly decompresses
the infected content located before the tampered header.
Affected products -
ClamAV 0.96.4, Sophos 4.61.0
CVE no -
CVE-2012-1458
41. In a POSIX TAR archive, each member file has a 512-byte header protected
by a simple checksum. Every header also contains a file length field, which
is used by the extractor to locate the next header in the archive.
If a TAR archive contains two files: the first one is clean, while
the second is infected with test EICAR virus - and it is modified such that
the length field in the header of the first, clean file to point into the
middle of the header of the second, infected file. The antivirus declares
the file to be clean but virus gets extracted correctly by the
GNU tar program.
Affected products -
AhnLab-V3 2011.01.18.00, AntiVir 7.11.1.163, Antiy-AVL 2.0.3.7,
Avast 4.8.1351.0, Avast5 5.0.677.0, AVG 10.0.0.1190, BitDefender 7.2,
CAT-QuickHeal 11.00, ClamAV 0.96.4, Command 5.2.11.5, Comodo 7424,
Emsisoft 5.1.0.1, F-Prot 4.6.2.117, F-Secure 9.0.16160.0,
Fortinent 4.2.254.0, GData 21, Ikarus T3.1.1.97.0, Jiangmin 13.0.900,
K7AntiVirus 9.77.3565, Kaspersky 7.0.0.125, McAfee 5.400.0.1158,
McAfee-GW-Edition 2010.1C, Microsoft 1.6402, NOD32 5795,
Norman 6.06.12, nProtect 2011-01-17.01, Panda 10.0.2.7,
PCTools 7.0.3.5, Rising 22.83.00.03, Sophos 4.61.0,
Symantec 20101.3.0.103, TrendMicro 9.120.0.1004,
TrendMicro-HouseCall 9.120.0.1004, VBA32 3.12.14.2,
VirusBuster 13.6.151.0
CVE no -
CVE-2012-1459
42. If an infected tar.gz archive is appended 6 random bytes at the end,
the antivirus declares the file to be clean but virus gets extracted by
the gunzip+tar programs correctly by ignoring these bytes.
Affected products -
Antiy-AVL 2.0.3.7, CAT-QuickHeal 11.00, Command 5.2.11.5,
eSafe 7.0.17.0, F-Prot 4.6.2.117, Jiangmin 13.0.900,
K7AntiVirus 9.77.3565, VBA32 3.12.14.2
CVE no -
CVE-2012-1460
43. GZIP files can contain multiple compressed streams, which are assembled
when the contents are extracted. If an infected .tar.gz file is broken
into two streams, the antivirus declares the infected .tar.gz file to
be clean while tar+gunzip extract the virus correctly
Affected products -
AVG 10.0.0.1190, BitDefender 7.2, Command 5.2.11.5, Emsisoft 5.1.0.1,
F-Secure 9.0.16160.0, Fortinent 4.2.254.0, Ikarus T3.1.1.97.0,
Jiangmin 13.0.900, K7AntiVirus 9.77.3565, Kaspersky 7.0.0.125,
McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C, NOD32 5795, Norman 6.06.12,
Rising 22.83.00.03, Sophos 4.61.0, Symantec 20101.3.0.103,
TrendMicro 9.120.0.1004, TrendMicro-HouseCall 9.120.0.1004, VBA32 3.12.14.2
CVE no -
CVE-2012-1461
44. If an infected ZIP archive is prepended with 1024 random bytes at the
beginning, the antivirus declares the file to be clean but virus gets extracted
by the unzip program correctly by skipping these bytes
Affected products -
AhnLab-V3 2011.01.18.00, AVG 10.0.0.1190, CAT-QuickHeal 11.00,
Emsisoft 5.1.0.1, eSafe 7.0.17.0, Fortinent 4.2.254.0, Ikarus T3.1.1.97.0,
Jiangmin 13.0.900, Kaspersky 7.0.0.125, Norman 6.06.12, Sophos 4.61.0,
Symantec 20101.3.0.103
CVE no -
CVE-2012-1462
45. In most ELF files, the 5th byte of the header indicates endianness: 01
for little-endian, 02 for bigendian. Linux kernel, however, does not
check this field before loading an ELF file. If an infected ELF file's 5-th
byte is set to 02, the antivirus declares the file to be clean but the ELF
file gets executed correctly.
Affected products -
AhnLab-V3 2011.01.18.00, BitDefender 7.2, CAT-QuickHeal 11.00, Command 5.2.11.5,
Comodo 7424, eSafe 7.0.17.0, F-Prot 4.6.2.117, F-Secure 9.0.16160.0,
McAfee 5.400.0.1158, Norman 6.06.12, nProtect 2011-01-17.01, Panda 10.0.2.7
CVE no -
CVE-2012-1463
--------
Credits
--------
Vulnerabilities found and advisory written by Suman Jana and Vitaly Shmatikov.
-----------
References
-----------
"Abusing File Processing in Malware Detectors for Fun and Profit" by Suman Jana and Vitaly Shmatikov
To appear in IEEE Symposium on Security and Privacy 2012
http://www.ieee-security.org/TC/SP2012/
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