var-201203-0383
Vulnerability from variot

The TAR file parser in Command Antivirus 5.2.11.5, Emsisoft Anti-Malware 5.1.0.1, F-Prot Antivirus 4.6.2.117, Fortinet Antivirus 4.2.254.0, Ikarus Virus Utilities T3 Command Line Scanner 1.1.97.0, K7 AntiVirus 9.77.3565, NOD32 Antivirus 5795, Norman Antivirus 6.06.12, PC Tools AntiVirus 7.0.3.5, Rising Antivirus 22.83.00.03, and VirusBuster 13.6.151.0 allows remote attackers to bypass malware detection via a POSIX TAR file with an initial MZ character sequence. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different TAR parser implementations. Multiple products TAR The file parser contains a vulnerability that can bypass malware detection. CVE May be split intoBy a third party, MZ Has a character sequence that starts with POSIX TAR Via files, malware detection can be bypassed. Successful exploits will allow attackers to bypass on-demand virus scanning, possibly allowing malicious files to escape detection. Multiple file-parsing vulnerabilities leading to evasion in different antivirus(AV) products. All affected products are command-line versions of the AVs.

Vulnerability Descriptions

Affected products - ClamAV 0.96.4, CAT-QuickHeal 11.00

CVE no - CVE-2012-1419

  1. 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. Specially crafted infected ELF files with "\4a\46\49\46" at offset 6 evades detection. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. '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

  1. '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

  1. '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

  1. 'class' field in ELF files is parsed incorrectly.
    If an infected ELF file's class field is incremented by 1 it evades detection. Infected RAR files with initial two bytes set to 'MZ' can be fixed by the user and correctly extracted. Such a file evades detection. 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

  1. '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

  1. '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

  1. 'encoding' field in ELF files is parsed incorrectly.
    If an infected ELF file's encoding field is incremented by 1 it evades detection. '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

  1. '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

  1. '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

  1. '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

  1. '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

  1. '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

  1. 'coffFiles' field in CAB files is parsed incorrectly.
    If an infected CAB file's coffFiles field is incremented by 1 it evades detection. 'ei_version' field in ELF files is parsed incorrectly.
    If an infected ELF file's version field is incremented by 1 it evades detection. '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

  1. 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. 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. 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

  1. 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. 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. 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

  1. 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

  1. 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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    "data": "The TAR file parser in Command Antivirus 5.2.11.5, Emsisoft Anti-Malware 5.1.0.1, F-Prot Antivirus 4.6.2.117, Fortinet Antivirus 4.2.254.0, Ikarus Virus Utilities T3 Command Line Scanner 1.1.97.0, K7 AntiVirus 9.77.3565, NOD32 Antivirus 5795, Norman Antivirus 6.06.12, PC Tools AntiVirus 7.0.3.5, Rising Antivirus 22.83.00.03, and VirusBuster 13.6.151.0 allows remote attackers to bypass malware detection via a POSIX TAR file with an initial MZ character sequence. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independently in different TAR parser implementations. Multiple products TAR The file parser contains a vulnerability that can bypass malware detection. CVE May be split intoBy a third party, MZ Has a character sequence that starts with POSIX TAR Via files, malware detection can be bypassed. \nSuccessful exploits will allow attackers to bypass on-demand virus scanning, possibly allowing malicious files to escape detection. Multiple file-parsing vulnerabilities leading to evasion in different antivirus(AV) products. All \naffected products are command-line versions of \nthe AVs. \n\n----------------------------\nVulnerability Descriptions\n----------------------------\n\n1. \n\n   Affected products -\n   ClamAV 0.96.4, CAT-QuickHeal 11.00\n  \n   CVE no - \n   CVE-2012-1419\n\n2. Specially crafted infected ELF files with \"ustar\" at offset 257\n   evades detection. \n\n   Affected products -\n   BitDefender 7.2, Comodo 7424, Emsisoft 5.1.0.1, eSafe 7.0.17.0, \n   F-Secure 9.0.16160.0, Ikarus T3.1.1.97.0, McAfee 5.400.0.1158, \n   McAfee-GW-Edition 2010.1C, nProtect 2011-01-17.01 \n\n   CVE no - \n   CVE-2012-1429\n12. Specially crafted infected ELF files with \"\\19\\04\\00\\10\" at offset 8 evades\n   detection. Specially crafted infected ELF files with \"\\4a\\46\\49\\46\" at offset 6 evades\n   detection. Specially crafted infected MS EXE files with \"\\57\\69\\6E\\5A\\69\\70\" at offset\n   29 evades detection. \n\n   Affected products -\n   Emsisoft 5.1.0.1, eSafe 7.0.17.0, Ikarus T3.1.1.97.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1432\n\n15. Specially crafted infected MS EXE files with \"\\4a\\46\\49\\46\" at offset\n   6 evades detection. \n\n   Affected products -\n   AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0, \n   Ikarus T3.1.1.97.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1433\n\n16. Specially crafted infected MS EXE files with \"\\19\\04\\00\\10\" at offset\n   8 evades detection. \n\n   Affected products -\n   AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0, \n   Panda 10.0.2.7\n   \n   CVE no - \n   CVE-2012-1434\n\n17. Specially crafted infected MS EXE files with \"\\50\\4B\\4C\\49\\54\\45\" at \n   offset 30 evades detection. \n   \n   Affected products - \n   AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0, \n   Ikarus T3.1.1.97.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1435\n\n18. Specially crafted infected MS EXE files with \"\\2D\\6C\\68\" at \n   offset 2 evades detection. \n \n   Affected products - \n   AhnLab-V3 2011.01.18.00, Emsisoft 5.1.0.1, eSafe 7.0.17.0, \n   Ikarus T3.1.1.97.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1436\n\n19. Specially crafted infected MS Office files with \"\\50\\4B\\53\\70\\58\" at \n   offset 526 evades detection. \n   \n   Affected products - \n   Comodo 7425\n   \n   CVE no - \n   CVE-2012-1437\n\n20. Specially crafted infected MS Office files with \"ustar\" at \n   offset 257 evades detection. \n\n   Affected products - \n   Comodo 7425, Sophos 4.61.0 \n\n   CVE no - \n   CVE-2012-1438\n\n21. \u0027padding\u0027 field in ELF files is parsed incorrectly. \n    If an infected ELF file\u0027s padding field is incremented by 1 it evades\n    detection.    \n\n   Affected products - \n   eSafe 7.0.17.0, Rising 22.83.00.03, Fortinet 4.2.254.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1439\n\n22. \u0027identsize\u0027 field in ELF files is parsed incorrectly. \n    If an infected ELF file\u0027s identsize field is incremented by 1 it evades\n    detection.    \n\n   Affected products - \n   Norman 6.06.12, eSafe 7.0.17.0, eTrust-Vet 36.1.8511, Fortinet 4.2.254.0, \n   Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1440\n\n23. \u0027e_ip\u0027 and \u0027e_res\u0027 field in MS EXE files are parsed incorrectly.  \n    If any of these fields in an infected MS EXE file is incremented by 1 \n    it evades detection.    \n\n   Affected products - \n   Prevx 3.0\n\n   \u0027e_minalloc\u0027, \u0027e_res2\u0027,\u0027e_cparhdr\u0027, \u0027e_crlc\u0027, \u0027e_lfarlc\u0027,\u0027e_maxalloc\u0027,\n    \u0027e_oeminfo\u0027, \u0027e_ovno\u0027, \u0027e_cs\u0027, \u0027e_csum\u0027,\u0027e_sp\u0027, \u0027e_ss\u0027, \u0027e_cblp\u0027 and \n    \u0027e_oemid\u0027 fields in MS EXE files are parsed incorrectly.  \n    If any of these fields in an infected MS EXE file is incremented by 1 \n    it evades detection.    \n\n   Affected products - \n   eSafe 7.0.017.0, Prevx 3.0\n\n\n   CVE no - \n   CVE-2012-1441\n\n24. \u0027class\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s class field is incremented by 1 it evades\n    detection. Infected RAR files with initial two bytes set to \u0027MZ\u0027 can be fixed by the \n    user and correctly extracted. Such a file evades detection. Microsoft 1.6402, Sophos 4.61.0, NOD32 5795, AntiVir 7.11.1.163, \n   Norman 6.06.12, McAfee 5.400.0.1158, Panda 10.0.2.7, McAfee-GW-Edition 2010.1C, \n   TrendMicro 9.120.0.1004, Comodo 7424, BitDefender 7.2, eSafe 7.0.17.0, F-Secure 9.0.16160.0\n   nProtect 2011-01-17.01, AhnLab-V3 2011.01.18.00, AVG 10.0.0.1190, Avast 4.8.1351.0, \n   Avast5 5.0.677.0, VBA32 3.12.14.2   \n\n   CVE no - \n   CVE-2012-1443\n\n26. \u0027abiversion\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s abiversion field is incremented by 1 it evades\n    detection. \n\n   Affected products - \n   eSafe 7.0.017.0, Prevx 3.0, Fortinet 4.2.254.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1444\n\n27. \u0027abi\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s abi field is incremented by 1 it evades\n    detection. \n\n   Affected products - \n   eSafe 7.0.017.0, Rising 22.83.00.03, Fortinet 4.2.254.0, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1445\n\n28. \u0027encoding\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s encoding field is incremented by 1 it evades\n    detection. \u0027e_version\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s e_version field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n    Fortinet 4.2.254.0, eSafe 7.0.017.0, DrWeb 5.0.2.03300, Panda 10.0.2.7\n\n   CVE no - \n   CVE-2012-1447\n\n30. \u0027cbCabinet\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s cbCabinet field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   CAT-QuickHeal 11.00, TrendMicro 9.120.0.1004, Ikarus T3.1.1.97.0\n   TrendMicro-HouseCall 9.120.0.1004, Emsisoft 5.1.0.1 \n\n   CVE no - \n   CVE-2012-1448\n\n31. \u0027vMajor\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s vMajor field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   NOD32 5795, Rising 22.83.00.03\n   \n   CVE no - \n   CVE-2012-1449\n\n32. \u0027reserved3\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s reserved field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   Emsisoft 5.1.0.1, Sophos 4.61.0, Ikarus T3.1.1.97.0\n   \n   CVE no - \n   CVE-2012-1450\n\n33. \u0027reserved2\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s reserved2 field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0\n   \n   CVE no - \n   CVE-2012-1451\n\n34. \u0027reserved1\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s reserved field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   Emsisoft 5.1.0.1, Ikarus T3.1.1.97.0, CAT-QuickHeal 11.00\n   \n   CVE no - \n   CVE-2012-1452\n\n35. \u0027coffFiles\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s coffFiles field is incremented by 1 it evades\n    detection. \u0027ei_version\u0027 field in ELF files is parsed incorrectly.  \n    If an infected ELF file\u0027s version field is incremented by 1 it evades\n    detection. \u0027vMinor\u0027 field in CAB files is parsed incorrectly.  \n    If an infected CAB file\u0027s version field is incremented by 1 it evades\n    detection. \n\n   Affected products -\n   NOD32 5795, Rising 22.83.00.03\n \n   CVE no - \n   CVE-2012-1455\n\n38. A specially crafted ZIP file, created by concatenating the contents \n   of a clean TAR archive and a virus-infected ZIP archive, is parsed \n   incorrectly and evades detection. If the length field in the header of a file with test EICAR virus\n   included into a TAR archive is set to be greater than the archive\u0027s total \n   length (1,000,000+original length in our experiments), the antivirus \n   declares the file to be clean but virus gets extracted correctly by the \n   GNU tar program. A Windows Compiled HTML Help (CHM) file is a set of HTML files,\n   scripts, and images compressed using the LZX algorithm. \n   For faster random accesses, the algorithm is reset at intervals\n   instead of compressing the entire file as a single stream. The\n   length of each interval is specified in the LZXC header. \n\n   If an infected CHM file\u0027s header modified so that the reset interval\n   is lower than in the original file, the antivirus declares the file\n   to be clean. But the Windows CHM viewer hh.exe correctly decompresses\n   the infected content located before the tampered header. \n\n   Affected products -\n   ClamAV 0.96.4, Sophos 4.61.0 \n\n   CVE no - \n   CVE-2012-1458\n\n41. In a POSIX TAR archive, each member file has a 512-byte header protected\n   by a simple checksum. Every header also contains a file length field, which\n   is used by the extractor to locate the next header in the archive. \n\n   If a TAR archive contains two files: the first one is clean, while\n   the second is infected with test EICAR virus - and it is modified such that \n   the length field in the header of the first, clean file to point into the \n   middle of the header of the second, infected file. The antivirus declares \n   the file to be clean but virus gets extracted correctly by the \n   GNU tar program. If an infected tar.gz archive is appended 6 random bytes at the end, \n    the antivirus declares the file to be clean but virus gets extracted by\n    the gunzip+tar programs correctly by ignoring these bytes. GZIP files can contain multiple compressed streams, which are assembled\n    when the contents are extracted. If an infected .tar.gz file is broken \n    into two streams, the antivirus declares the infected .tar.gz file to \n    be clean while tar+gunzip extract the virus correctly\n\n   Affected products -\n   AVG 10.0.0.1190, BitDefender 7.2, Command 5.2.11.5, Emsisoft 5.1.0.1, \n   F-Secure 9.0.16160.0, Fortinent 4.2.254.0, Ikarus T3.1.1.97.0, \n   Jiangmin 13.0.900, K7AntiVirus 9.77.3565, Kaspersky 7.0.0.125, \n   McAfee 5.400.0.1158, McAfee-GW-Edition 2010.1C, NOD32 5795, Norman 6.06.12, \n   Rising 22.83.00.03, Sophos 4.61.0, Symantec 20101.3.0.103, \n   TrendMicro 9.120.0.1004, TrendMicro-HouseCall 9.120.0.1004, VBA32 3.12.14.2 \n\n   CVE no - \n   CVE-2012-1461\n\n44. If an infected ZIP archive is prepended with 1024 random bytes at the \n   beginning, the antivirus declares the file to be clean but virus gets extracted\n   by the unzip program correctly by skipping these bytes\n\n   Affected products -\n   AhnLab-V3 2011.01.18.00, AVG 10.0.0.1190, CAT-QuickHeal 11.00, \n   Emsisoft 5.1.0.1, eSafe 7.0.17.0, Fortinent 4.2.254.0, Ikarus T3.1.1.97.0, \n   Jiangmin 13.0.900, Kaspersky 7.0.0.125, Norman 6.06.12, Sophos 4.61.0, \n   Symantec 20101.3.0.103 \n\n   CVE no - \n   CVE-2012-1462\n\n45. In most ELF files, the 5th byte of the header indicates endianness: 01\n   for little-endian, 02 for bigendian. Linux kernel, however, does not\n   check this field before loading an ELF file. 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