exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

F-Secure F-SecureOnlineScanner.exe DLL Hijacking

F-Secure F-SecureOnlineScanner.exe DLL Hijacking
Posted Dec 23, 2015
Authored by Stefan Kanthak

F-Secure's F-SecureOnlineScanner.exe suffers from a DLL hijacking vulnerability.

tags | advisory
systems | windows
SHA-256 | 08c100af279ae10d50cc0185837958fbe38a62b8c7acd43735db62efeb0c9ab5

F-Secure F-SecureOnlineScanner.exe DLL Hijacking

Change Mirror Download
Hi @ll,

F-Secure's online virus scanner F-SecureOnlineScanner.exe, available
via <https://www.f-secure.com/en/web/home_global/online-scanner>,
loads and executes several rogue/bogus DLLs (UXTheme.dll, HNetCfg.dll,
RASAdHlp.dll, SetupAPI.dll, ClbCatQ.dll, XPSP2Res.dll, CryptNet.dll,
OLEAcc.dll etc.) eventually found in the directory it is started from
(the "application directory").

For software downloaded with a web browser the application directory
is typically the user's "Downloads" directory: see
<https://insights.sei.cmu.edu/cert/2008/09/carpet-bombing-and-directory-poisoning.html>,
<http://blog.acrossecurity.com/2012/02/downloads-folder-binary-planting.html>
and <http://seclists.org/fulldisclosure/2012/Aug/134>

Due to the application manifest embedded in the executable which
specifies "requireAdministrator" the installer is started with
administrative privileges ("protected" administrators are prompted
for consent, unprivileged standard users are prompted for an
administrator password); execution of any hijacked DLL results in
an escalation of privilege!


See <http://seclists.org/fulldisclosure/2015/Nov/101> and
<http://seclists.org/fulldisclosure/2015/Dec/86> plus
<http://home.arcor.de/skanthak/sentinel.html> and the still unfinished
<http://home.arcor.de/skanthak/!execute.html> for more details and why
executable installers (and self-extractors too) are bad.


F-Secure published a security advisory
<https://www.f-secure.com/en/web/labs_global/fsc-2015-4>
and made an updated version of their online scanner available on
<https://www.f-secure.com/en/web/home_global/online-scanner>

CAVEAT: F-Secure's fix works only on Windows Vista and newer versions;
the vulnerability is still present on earlier versions of
Windows!


stay tuned
Stefan Kanthak
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close