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TITLE:
Python audioop Module Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA40148

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http://secunia.com/advisories/40148/
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https://ca.secunia.com/?page=viewadvisory&vuln_id=40148

RELEASE DATE:
2010-06-19

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http://secunia.com/advisories/40148/#comments

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DESCRIPTION:
Some vulnerabilities have been reported in Python, which can be
exploited by malicious people to cause a DoS (Denial of Service).

The vulnerabilities are caused due to errors within the
"audioop_getsample()", "audioop_max()", "audioop_minmax()",
"audioop_avg()", "audioop_rms()", "audioop_avgpp()",
"audioop_maxpp()", "audioop_cross()", "audioop_mul()",
"audioop_tomono()", "audioop_add()", "audioop_bias()",
"audioop_reverse()", "audioop_lin2ulaw()", "audioop_lin2alaw()",
"audioop_lin2adpcm()", "audioop_tostereo()", "audioop_lin2lin()",
"audioop_ratecv()", "audioop_ulaw2lin()", "audioop_alaw2lin()", and
"audioop_adpcm2lin()" functions within audioop.c of the audioop
module not properly verifying if the string length is a multiple of
the "size" parameter, which can be exploited to e.g. cause a crash.

SOLUTION:
Do not process untrusted data using the audioop module.

PROVIDED AND/OR DISCOVERED BY:
Victor Stinner

ORIGINAL ADVISORY:
Python Issue #7673:
http://bugs.python.org/issue7673

Red Hat Bug #598197:
https://bugzilla.redhat.com/show_bug.cgi?id=598197

OTHER REFERENCES:
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