A vulnerability was found in Freeware Advanced Audio Decoder 2.8.8 (Audio Processing Software) and classified as problematic. This issue affects the function ifilter_bank of the file libfaad/filtbank.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

A NULL pointer dereference was discovered in ifilter_bank of libfaad/filtbank.c in Freeware Advanced Audio Decoder 2 (FAAD2) 2.8.8. The vulnerability causes a segmentation fault and application crash because adding to windowed output is mishandled in the EIGHT_SHORT_SEQUENCE case.

The bug was discovered 12/17/2018. The weakness was shared 12/22/2018 (Website). The advisory is shared at github.com. The identification of this vulnerability is CVE-2018-20362 since 12/22/2018. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 5 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176933 (Debian Security Update for faad2 (DLA 1791-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries 128092, 128095 and 128096 are related to this item.

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• Audio Processing Software

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• Freeware Advanced Audio Decoder

License

• free

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