asn1: additional sanity checking during BER decoding (CVE-2008-1673)
upstream commit: ddb2c43594f22843e9f3153da151deaba1a834c5
- Don't trust a length which is greater than the working buffer.
An invalid length could cause overflow when calculating buffer size
for decoding oid.
- An oid length of zero is invalid and allows for an off-by-one error when
decoding oid because the first subid actually encodes first 2 subids.
- A primitive encoding may not have an indefinite length.
Thanks to Wei Wang from McAfee for report.
hardened-kernel unaffected at present time. Removing alias.
PS: Anything using >=genpatches-2.6.25-6 is unaffected