Two vulnerabilities have been identified in Linux Kernel, which could be exploited by attackers to cause a denial of service.
The first issue is caused by an error in the "decode_choice()" [net/netfilter/nf_conntrack_h323_asn1.c] function when handling malformed Choices that are still encoded in the fixed length bit-field, which could be exploited by attackers to cause an access to undefined types, creating a denial of service condition.
The second vulnerability is caused by an error in the signal handling on PowerPC-based systems, which could be exploited by malicious local attackers to crash an affected system, creating a denial of service condition.
Credits
Vulnerabilities reported by Zhongling Wen and the vendor.
ChangeLog
2007-07-09 : Initial release
2007-07-10 : Updated Description
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