A vulnerability, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a user's system, has been reported in NSS (Network Security Services) security suite and Mozilla browsers shipping vulnerable versions of it.
The vulnerability is caused due to a handling error in the S/MIME (Secure/Multipurpose Internet Mail Extensions) implementation when parsing certain ASN.1 constructs. This can be exploited by sending a specially crafted S/MIME email containing an exceptional ASN.1 element to a user.
The vulnerability reportedly affects NSS 3.8 and prior as well as Mozilla browsers shipping affected versions.
Solution: The vulnerability has been fixed in NSS 3.9 and Mozilla browsers shipping this version.
Provided and/or discovered by: NISCC
Original Advisory: NISCC:
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Subject: Mozilla / NSS S/MIME Implementation Vulnerability
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