REDHAT-BUG-1889486
First published: Mon Oct 19 2020(Updated: )
AuthenticodeVerify() calls OpenSSLs d2i_PKCS7() API to parse asn encoded signed authenticode pkcs#7 data. when this successfully returns, a type check is done by calling PKCS7_type_is_signed() and then Pkcs7->d.sign->contents->type is used. It is possible to construct an asn1 blob that successfully decodes and have d2i_PKCS7() return a valid pointer and have PKCS7_type_is_signed() also return success but have Pkcs7->d.sign be a NULL pointer. Reference: <a href="https://bugzilla.tianocore.org/show_bug.cgi?id=1914">https://bugzilla.tianocore.org/show_bug.cgi?id=1914</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSL |
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Reference Links
- https://bugzilla.tianocore.org/show_bug.cgi?id=1914
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1889878
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1889877
- https://access.redhat.com/security/cve/CVE-2019-14584
- https://github.com/tianocore/edk2/commit/26442d11e620a9e81c019a24a4ff38441c64ba10
- https://bugzilla.redhat.com/show_bug.cgi?id=1889486
Frequently Asked Questions
What is the severity of REDHAT-BUG-1889486?
The severity of REDHAT-BUG-1889486 is high due to potential remote code execution vulnerabilities.
How do I fix REDHAT-BUG-1889486?
To fix REDHAT-BUG-1889486, update OpenSSL to the latest patched version provided by your distribution.
What software is affected by REDHAT-BUG-1889486?
REDHAT-BUG-1889486 affects OpenSSL implementations utilizing the AuthenticodeVerify() functionality.
What is the impact of REDHAT-BUG-1889486?
The impact of REDHAT-BUG-1889486 could allow an attacker to exploit the vulnerability to execute arbitrary code.
Is there a workaround for REDHAT-BUG-1889486?
A potential workaround for REDHAT-BUG-1889486 is to disable the use of PKCS#7 signed data until an update can be applied.
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