Vulnerability Details

OpenSSL: ASN1 BIO Vulnerability (20120419) (Windows)

Published: 2021-08-16 10:54:11
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:P/I:P/A:P

Detection Type:
Remote Banner

Solution Type:
Vendor Patch

Summary:
OpenSSL is prone to an exploitable vulnerability in the function asn1_d2i_read_bio.

Detection Method:
Checks if a vulnerable version is present on the target host.

Technical Details:
Any application which uses BIO or FILE based functions to read untrusted DER format data is vulnerable. Affected functions are of the form d2i_*_bio or d2i_*_fp, for example d2i_X509_bio or d2i_PKCS12_fp. Applications using the memory based ASN1 functions (d2i_X509, d2i_PKCS12 etc) are not affected. In particular the SSL/TLS code of OpenSSL is *not* affected. Applications only using the PEM routines are not affected. S/MIME or CMS applications using the built in MIME parser SMIME_read_PKCS7 or SMIME_read_CMS *are* affected. The OpenSSL command line utility is also affected if used to process untrusted data in DER format. Note: although an application using the SSL/TLS portions of OpenSSL is not automatically affected it might still call a function such as d2i_X509_bio on untrusted data and be vulnerable.

Affected Versions:
OpenSSL 0.9.8 through 0.9.8u and 1.0.0 through 1.0.0g and 1.0.1.

Recommendations:
Update to version 0.9.8v, 1.0.0i, 1.0.1a or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2012-2110

References:

https://www.openssl.org/news/secadv/20120419.txt

Severity
High
CVSS Score
7.5
Published
2021-08-16
Modified
2021-08-17
Category
General

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