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AIX OpenSSL Advisory : openssl_advisory20.asc
critical Nessus Plugin ID 92323
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Synopsis
The remote AIX host has a version of OpenSSL installed that is affected by multiple vulnerabilities.Description
The version of OpenSSL installed on the remote AIX host is affected by the following vulnerabilities :- A heap buffer overflow condition exists in the EVP_EncodeUpdate() function within file crypto/evp/encode.c that is triggered when handling a large amount of input data. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-2105)
- A heap buffer overflow condition exists in the EVP_EncryptUpdate() function within file crypto/evp/evp_enc.c that is triggered when handling a large amount of input data after a previous call occurs to the same function with a partial block. An unauthenticated, remote attacker can exploit this to cause a denial of service condition. (CVE-2016-2106)
- A remote code execution vulnerability exists in the ASN.1 encoder due to an underflow condition that occurs when attempting to encode the value zero represented as a negative integer. An unauthenticated, remote attacker can exploit this to corrupt memory, resulting in the execution of arbitrary code. (CVE-2016-2108)
- Multiple unspecified flaws exist in the d2i BIO functions when reading ASN.1 data from a BIO due to invalid encoding causing a large allocation of memory.
An unauthenticated, remote attacker can exploit these to cause a denial of service condition through resource exhaustion. (CVE-2016-2109)
- An out-of-bounds read error exists in the X509_NAME_oneline() function within file crypto/x509/x509_obj.c when handling very long ASN1 strings. An unauthenticated, remote attacker can exploit this to disclose the contents of stack memory.
(CVE-2016-2176)
Solution
A fix is available and can be downloaded from the IBM AIX website.See Also
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory20.asc
Plugin Details
Severity: Critical
ID: 92323
File Name: aix_openssl_advisory20.nasl
Version: 1.10
Type: local
Family: AIX Local Security Checks
Published: 7/15/2016
Updated: 4/21/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
Vulnerability Information
CPE: cpe:/o:ibm:aix, cpe:/a:openssl:openssl
Required KB Items: Host/AIX/lslpp, Host/local_checks_enabled, Host/AIX/version
Patch Publication Date: 7/12/2016
Vulnerability Publication Date: 4/25/2016
Reference Information
CVE: CVE-2016-2105, CVE-2016-2106, CVE-2016-2108, CVE-2016-2109, CVE-2016-2176