Detections
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Cisco IOS XE Multiple OpenSSL Vulnerabilities (CSCut46130 / CSCut46126)

high Nessus Plugin ID 90526

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Synopsis

The remote device is missing a vendor-supplied security patch.

Description

The remote Cisco IOS XE device is missing a vendor-supplied security patch and has an IOS service configured to use TLS or SSL. It is, therefore, affected by the following vulnerabilities in the bundled OpenSSL library :

 - A use-after-free condition exists in the d2i_ECPrivateKey() function due to improper processing of malformed EC private key files during import. A remote attacker can exploit this to dereference or free already freed memory, resulting in a denial of service or other unspecified impact. (CVE-2015-0209)

 - An invalid read error exists in the ASN1_TYPE_cmp() function due to improperly performed boolean-type comparisons. A remote attacker can exploit this, via a crafted X.509 certificate to an endpoint that uses the certificate-verification feature, to cause an invalid read operation, resulting in a denial of service.
 (CVE-2015-0286)

 - A flaw exists in the ASN1_item_ex_d2i() function due to a failure to reinitialize 'CHOICE' and 'ADB' data structures when reusing a structure in ASN.1 parsing.
 This allows a remote attacker to cause an invalid write operation and memory corruption, resulting in a denial of service. (CVE-2015-0287)

 - A NULL pointer dereference flaw exists in the X509_to_X509_REQ() function due to improper processing of certificate keys. This allows a remote attacker, via a crafted X.509 certificate, to cause a denial of service. (CVE-2015-0288)

 - A NULL pointer dereference flaw exists in the PKCS#7 parsing code due to incorrect handling of missing outer ContentInfo. This allows a remote attacker, using an application that processes arbitrary PKCS#7 data and providing malformed data with ASN.1 encoding, to cause a denial of service. (CVE-2015-0289)

 - An integer underflow condition exists in the EVP_DecodeUpdate() function due to improper validation of base64 encoded input when decoding. This allows a remote attacker, using maliciously crafted base64 data, to cause a segmentation fault or memory corruption, resulting in a denial of service or possibly the execution of arbitrary code. (CVE-2015-0292)

 - A flaw exists in servers that both support SSLv2 and enable export cipher suites due to improper implementation of SSLv2. A remote attacker can exploit this, via a crafted CLIENT-MASTER-KEY message, to cause a denial of service. (CVE-2015-0293)

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCut46130.

See Also

http://www.nessus.org/u?2beef118

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCut46130

https://www.openssl.org/news/secadv/20150319.txt

Plugin Details

Severity: High

ID: 90526

File Name: cisco-sa-20150320-openssl-iosxe.nasl

Version: 1.7

Type: combined

Family: CISCO

Published: 4/14/2016

Updated: 5/3/2024

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/20/2015

Vulnerability Publication Date: 5/6/2014

Reference Information

CVE: CVE-2015-0209, CVE-2015-0286, CVE-2015-0287, CVE-2015-0288, CVE-2015-0289, CVE-2015-0292, CVE-2015-0293

BID: 73225, 73227, 73228, 73231, 73232, 73237, 73239