Multiple vulnerabilities in OpenSSL

1) Integer overflow in ssl3_get_client_hello()

EUVDB-ID: #VU24

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2177

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause denial of service conditions on the target system.
The vulnerability exists due to a boundary error in ssl3_get_client_hello() function. A remote attacker can cause integer overflow by sending specially crafted data and crash the service.
Successful exploitation of this vulnerability may cause the target service to crash.

Mitigation

The vendor has issued a source code fix, available at:

https://github.com/openssl/openssl/commit/a004e72b95835136d3f1ea90517f706c24c03da7

Vulnerable software versions

OpenSSL: 1.0.2c - 1.0.2

Oracle Solaris: 10 - 11.3

Oracle VM VirtualBox: 5.0.25 - 5.1.7

Oracle VM Server for x86: 3.2 - 3.4

Oracle Linux: 5 - 7

CPE2.3

• cpe:2.3:a:openssl_software_foundation:openssl:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:solaris:10:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:vm_virtualbox:5.0.27:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:vm_virtualbox:5.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:oracle_vm_server_for_x86:3.2:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:oracle_vm_server_for_x86:3.3:*:*:*:*:*:*:*
• cpe:2.3:a:oracle:oracle_vm_server_for_x86:3.4:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:5:*:*:*:*:*:*:*
• cpe:2.3:o:oracle:oracle_linux:6:*:*:*:*:*:*:*

External links

https://github.com/openssl/openssl/commit/a004e72b95835136d3f1ea90517f706c24c03da7
https://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
https://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
https://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
https://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
https://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds read

EUVDB-ID: #VU308

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-2180

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition within the TS_OBJ_print_bio() function in crypto/ts/ts_lib.c in the X.509 Public Key Infrastructure Time-Stamp Protocol (TSP) implementation in OpenSSL. A remote attacker can perform a denial of service (DoS) attack via a crafted time-stamp file that is mishandled by the "openssl ts" command.

Mitigation

Install update from vendor's website.

Vulnerable software versions

OpenSSL: 1.0.2c - 1.0.2

CPE2.3

External links

https://github.com/openssl/openssl/commit/0ed26acce328ec16a3aa635f1ca37365e8c7403a
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2180

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.