#VU39767 Integer overflow in Botan - CVE-2016-9132

Vulnerability identifier: #VU39767

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2016-9132

CWE-ID: CWE-190

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Botan
Universal components / Libraries / Libraries used by multiple products

Vendor: Randombit

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

In Botan 1.8.0 through 1.11.33, when decoding BER data an integer overflow could occur, which would cause an incorrect length field to be computed. Some API callers may use the returned (incorrect and attacker controlled) length field in a way which later causes memory corruption or other failure.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Botan: 1.8.0 - 1.8.15, 1.9.0 - 1.9.18, 1.10.0 - 1.11.33

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External links
https://www.securityfocus.com/bid/95879
https://github.com/randombit/botan/commit/987ad747db6d0d7e36f840398f3cf02e2fbfd90f
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4OUDGVRQYQUL7F5MRP3LAV7EHRJG4BBE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z2Y3JLMTE3VIV4X5X6SXVZTJBDDLCS3D/

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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.