#VU40303 Input validation error in Botan and Debian Linux - CVE-2015-5726

Vulnerability identifier: #VU40303

Vulnerability 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-2015-5726

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Botan
Universal components / Libraries / Libraries used by multiple products
Debian Linux
Operating systems & Components / Operating system

Vendor: Randombit
Debian

Description

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

The BER decoder in Botan 0.10.x before 1.10.10 and 1.11.x before 1.11.19 allows remote attackers to cause a denial of service (application crash) via an empty BIT STRING in ASN.1 data.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Botan: 1.10.0 - 1.11.18

Debian Linux: 1.10.0 - 8.0

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External links
https://botan.randombit.net/security.html
https://www.debian.org/security/2016/dsa-3565

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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.