Input validation error in openssl (Alpine package)

1) Input validation error

EUVDB-ID: #VU32244

Risk: Medium

CVSSv3.1: 6.5 [AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-0797

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (heap memory corruption or NULL pointer dereference) or possibly have unspecified other impact via a long digit string that is mishandled by the (1) BN_dec2bn or (2) BN_hex2bn function, related to crypto/bn/bn.h and crypto/bn/bn_print.c.

Mitigation

Install update from vendor's website.

Vulnerable software versions

openssl (Alpine package): 1.0.1-r0 - 1.0.2h-r2-r0

External links

http://git.alpinelinux.org/aports/commit/?id=6ea715958d6486933e7cc3ca163e3d0691c9629d
http://git.alpinelinux.org/aports/commit/?id=70b8770d37d514044077c7258c0e6e81aeeee5fe
http://git.alpinelinux.org/aports/commit/?id=7b3b75b5c977b3a6fa91c6a48349d55fc7e31663
http://git.alpinelinux.org/aports/commit/?id=346532027d2b8b8d5cac13a2b7d86820dfaf34b7

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.