Debian update for openssl

Published: 2018-03-30

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-3738 CVE-2018-0739
CWE-ID	CWE-120 CWE-400
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Debian Linux Operating systems & Components / Operating system
Vendor	Debian

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU9595

Risk: Low

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

CVE-ID: CVE-2017-3738

CWE-ID: CWE-120 - Buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.

The weakness exists due to buffer overflow in the AVX2 Montgomery multiplication procedure used in exponentiation with 1024-bit moduli. A remote attacker can cause the server to share the DH1024 private key among multiple clients and perform attack on TLS.

Mitigation

Update the affected package to version: 1.0.1t-1+deb8u8, 1.1.0f-3+deb9u2

Vulnerable software versions

Debian Linux: All versions

CPE2.3

cpe:2.3:o:debian:debian_linux:*:*:*:*:*:*:*:*

External links

https://www.openssl.org/news/secadv/20171207.txt

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) Resource exhaustion

EUVDB-ID: #VU11294