Buffer overflow in strongswan (Alpine package)

1) Buffer overflow

EUVDB-ID: #VU15165

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-2018-17540

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service attacks.

The vulnerability exists due to a boundary error when processing certificates within gmp plugin. A remote attacker can create a specially crafted certificate, pass it to the affected application and trigger application crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

strongswan (Alpine package): 4.6.1-r0 - 5.5.3-r1

strongswan (Alpine package):

CPE2.3

• cpe:2.3:a:alpine:strongswan_alpine_package:4.6.1-r0:*:*:*:*:alpine_linux:*:2.5
• cpe:2.3:a:alpine:strongswan_alpine_package:5.1.3-r0:*:*:*:*:alpine_linux:*:2.6
• cpe:2.3:a:alpine:strongswan_alpine_package:5.1.3-r1:*:*:*:*:alpine_linux:*:2.7
• cpe:2.3:a:alpine:strongswan_alpine_package::*:*:*:*:alpine_linux:*:*

External links

https://git.alpinelinux.org/aports/commit/?id=1cb8f327fe893b5f83d52d1e8686ca8085a15412
https://git.alpinelinux.org/aports/commit/?id=d01a6eb23f238d10cc1b2a2e3cbfd15ca2f4b3c2
https://git.alpinelinux.org/aports/commit/?id=5bf14e0f89d033ac01ad2d80fb49921dd7d35a2f
https://git.alpinelinux.org/aports/commit/?id=e043f4360d1a4acefce7229bd7836a3db968e86c
https://git.alpinelinux.org/aports/commit/?id=2103efcf25f1ef29921454f1fb1094ed3f86c33a

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.