Memory corruption in quagga (Alpine package)

1) Memory corruption

EUVDB-ID: #VU10615

Risk: Low

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:Clear]

CVE-ID: CVE-2017-5495

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists due to unbounded memory allocation in the telnet 'vty' CLI. A remote attacker able to connect to the TCP ports can  send very long strings without a newline, cause the Quagga daemon to allocate unbounded memory and system crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

quagga (Alpine package): 1.0.20160315-r0 - 1.1.0-r0

CPE2.3

• cpe:2.3:a:alpine:quagga_alpine_package:1.0.20160315-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:quagga_alpine_package:1.0.20161017-r0:*:*:*:*:alpine_linux:*:3.3
• cpe:2.3:a:alpine:quagga_alpine_package:1.0.20161017-r1:*:*:*:*:alpine_linux:*:3.4

External links

https://git.alpinelinux.org/aports/commit/?id=229843962a976cdf2b578f422f4d8637fe4132fd
https://git.alpinelinux.org/aports/commit/?id=c00451450e78759def5a5ee4cba58a9b2b5c7042
https://git.alpinelinux.org/aports/commit/?id=ae75e0ae11cd230df0320590974156eb517cc2e0
https://git.alpinelinux.org/aports/commit/?id=ec34b88925091c8b60fce522f2cf672dbbef689e

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.