Integer overflow in asterisk (Alpine package)

1) Integer overflow

EUVDB-ID: #VU33398

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-7251

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

An Integer Signedness issue (for a return code) in the res_pjsip_sdp_rtp module in Digium Asterisk versions 15.7.1 and earlier and 16.1.1 and earlier allows remote authenticated users to crash Asterisk via a specially crafted SDP protocol violation.

Mitigation

Install update from vendor's website.

Vulnerable software versions

asterisk (Alpine package): 15.6.1-r0

CPE2.3

• cpe:2.3:o:alpine:asterisk_alpine_package:15.6.1-r0:*:*:*:*:alpine_linux:*:3.6

External links

https://git.alpinelinux.org/aports/commit/?id=fd0aefe7beb083e683ebb7f904469d01e2b71f16
https://git.alpinelinux.org/aports/commit/?id=b8ed9736efcaee1cfb71d1c71773d8e62ee169d8
https://git.alpinelinux.org/aports/commit/?id=de555bb30f216410e565ff8c6e8983703d16d648
https://git.alpinelinux.org/aports/commit/?id=3037ceeb75de0f253b86db6e56d7e28eeb95cbf6
https://git.alpinelinux.org/aports/commit/?id=d4f71b2cd087e99656c7404cd15985a5f5162472

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.