#VU25856 Out-of-bounds read in usrsctp - CVE-2019-20503

Vulnerability identifier: #VU25856

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-20503

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
usrsctp
Universal components / Libraries / Libraries used by multiple products

Vendor: sctplab

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in sctp_load_addresses_from_init in usrsctp. A remote attacker can pass specially crafted data to the application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

usrsctp: 0.9.3.0

---

External links
https://bugs.chromium.org/p/project-zero/issues/detail?id=1992
https://github.com/sctplab/usrsctp/commit/790a7a2555aefb392a5a69923f1e9d17b4968467

---

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.