Out-of-bounds read in portable SCTP userland stack (usrsctp)



| Updated: 2021-07-01
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-20503
CWE-ID CWE-125
Exploitation vector Network
Public exploit N/A
Vulnerable software
 usrsctp
Universal components / Libraries / Libraries used by multiple products

Vendor sctplab

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

Updated 11.01.2021

Added fixed version.

1) Out-of-bounds read

EUVDB-ID: #VU25856

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 - Out-of-bounds read

Exploit availability: No

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

CPE2.3 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.



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