Information disclosure in libsoup

1) Out-of-bounds read

EUVDB-ID: #VU29240

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17266

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 when processing NTLM messages in soup_ntlm_parse_challenge() function in soup-auth-ntlm.c. A remote attacker can send a specially crafted NTLM message to the application, trigger a heap-based buffer over-read and read sensitive data from system memory.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

libsoup: 2.65.1 - 2.68.0

External links

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912
http://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.md
http://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05ab
http://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266ad
http://gitlab.gnome.org/GNOME/libsoup/issues/173
http://security-tracker.debian.org/tracker/CVE-2019-17266
http://usn.ubuntu.com/4152-1/
http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1705054.html

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.