Information disclosure in glib (Alpine package)

1) Information disclosure

EUVDB-ID: #VU24350

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-6750

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

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

The vulnerability exists due to an error within the GSocketClient in GNOME GLib when processing proxy_addr field. A remote attacker force the system to connect to a specific server using a real address instead of pre-configured proxy address and gain knowledge of the victim's real IP address.

Exploitation of the vulnerability is timing-dependent and may occur only sporadically depending on network delays.

Mitigation

Install update from vendor's website.

Vulnerable software versions

glib (Alpine package): 2.60.4-r0 - 2.60.7-r0

CPE2.3

• cpe:2.3:a:alpine:glib_alpine_package:2.60.4-r0:*:*:*:*:alpine_linux:*:3.10
• cpe:2.3:a:alpine:glib_alpine_package:2.60.5-r0:*:*:*:*:alpine_linux:*:3.10
• cpe:2.3:a:alpine:glib_alpine_package:2.60.6-r0:*:*:*:*:alpine_linux:*:3.10

External links

https://git.alpinelinux.org/aports/commit/?id=77237d49b516317fdea1ebc585c3bbf30f766ff8
https://git.alpinelinux.org/aports/commit/?id=c43990edbd40871044e249a0223d247d11b25d7e

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.