Information disclosure in GNOME GLib



Published: 2020-01-16 | Updated: 2020-02-24
Risk Low
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-6750
CWE-ID CWE-200
CWE-399
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Gnome GLib
Universal components / Libraries / Libraries used by multiple products

Vendor Gnome Development Team

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated: 24.02.2020

Changed bulletin status to patched, updated list of affected and fixed software, added vulnerability #2.

1) Information disclosure

EUVDB-ID: #VU24350

Risk: Low

CVSSv3.1: 2.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6750

CWE-ID: CWE-200 - Information Exposure

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

Gnome GLib: 2.60.0 - 2.63.5


CPE2.3 External links

http://bugzilla.suse.com/show_bug.cgi?id=1160668
http://gitlab.gnome.org/GNOME/glib/issues/1989

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.

2) Resource management error

EUVDB-ID: #VU25564

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

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

The vulnerability exists due to relative read when calling the g_printerr() function, which could lead to a denial of service from a setuid-root process being used to block access to the TTY for another user. A local user can block access to TTY for another user.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Gnome GLib: 2.60.0 - 2.63.5


CPE2.3 External links

http://gitlab.gnome.org/GNOME/glib/-/releases#2.63.6

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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



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