#VU38459 Buffer overflow in librest - CVE-2015-2675

Vulnerability identifier: #VU38459

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-2675

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
librest

Vendor: Gnome Development Team

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The OAuth implementation in librest before 0.7.93 incorrectly truncates the pointer returned by the rest_proxy_call_get_url function, which allows remote attackers to cause a denial of service (application crash) via running the EnsureCredentials method from the org.gnome.OnlineAccounts.Account interface on an object representing a Flickr account.

Mitigation
Install update from vendor's website.

Vulnerable software versions

librest: 0.7.92

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External links
https://rhn.redhat.com/errata/RHSA-2015-2237.html
https://www.openwall.com/lists/oss-security/2015/03/23/8
https://bugzilla.gnome.org/show_bug.cgi?id=742644
https://bugzilla.redhat.com/show_bug.cgi?id=1183982
https://bugzilla.redhat.com/show_bug.cgi?id=1199049
https://git.gnome.org/browse/librest/commit/?id=b50ace7738ea03817acdad87fb2b338a86018329

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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.