GSocketClient in GNOME GLib through 2.62.4 may occasionally connect directly to a target address instead of connecting via a proxy server when configured to do so, because the proxy_addr field is mishandled. This bug is timing-dependent and may occur only sporadically depending on network delays. The greatest security relevance is in use cases where a proxy is used to help with privacy/anonymity, even though there is no technical barrier to a direct connection. NOTE: versions before 2.60 are unaffected.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-6750
• https://bugzilla.suse.com/show_bug.cgi?id=1160668
• https://gitlab.gnome.org/GNOME/glib/issues/1989
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5RIFEDSRJ4P3WFCMDUOFQ2LEILZLMDW7/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KJMLGW55HOQXHMTIPH2PWXFRBNBWVO4W/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MEM7MMAXMWCDPUH4MTUZ763MBB64RRLJ/
• https://security.netapp.com/advisory/ntap-20200127-0001/