| Summary: | <net-libs/libgadu-1.12.0: missing ssl certificate validation (CVE-2013-4488) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Vulnerabilities | Assignee: | Gentoo Security <security> |
| Status: | RESOLVED FIXED | ||
| Severity: | minor | CC: | net-im, reavertm |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugzilla.redhat.com/show_bug.cgi?id=1025718 | ||
| Whiteboard: | B3 [glsa cve] | ||
| Package list: | Runtime testing required: | --- | |
| Bug Depends on: | 528240 | ||
| Bug Blocks: | |||
Maintainers, please call for stabilization if 1.12.0 is ready. Thank you CVE-2013-4488 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4488): libgadu before 1.12.0 does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers. This issue was resolved and addressed in GLSA 201508-02 at https://security.gentoo.org/glsa/201508-02 by GLSA coordinator Yury German (BlueKnight). |
From ${URL} : Libgadu, an open library for communicating using the protocol e-mail, was found to have missing the ssl certificate validation. The issue is that libgadu uses openSSL library for creating secure connections. A program using openSSL can perform SSL handshake by invoking the SSL_connect function. Some cetrificate validation errors are signaled through, the return values of the SSL_connect, while for the others errors SSL_connect returns OK but sets internal "verify result" flags. Application must call ssl_get_verify_result function to check if any such errors occurred. This check seems to be missing in libgadu. And thus a man-in-the-middle attack is possible failing all the SSL protection. Upstream suggested that it was a concious decision as libgadu is reverse-engineered implementation of a proprietary protocol, they had no control over the certificates used for SSL connections, so they would add a note to the documentation about this. References: http://seclists.org/oss-sec/2013/q4/202 https://bugzilla.novell.com/show_bug.cgi?id=848509 http://www.mail-archive.com/libgadu-devel@lists.ziew.org/msg01017.html @maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.