FreeBSD Security Advisories
2001-Feb-07 11:39 UTC
FreeBSD Ports Security Advisory: FreeBSD-SA-01:19.ja-xklock
-----BEGIN PGP SIGNED MESSAGE----- ============================================================================FreeBSD-SA-01:19 Security Advisory FreeBSD, Inc. Topic: ja-xklock port contains a local root compromise Category: ports Module: ja-xklock Announced: 2001-02-07 Credits: Found during internal auditing Affects: Ports collection prior to the correction date. Corrected: See below. Vendor status: N/A FreeBSD only: No I. Background The ja-xklock is a localized xlock clone, which locks an X display. II. Problem Description The ja-xklock port, versions 2.7.1 and earlier, contains an exploitable buffer overflow. Because the xklock program is also setuid root, unprivileged local users may gain root privileges on the local system. Because the ja-xklock port is unmaintained and due to the software's age, this vulnerability has not yet been corrected. Additionally, the ja-xklock port is scheduled for removal from the ports system if it has not been audited and fixed within one month of discovery. In the event the ja-xlock port is corrected, this advisory will be rereleased with updated information. The ja-xklock port is not installed by default, nor is it "part of FreeBSD" as such: it is part of the FreeBSD ports collection, which contains over 4500 third-party applications in a ready-to-install format. The ports collections shipped with FreeBSD 3.5.1 and 4.2 contain this problem since it was discovered after the releases. FreeBSD makes no claim about the security of these third-party applications, although an effort is underway to provide a security audit of the most security-critical ports. III. Impact Unprivileged local users may gain root privileges on the local system. If you have not chosen to install the ja-xklock port/package, then your system is not vulnerable to this problem. IV. Workaround Deinstall the ja-xklock port/package, if you have installed it. V. Solution It is suggested that an alternative, such as xlock or xlockmore, is used instead of the ja-xklock port. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (FreeBSD) Comment: For info see http://www.gnupg.org iQCVAwUBOoGkUFUuHi5z0oilAQGzvwQAkiQisnaY94dUvy+a/RJoeY5j04yQf92u P8I5aTWn6CfVP2a5xpRW8I2xRpJtiUAVzNmAYflW9gGgzQL9GXHy8roiaYMP+V7Y X3zWhRV7Kb/L9jVKEGurwLaygF6m11AkmWUKbb8Hi95rzsJokTWA93MZK+exKfZ9 lFBOA3QC2vA=gIGE -----END PGP SIGNATURE----- This is the moderated mailing list freebsd-announce. The list contains announcements of new FreeBSD capabilities, important events and project milestones. See also the FreeBSD Web pages at http://www.freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-announce" in the body of the message