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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.2562 [DLA 1482-1] libx11 security update 30 August 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: libx11 Publisher: Debian Operating System: Debian GNU/Linux 8 UNIX variants (UNIX, Linux, OSX) Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2018-14600 CVE-2018-14599 CVE-2018-14598 Original Bulletin: https://lists.debian.org/debian-lts-announce/2018/08/msg00030.html Comment: This advisory references vulnerabilities in products which run on platforms other than Debian. It is recommended that administrators running libx11 check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- Package : libx11 Version : 2:1.6.2-3+deb8u2 CVE ID : CVE-2018-14598 CVE-2018-14599 CVE-2018-14600 Several issues were discovered in libx11, the client interface to the X Windows System. The functions XGetFontPath, XListExtensions, and XListFonts are vulnerable to an off-by-one override on malicious server responses. A malicious server could also send a reply in which the first string overflows, causing a variable set to NULL that will be freed later on, leading to a segmentation fault and Denial of Service. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to a Denial of Service or possibly remote code execution. For Debian 8 "Jessie", these problems have been fixed in version 2:1.6.2-3+deb8u2. We recommend that you upgrade your libx11 packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBW4c9XGaOgq3Tt24GAQiteRAAq6B2GcC+tgGAqPBnZSpmhY/vggOJw7Qh 0mvsE/0gPsZ8lBZpAclEYZDlVpqd/HRyXudEu0eI2NZoXTDBn03zQrFPG4oTja4Q F4VNfs4YHEmsHfEVRwI8WG/v2u2GDxjPiKQEjQARYQbP/XMEpbUKvhGxfDEJ3IyH teD2IWUItp+CWYlZIoxWp3sOqbbwv7iXwsWX5cxeeAfzbxyGYXeKgckpM3zSRKAs KiLBkl+no3e3LWxKQRy25X41oAKdSR5gfM9O0CsmKEr6KuF26b0kmJOE7JdR7lum H+7VaZBpf9ev2H4yiguzsglrmx2aw/LmRUDW7xbPJSU7J6xb90wXbvnqYU1tqYyA 0WBWAorF9I3hllnDiieKS2ehWBaq9G7UEA6nVmRPPNkzORRevT7MP0yGrToXh6n4 SPLTfzFRnEL6wuMUlVQwpmbWLEKbz6LO6SCWLK6GTIuQX72VEVnuNLAf1NN188rR p6pdbvkC9+BybbOQtR8ccnxSIb+U6x3AqZwd6rgDvDOY6YMazDgy5eU3UPYeffoO 27ktGGH02kKg5WcyxR0BZQRV8HxdW5tL+c1yveAhlABurVPGxLkcYfxvavOFytHZ qp/6bmP93OiKEhuXYvUKTx5b0WRY0IYEuhcyRvTuX3IEaGPDm7MxnTejXpQU0t64 435W8Fy2hGM= =nCSc -----END PGP SIGNATURE-----