Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3131 Kernel data leak via ptrace(PT_LWPINFO) 7 December 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-1086 Reference: ESB-2017.2911 Original Bulletin: link: http://www.vuxml.org/freebsd/34a3f9b5-dab3-11e7-b5af-a4badb2f4699.html - --------------------------BEGIN INCLUDED TEXT-------------------- FreeBSD -- Kernel data leak via ptrace(PT_LWPINFO) Affected packages 11.1 <= FreeBSD-kernel < 11.1_4 11.0 <= FreeBSD-kernel < 11.0_15 10.4 <= FreeBSD-kernel < 10.4_3 10.3 <= FreeBSD-kernel < 10.3_24 Details VuXML ID 34a3f9b5-dab3-11e7-b5af-a4badb2f4699 Discovery 2017-11-15 Entry 2017-12-06 Problem Description: Not all information in the struct ptrace_lwpinfo is relevant for the state of any thread, and the kernel does not fill the irrelevant bytes or short strings. Since the structure filled by the kernel is allocated on the kernel stack and copied to userspace, a leak of information of the kernel stack of the thread is possible from the debugger. Impact: Some bytes from the kernel stack of the thread using ptrace(PT_LWPINFO) call can be observed in userspace. References CVE Name CVE-2017-1086 FreeBSD Advisory SA-17:08.ptrace - --------------------------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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. 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 iQIVAwUBWiig8Yx+lLeg9Ub1AQj4Yw//Zs3ak+CySMvBjiIPgWETVipUOBeLBFxZ kMCBtoXVhcZbssgsWXJY+e5ys53QMMl2TtcO48/kZDfZnGSusHItohQ1wTdG+2TJ ynoDD1z6gVbZmX9QyxYi9MUyBitSxdV5esYPWmB9VFhJRObJQcHoaO227YVpNtCB CxucrzPepeNlqdI9NQjWZ+ysSlSpaLNdAM7dDOwTH5kziUQKh8srJwuub8HVlkqp p6FqoQCgtJ3/5esYoo91nfLCcx4vBhnE2/HW91BIlApA3JQH/uT8PCM/j1iFyDif q5KtqyMxxRhKBb9crwA/0KP7CnXoHUF+qiYOtkIgUYSl/ia+NhMgy+nAugtzn0t5 zfKbHsjI4FkHIHXNwr716VZ/t6QbEHIvSzype31xmhsNRqoefh6vH4SkvV/Zs8JC 1Hth5bMRBstNuQ/SAV743WLjULnngD04qAY10BUNGeQEhJoSbfegMK6swNjaPLkh uEDfHnFr1fIQ5p34cQihl9rvSmB1V8EGkJMklgj3GdCEGMDykZSGzhISv/OrWHjm T8vzrzunEeFrTUOKW0PW7U3OZFFlGgp6boKGGdH44RHRKLoEtuUCzdyN5pa/6990 FnErINOcr+TOD0Cmk/Tnb3WNZGJi8QTgCdzAL8afJ9PO6JrflOcYx0nR0kxIRtsn gXgoVaLNW6A= =4dE9 -----END PGP SIGNATURE-----