Red Hat Bugzilla – Bug 243256
CVE-2007-0958 core-dumping unreadable binaries via PT_INTERP
Last modified: 2016-05-20 10:39:01 EDT
CVE-2004-1073 is still an issue -- a patched PoC can still cause a
coredump of a non-readable binary such as /usr/bin/sudo; PoC attached;
the tweak is question is adding:
eph.p_memsz = 4097;
Run "./poc /usr/bin/sudo" and a "core" spits out -- WFM on a 2.6.17.x
To reproduce, do
* grab poc at the end of advisory.
* add line "eph.p_memsz = 4096;" after "eph.p_filesz = 4096;"
where first "4096" is something equal to or greater than 4096.
* ./poc /usr/bin/sudo && ls -l
Here I get:
-rw------- 1 ad ad 102400 2007-01-15 19:17 core
---s--x--x 2 root root 101820 2007-01-15 19:15 /usr/bin/sudo
Check for MAY_READ as binfmt_misc.c does.
committed in stream rhel‑4.5.z build 55.0.1
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.