glibc is vulnerable to privilege escalation attacks. The vulnerability exists as elf/dl-load.c in the GNU C Library (aka glibc or libc6) 2.19 through 2.26 mishandles RPATH and RUNPATH containing $ORIGIN for a privileged (setuid or AT_SECURE) program, which allows local users to gain privileges via a Trojan horse library in the current working directory, related to the fillin_rpath and decompose_rpath functions. This is associated with misinterpretion of an empty RPATH/RUNPATH token as the “./” directory. NOTE: this configuration of RPATH/RUNPATH for a privileged program is apparently very uncommon; most likely, no such program is shipped with any common Linux distribution.
CPE | Name | Operator | Version |
---|---|---|---|
glibc | eq | 2.17__222.el7 |
www.securityfocus.com/bid/102228
access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index
access.redhat.com/errata/RHBA-2019:0327
access.redhat.com/errata/RHSA-2018:3092
access.redhat.com/security/updates/classification/#moderate
bugs.debian.org/884615
bugzilla.redhat.com/show_bug.cgi?id=1349967
bugzilla.redhat.com/show_bug.cgi?id=1349982
bugzilla.redhat.com/show_bug.cgi?id=1372304
bugzilla.redhat.com/show_bug.cgi?id=1401665
bugzilla.redhat.com/show_bug.cgi?id=1408964
bugzilla.redhat.com/show_bug.cgi?id=1448107
bugzilla.redhat.com/show_bug.cgi?id=1461231
bugzilla.redhat.com/show_bug.cgi?id=1471405
bugzilla.redhat.com/show_bug.cgi?id=1476120
bugzilla.redhat.com/show_bug.cgi?id=1505451
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bugzilla.redhat.com/show_bug.cgi?id=1531168
bugzilla.redhat.com/show_bug.cgi?id=1560641
bugzilla.redhat.com/show_bug.cgi?id=1563046
bugzilla.redhat.com/show_bug.cgi?id=1563747
bugzilla.redhat.com/show_bug.cgi?id=1564638
bugzilla.redhat.com/show_bug.cgi?id=1566623
bugzilla.redhat.com/show_bug.cgi?id=1579727
sourceware.org/bugzilla/show_bug.cgi?id=22625
sourceware.org/ml/libc-alpha/2017-12/msg00528.html