Vulnerability Details CVE-2017-16997
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.008
EPSS Ranking 73.3%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 9.3
References
- http://www.securityfocus.com/bid/102228
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2018:3092
- https://bugs.debian.org/884615
- https://sourceware.org/bugzilla/show_bug.cgi?id=22625
- https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html
- http://www.securityfocus.com/bid/102228
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2018:3092
- https://bugs.debian.org/884615
- https://sourceware.org/bugzilla/show_bug.cgi?id=22625
- https://sourceware.org/ml/libc-alpha/2017-12/msg00528.html
Products affected by CVE-2017-16997
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cpe:2.3:a:gnu:glibc:2.19
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cpe:2.3:a:gnu:glibc:2.20
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cpe:2.3:a:gnu:glibc:2.21
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cpe:2.3:a:gnu:glibc:2.22
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cpe:2.3:a:gnu:glibc:2.23
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cpe:2.3:a:gnu:glibc:2.25
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cpe:2.3:a:gnu:glibc:2.26
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cpe:2.3:o:redhat:enterprise_linux_desktop:7.0
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cpe:2.3:o:redhat:enterprise_linux_server:7.0
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cpe:2.3:o:redhat:enterprise_linux_workstation:7.0