ID CVE-2017-16997
Summary 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.
References
Vulnerable Configurations
  • cpe:2.3:a:gnu:glibc:2.19:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.19:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.20:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.20:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.21:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.21:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.22:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.22:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.23:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.23:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.25:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.25:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:glibc:2.26:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:glibc:2.26:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
    cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
CVSS
Base: 9.3 (as of 15-10-2020 - 13:28)
Impact:
Exploitability:
CWE CWE-426
CAPEC
  • Leveraging/Manipulating Configuration File Search Paths
    This pattern of attack sees an adversary load a malicious resource into a program's standard path so that when a known command is executed then the system instead executes the malicious component. The adversary can either modify the search path a program uses, like a PATH variable or classpath, or they can manipulate resources on the path to point to their malicious components. J2EE applications and other component based applications that are built from multiple binaries can have very long list of dependencies to execute. If one of these libraries and/or references is controllable by the attacker then application controls can be circumvented by the attacker.
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:N/AC:M/Au:N/C:C/I:C/A:C
redhat via4
advisories
  • rhsa
    id RHBA-2019:0327
  • rhsa
    id RHSA-2018:3092
rpms
  • glibc-0:2.17-260.el7
  • glibc-common-0:2.17-260.el7
  • glibc-debuginfo-0:2.17-260.el7
  • glibc-debuginfo-common-0:2.17-260.el7
  • glibc-devel-0:2.17-260.el7
  • glibc-headers-0:2.17-260.el7
  • glibc-static-0:2.17-260.el7
  • glibc-utils-0:2.17-260.el7
  • nscd-0:2.17-260.el7
refmap via4
bid 102228
confirm
Last major update 15-10-2020 - 13:28
Published 18-12-2017 - 01:29
Last modified 15-10-2020 - 13:28
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