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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.70%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.8 HIGHCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 2.70% probability · 85th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-426
- Affected
- gnu/glibc · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux workstation
- Source
- security@debian.org
References
- http://www.securityfocus.com/bid/102228Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Third Party Advisory
- https://bugs.debian.org/884615Issue Tracking, Mailing List, Patch, Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=22625Issue Tracking, Patch, Third Party Advisory
- https://sourceware.org/ml/libc-alpha/2017-12/msg00528.htmlIssue Tracking, Patch, Third Party Advisory
- http://www.securityfocus.com/bid/102228Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHBA-2019:0327Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3092Third Party Advisory
- https://bugs.debian.org/884615Issue Tracking, Mailing List, Patch, Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=22625Issue Tracking, Patch, Third Party Advisory
- https://sourceware.org/ml/libc-alpha/2017-12/msg00528.htmlIssue Tracking, Patch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.