Home/CVE/The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr op
CVE
CVE-2015-8660
The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr op
The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application.
MEDIUM · CVSS 6.7
EPSS 0.58352
Act now
- EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
- EPSS percentile: top 2% of all CVEs by exploitation likelihood
- Reliable Metasploit module available (rank: Good) - weaponised exploit code
- Public exploit or PoC is available
Sigma rules0
YARA rules0
Look this up elsewhere - one-click external pivots
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How to read a CVE - triage first, then detect and patch
This page is every public fact about CVE-2015-8660, cross-linked. Its job is to answer one question fast - does this need my attention now? - and then hand you the two things you do about it. Here is how an analyst reads it.
Triage: should I act now? Four signals, and they are not interchangeable:
CVSSseverity - how bad it is IF exploited, 0-10. A high CVSS alone is not urgency; a flaw can be a perfect 10 and never actually be attacked.
EPSSprobability - a model’s estimate of the chance it is exploited in the next 30 days, 0-1. This is the “will it actually happen” signal.
CISA KEVconfirmed - it is being exploited in the wild right now. The strongest signal on the page; KEV beats any score.
Weaponisedavailability - public exploits / PoCs, and especially Metasploit modules rated Excellent / Great. Reliable, packaged exploit code means low-skill attackers can use it today.
How they combine: KEV, or a dependable Metasploit module, means patch now regardless of CVSS. High CVSS + low EPSS + no exploit is real but not an emergency - schedule it. Low CVSS but KEV-listed still gets patched now. The verdict above already weighed these for you; this is how it got there.
Then what - two workflows:
Detectwhen you cannot patch today, follow this CVE to the ATT&CK techniques it enables, then Build a SIEM detection (the green button) - author a rule, test it in Atomic, deploy it. That buys visibility while the patch waits.
PatchAffected products / packages tell you if you are exposed; Fixed versions by distribution and Vendor advisories give the exact version that closes it.
Reading order for the panels below: verdict + badges, then Public exploits / Metasploit (is it weaponised), then ATT&CK techniques + Sigma / IDS rules (can I detect it), then Affected products / packages + Fixed versions (am I exposed, what patches it), then Threat actors / IOCs (who uses it), then Scoring & timeline / references (the evidence).
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Weakness Classification
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Affected Products & Versions
3⚠
Public Exploits & PoCs
22These PoC and exploit links come from public sources and are not verified to be safe or functional. Review the code before running anything, and treat unverified entries as untrusted.
localLinux Kernel (Ubuntu / Fedora / RedHat) - 'Overlayfs' Local Privilege Escalation (Metasploit)verified
pocpacketstormsecurity.com · Ubuntu-14.04-LTS-15.10-overlayfs-Local-Root.htmlpacketstormsecurity.com
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Fixed versions by distribution
32The package version that resolves this CVE on each Linux distribution, from the vendor’s published security data. fixed in shows a patched version exists; open means the package is listed as affected with no fix yet.
oracle alldtrace-modules-4.1.12-37.6.2.el6uek fixed in 0:0.5.2-1.el6
oracle alldtrace-modules-4.1.12-37.6.2.el7uek fixed in 0:0.5.2-1.el7
oracle allkernel fixed in 0:3.10.0-327.28.2.el7
oracle allkernel-abi-whitelists open
oracle allkernel-debug open
oracle allkernel-debug-devel open
oracle allkernel-devel open
oracle allkernel-headers fixed in 0:3.10.0-327.28.2.el7
oracle allkernel-tools open
oracle allkernel-tools-libs open
oracle allkernel-tools-libs-devel open
oracle allkernel-uek open
oracle allkernel-uek-debug fixed in 0:4.1.12-37.6.2.el7uek
oracle allkernel-uek-debug-devel fixed in 0:4.1.12-37.6.2.el6uek
oracle allkernel-uek-devel open
oracle allkernel-uek-firmware open
oracle allperf open
oracle allpython-perf fixed in 0:3.10.0-327.28.2.el7
suse sle15kernel-default fixed in 0:4.12.14-23.1
suse sle15kernel-default-devel open
suse sle15kernel-default-extra fixed in 0:4.12.14-23.1
suse sle15kernel-devel open
suse sle15kernel-devel-rt open
suse sle15kernel-docs fixed in 0:4.12.14-23.1
suse sle15kernel-macros open
suse sle15kernel-obs-build fixed in 0:4.12.14-23.1
suse sle15kernel-source open
suse sle15kernel-source-azure open
suse sle15kernel-source-rt open
suse sle15kernel-syms fixed in 0:4.12.14-23.1
suse sle15kernel-vanilla-base fixed in 0:4.12.14-23.1
suse sle15reiserfs-kmp-default fixed in 0:4.12.14-23.1
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Metasploit Modules
1Weaponised exploit modules in the Metasploit Framework. Rank is Metasploit’s reliability rating - Excellent/Great/Good means dependable, real-world exploit code (a strong “act now” signal), not a fragile PoC.
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Scoring & Timeline
6.7
MEDIUM · CVSS v3.1 · [email protected]
Attack Vector
Network
Adjacent
Local
Physical
Attack Complexity
Low
High
Privileges Required
None
Low
High
User Interaction
None
Required
Scope
Unchanged
Changed
Confidentiality
None
Low
High
Integrity
None
Low
High
Availability
None
Low
High
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Vendor Advisories
13suse-csafopenSUSE-SU-2024:10128-1
suse-csafSUSE-SU-2016:0751-1
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References & Sources
19Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.htmlMailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1532.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1539.htmlThird Party Advisory