CVE-2010-3904Linux Kernel Improper Input Validation Vulnerability
CVE-2010-3904 is a unchecked quantity in Linux Kernel, rated high (7.8 on CVSS 3.1).
Why this priority: Exploited in the wild: listed in CISA's KEV catalog.
Published · Updated · NVD status: Analyzed
What it is
A count or size from input is not checked before it is used.
How it is reached
An attacker can exploit it by someone who can already run code or sign in on the machine, with an ordinary user account, and nobody has to click anything.
What an attacker gains
A successful attack can read the data it protects, change data or behaviour and take it offline. In practice, this kind of flaw lets an attacker drive the component into behaviour its authors did not intend.
Is it being exploited?
CISA added it to the Known Exploited Vulnerabilities catalog on 2023-05-12: it is being exploited in the wild. EPSS estimates a 16% chance of exploitation activity in the next 30 days, higher than 97% of scored CVEs.
What to do
- Treat it as urgent: it is on CISA's KEV list. CISA's deadline for US federal agencies: 2023-06-02.
- Upgrade Linux Kernel to 2.6.36 or later. The patch notes are linked below.
- Limit who can run code or sign in on the hosts that run it.
- Check exposed instances for signs of compromise, not only for the version.
Description from NVD
The rds_page_copy_user function in net/rds/page.c in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux kernel before 2.6.36 does not properly validate addresses obtained from user space, which allows local users to gain privileges via crafted use of the sendmsg and recvmsg system calls.
What this means for your architecture.
A CVE names a product. Whether it matters depends on where that product sits in your systems: what reaches it, which trust boundary it guards and what it can reach once compromised. Veriom maps your components, their relationships and your trust boundaries from your code, cloud and delivery evidence, so you can see where a component like this sits. The radar itself does not look at your systems.
Components it touches
- Operating systems on servers, workstations or devices. Everything on the host inherits the flaw.
- Interfaces that accept external input. The flaw sits at the input boundary of the affected component.
Trust boundaries in play
- Host boundary. The attacker needs a foothold on the machine first; the flaw turns a small foothold into a bigger one.
- At the input boundary of the affected component. An attacker who crosses it can drive the component into behaviour its authors did not intend.
Questions to answer about your own systems
- Where does Linux Kernel run in your systems, and at which version?
- Which of those hosts also run code or users you do not fully trust?
- What can it reach once compromised: which data stores, secrets and services?
Read more
Patches and commits
Advisories
- lists.opensuse.org/opensuse-security-announce/2010-10/msg00008.html
- lists.opensuse.org/opensuse-security-announce/2010-11/msg00004.html
- lists.opensuse.org/opensuse-security-announce/2011-02/msg00000.html
- secunia.com/advisories/46397
- securitytracker.com/id?1024613
- www.kb.cert.org/vuls/id/362983
- www.redhat.com/support/errata/RHSA-2010-0792.html
- www.redhat.com/support/errata/RHSA-2010-0842.html
- www.securityfocus.com/archive/1/520102/100/0/threaded
- www.ubuntu.com/usn/USN-1000-1
- www.vmware.com/security/advisories/VMSA-2011-0012.html
- www.vupen.com/english/advisories/2011/0298
Exploits and proofs of concept
Sources
- CVE records and CVSS scores from the NVD CVE API. This product uses the NVD API but is not endorsed or certified by the NVD.
- Exploitation status from CISA’s Known Exploited Vulnerabilities catalog.
- Exploit likelihood from FIRST’s Exploit Prediction Scoring System (EPSS), refreshed daily.
- Explanations are written by Veriom from fixed templates over each record’s data, not by a person reviewing each CVE. Descriptions are quoted from the records as published.