CVE-2014-0196: Linux Kernel Race Condition, actively exploited

Description

The n_tty_write function in drivers/tty/n_tty.c in the Linux kernel through 3.14.3 does not properly manage tty driver access in the "LECHO & !OPOST" case, which allows local users to cause a denial of service (memory corruption and system crash) or gain privileges by triggering a race condition involving read and write operations with long strings.

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeUnchanged

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

F5 Big-ip Access Policy Manager≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Advanced Firewall Manager≥ 11.3.0 ≤ 11.5.1

F5 Big-ip Analytics≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Application Acceleration Manager≥ 11.4.0 ≤ 11.5.1

F5 Big-ip Application Security Manager≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Edge Gateway≥ 11.1.0 ≤ 11.3.0

F5 Big-ip Global Traffic Manager≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Link Controller≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Local Traffic Manager≥ 11.1.0 ≤ 11.5.1

F5 Big-ip Policy Enforcement Manager≥ 11.3.0 ≤ 11.5.1

F5 Big-ip Protocol Security Module≥ 11.1.0 ≤ 11.4.1

F5 Big-ip Wan Optimization Manager≥ 11.1.0 ≤ 11.3.0

F5 Big-ip Webaccelerator≥ 11.1.0 ≤ 11.3.0

F5 Big-iq Application Delivery Controller4.5.0

F5 Big-iq Centralized Management4.6.0

F5 Big-iq Cloud≥ 4.0.0 ≤ 4.5.0

F5 Big-iq Cloud And Orchestration1.0.0

F5 Big-iq Device≥ 4.2.0 ≤ 4.5.0

F5 Big-iq Security≥ 4.0.0 ≤ 4.5.0

F5 Enterprise Manager3.1.0 · 3.1.1

Canonical Ubuntu Linux10.04 · 12.04 · 12.10 · 13.10

Debian Linux6.0 · 7.0

Linux Kernel≥ 3.11 < 3.12.20 · ≥ 3.13 < 3.14.4 · ≥ 3.3 < 3.4.91 · ≥ 3.5 < 3.10.40

Oracle Linux6

Remediation

Fixed in

Linux Kernel≥ 3.12.20

Patch & vendor advisories

References

http://bugzilla.novell.com/show_bug.cgi?id=875690Issue TrackingPermissions RequiredThird Party Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=4291086b1f081b869c6d79e5b7441633dc3ace00Broken Link
http://linux.oracle.com/errata/ELSA-2014-0771.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00007.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2014-05/msg00012.htmlMailing ListThird Party Advisory
http://pastebin.com/raw.php?i=yTSFUBgZExploitMailing ListThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2014-0512.htmlThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1094232Issue TrackingPatchThird Party Advisory
http://secunia.com/advisories/59218Not Applicable
http://secunia.com/advisories/59262Broken Link

and 19 more references

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2014-0196 being actively exploited?

Yes. CVE-2014-0196 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 12 May 2023.

How severe is CVE-2014-0196?

CVE-2014-0196 has a CVSS 3.1 base score of 5.5, rated medium. EPSS estimates a 22.5% probability of exploitation.

Which products are affected by CVE-2014-0196?

Affected products include F5 Big-ip Access Policy Manager, F5 Big-ip Advanced Firewall Manager, F5 Big-ip Analytics, F5 Big-ip Application Acceleration Manager, F5 Big-ip Application Security Manager, and 19 more.

How do I fix CVE-2014-0196?

Upgrade affected software to a fixed version, for example Linux Kernel 3.12.20 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2014-0196 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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