Is CVE-2016-2090 being actively exploited?

It is not currently in CISA's KEV catalog. Its EPSS exploitation probability is 3%.

What products does CVE-2016-2090 affect?

Tracked products affected include Ubuntu, Debian, Fedora. Check the version you run to see whether it is affected.

How do I fix CVE-2016-2090?

Apply the vendor fix promptly. An official patch or advisory is available. Upgrade affected products to a fixed version.

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CVE-2016-2090

Q: What is CVE-2016-2090?

CVE-2016-2090 is a critical-severity software vulnerability (Memory corruption) with a CVSS score of 9.8. Off-by-one vulnerability in the fgetwln function in libbsd before 0.8.2 allows attackers to have unspecified impact via unknown vectors, which trigger a heap-based buffer overflow.

CRITICAL severity · CVSS 9.8 · Memory corruption

9.8CVSS CRITICAL

Summary

Off-by-one vulnerability in the fgetwln function in libbsd before 0.8.2 allows attackers to have unspecified impact via unknown vectors, which trigger a heap-based buffer overflow.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactHigh

Integrity impactHigh

Availability impactHigh

Exploit probability (EPSS)3%

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

Affected products we track (3)

Ubuntu Debian Fedora

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

Official patch: https://cgit.freedesktop.org/libbsd/commit/?id=c8f0723d2b4520bdd6b9eb7c3e7976de726d7ff7 ↗

Additional information

NVD record
https://cgit.freedesktop.org/libbsd/commit/?id=c8f0723d2b4520bdd6b9eb7c3e7976de726d7ff7Patch
http://www.openwall.com/lists/oss-security/2016/01/28/5Advisory
https://blog.fuzzing-project.org/36-Heap-buffer-overflow-in-fgetwln-function-of-libbsd.htmlAdvisory
https://bugs.freedesktop.org/show_bug.cgi?id=93881Advisory
https://lists.debian.org/debian-lts-announce/2019/12/msg00036.htmlAdvisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7KJE5SPSX7HEKLZ34LUTZLXWPEL2K353/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DIQKQ42Z7553D46QY3IMIQKS52QTNIHY/
https://security.gentoo.org/glsa/201607-13Advisory