CVE-2018-19591

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-12-04 · updated 2026-10-14
Weakness: CWE-20

Description

In the GNU C Library (aka glibc or libc6) through 2.28, attempting to resolve a crafted hostname via getaddrinfo() leads to the allocation of a socket descriptor that is not closed. This is related to the if_nametoindex() function.

Affected products

Fedoraproject Fedora: 28, 29
GNU C Library (glibc): through 2.28

References

http://www.securityfocus.com/bid/106037
http://www.securitytracker.com/id/1042174
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BO7WHN52GFMC5F2I2232GFIPSSXWFV7G/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/M52KE4YR3GNMHQUOS3DKAGZD5TQ5D5UH/
https://security.gentoo.org/glsa/201903-09
https://security.gentoo.org/glsa/201908-06
https://security.netapp.com/advisory/ntap-20190321-0003/
https://sourceware.org/bugzilla/show_bug.cgi?id=23927
https://sourceware.org/git/?p=glibc.git%3Ba=blob_plain%3Bf=NEWS%3Bhb=HEAD
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commitdiff%3Bh=d527c860f5a3f0ed687bd03f0cb464612dc23408
https://usn.ubuntu.com/4416-1/
http://www.securityfocus.com/bid/106037

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