DB_LOOKUP in nss_files/files-XXX.c in the Name Service Switch (NSS) in GNU C Library (aka glibc or libc6) 2.21 and earlier does not properly check if a file is open, which allows remote attackers to cause a denial of service (infinite loop) by performing a look-up on a database while iterating over it, which triggers the file pointer to be reset.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade glibcUpgrade eglibc | Feb 17, 2016 | Mar 27, 2015 |
| Gentoo Linux | — | Upgrade sys-libs/glibc. | Oct 30, 2017 | Mar 27, 2015 |
| Oracle_linux | — | Upgrade glibc-headersUpgrade glibc-utilsUpgrade nscdUpgrade glibc-commonUpgrade glibc-staticUpgrade glibc-develUpgrade glibc | Oct 16, 2024 | Mar 27, 2015 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 23, 2015 |
| Suse | — | Upgrade glibc-devel-staticUpgrade glibc-profileUpgrade glibc-localeUpgrade glibc-x86Upgrade glibc-locale-x86Upgrade glibc-profile-x86Upgrade glibc-develUpgrade glibc-i18ndataUpgrade glibc-32bitUpgrade glibc-locale-32bitUpgrade glibc-locale-baseUpgrade nscdUpgrade glibc-profile-32bitUpgrade glibcUpgrade glibc-htmlUpgrade glibc-locale-base-32bitUpgrade glibc-extraUpgrade glibc-langUpgrade glibc-infoUpgrade glibc-utilsUpgrade glibc-devel-32bit | Dec 18, 2015 | Mar 27, 2015 |
| Ubuntu | — | Upgrade libc6-devUpgrade libc6 | May 27, 2016 | Mar 27, 2015 |
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