USN-5168-3: NSS vulnerability
1 December 2021
NSS could be made to crash or run programs if it verified a specially crafted signature.
Releases
Packages
- nss - Network Security Service library
Details
USN-5168-1 fixed a vulnerability in NSS. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
Tavis Ormandy discovered that NSS incorrectly handled verifying DSA/RSA-PSS
signatures. A remote attacker could use this issue to cause NSS to crash,
resulting in a denial of service, or possibly execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
libnss3
-
2:3.28.4-0ubuntu0.16.04.14+esm1
Available with Ubuntu Pro
Ubuntu 14.04
-
libnss3
-
2:3.28.4-0ubuntu0.14.04.5+esm9
Available with Ubuntu Pro
After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.
References
Related notices
- USN-5168-1: libnss3-dev, nss, libnss3, libnss3-tools
- USN-5168-2: thunderbird-locale-bn, thunderbird-locale-nn-no, thunderbird-locale-pt, thunderbird-locale-af, thunderbird-locale-sl, thunderbird-locale-ar, thunderbird-locale-ta, thunderbird-locale-kk, thunderbird-locale-es, thunderbird-locale-ru, thunderbird-locale-pa, thunderbird-locale-sq, thunderbird-locale-et, thunderbird-locale-fy-nl, thunderbird-locale-hr, thunderbird-locale-fa, thunderbird-locale-cs, thunderbird-locale-eu, thunderbird-locale-he, thunderbird-locale-be, thunderbird-locale-ga, thunderbird-locale-ast, xul-ext-gdata-provider, thunderbird-locale-lt, thunderbird-locale-pt-pt, thunderbird-locale-cy, thunderbird, thunderbird-locale-it, thunderbird-locale-zh-tw, thunderbird-locale-nb, thunderbird-locale-nb-no, thunderbird-locale-gd, thunderbird-locale-vi, thunderbird-locale-ga-ie, thunderbird-locale-mk, thunderbird-locale-hy, thunderbird-locale-bg, xul-ext-calendar-timezones, thunderbird-locale-ro, thunderbird-locale-uk, thunderbird-locale-nl, thunderbird-locale-dsb, thunderbird-locale-es-ar, thunderbird-locale-sv-se, thunderbird-locale-th, thunderbird-locale-gl, thunderbird-locale-pa-in, thunderbird-dev, thunderbird-locale-es-es, thunderbird-locale-zh-cn, thunderbird-locale-is, thunderbird-locale-ja, thunderbird-locale-fr, thunderbird-locale-hsb, thunderbird-locale-el, thunderbird-locale-en-us, thunderbird-locale-tr, thunderbird-locale-uz, xul-ext-lightning, thunderbird-mozsymbols, thunderbird-locale-id, thunderbird-locale-da, thunderbird-locale-hu, thunderbird-locale-cak, thunderbird-locale-ta-lk, thunderbird-locale-zh-hans, thunderbird-locale-sk, thunderbird-locale-zh-hant, thunderbird-locale-fy, thunderbird-locale-en-gb, thunderbird-locale-ko, thunderbird-locale-pt-br, thunderbird-locale-kab, thunderbird-locale-en, thunderbird-locale-ms, thunderbird-locale-de, thunderbird-locale-fi, thunderbird-locale-nn, thunderbird-locale-ca, thunderbird-locale-si, thunderbird-locale-bn-bd, thunderbird-locale-sv, thunderbird-locale-pl, thunderbird-locale-br, thunderbird-locale-ka, thunderbird-locale-rm, thunderbird-gnome-support, thunderbird-locale-lv, thunderbird-locale-sr
- USN-5168-4: libnss3-dev, libnss3-tools, libnss3-1d, nss, libnss3, libnss3-nssdb