USN-4397-1: NSS vulnerabilities

Releases

• Ubuntu 20.04 LTS
• Ubuntu 19.10
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• nss - Network Security Service library

Details

It was discovered that NSS incorrectly handled the TLS State Machine. A
remote attacker could possibly use this issue to cause NSS to hang,
resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS
and Ubuntu 19.10. (CVE-2019-17023)

Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key
generation. A local attacker could possibly use this issue to perform a
timing attack and recover DSA keys. (CVE-2020-12399)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.04

• libnss3 - 2:3.49.1-1ubuntu1.1

Ubuntu 19.10

• libnss3 - 2:3.45-1ubuntu2.3

Ubuntu 18.04

• libnss3 - 2:3.35-2ubuntu2.8

Ubuntu 16.04

• libnss3 - 2:3.28.4-0ubuntu0.16.04.11

After a standard system update you need to reboot your computer to make
all the necessary changes.

References

• CVE-2019-17023
• CVE-2020-12399

Related notices

• USN-4234-1: firefox-locale-sk, firefox-locale-de, firefox-locale-hu, firefox-locale-en, firefox-locale-ms, firefox-locale-es, firefox-locale-an, firefox-locale-or, firefox-locale-ko, firefox-locale-ga, firefox-locale-ru, firefox-locale-ml, firefox-locale-sv, firefox-locale-ka, firefox-locale-fr, firefox-locale-ca, firefox-locale-af, firefox-locale-id, firefox-locale-sl, firefox-locale-mn, firefox-locale-bn, firefox-locale-cy, firefox-locale-mai, firefox-locale-gu, firefox-locale-uz, firefox-locale-zh-hans, firefox-locale-nn, firefox-dev, firefox-locale-kn, firefox-locale-ia, firefox-locale-he, firefox-locale-fi, firefox-locale-zh-hant, firefox-locale-kk, firefox-locale-eu, firefox-locale-zu, firefox-locale-ta, firefox-locale-nso, firefox-locale-da, firefox-locale-ku, firefox-locale-bs, firefox-locale-be, firefox-locale-tr, firefox-locale-as, firefox-locale-csb, firefox-locale-pt, firefox-locale-km, firefox-locale-el, firefox-locale-ro, firefox-locale-th, firefox-locale-it, firefox-locale-ja, firefox-locale-hsb, firefox-locale-oc, firefox-locale-az, firefox-locale-sq, firefox-locale-sr, firefox-locale-ar, firefox-locale-nb, firefox-locale-pa, firefox-mozsymbols, firefox-locale-br, firefox-locale-fy, firefox-locale-sw, firefox-locale-gd, firefox-locale-hy, firefox-locale-cak, firefox-locale-vi, firefox-locale-mr, firefox-locale-lv, firefox-locale-fa, firefox-locale-gn, firefox-locale-lg, firefox-locale-te, firefox-locale-ast, firefox-locale-nl, firefox-locale-hr, firefox-locale-mk, firefox-locale-hi, firefox-locale-et, firefox-locale-uk, firefox, firefox-locale-lt, firefox-locale-bg, firefox-locale-cs, firefox-locale-ne, firefox-locale-is, firefox-locale-kab, firefox-locale-eo, firefox-geckodriver, firefox-locale-xh, firefox-locale-ur, firefox-locale-my, firefox-locale-si, firefox-locale-gl, firefox-locale-pl
• USN-4383-1: firefox-locale-sk, firefox-locale-de, firefox-locale-hu, firefox-locale-en, firefox-locale-ms, firefox-locale-es, firefox-locale-an, firefox-locale-or, firefox-locale-ko, firefox-locale-ga, firefox-locale-ru, firefox-locale-ml, firefox-locale-sv, firefox-locale-ka, firefox-locale-fr, firefox-locale-ca, firefox-locale-af, firefox-locale-id, firefox-locale-sl, firefox-locale-mn, firefox-locale-bn, firefox-locale-cy, firefox-locale-mai, firefox-locale-gu, firefox-locale-uz, firefox-locale-zh-hans, firefox-locale-nn, firefox-dev, firefox-locale-kn, firefox-locale-ia, firefox-locale-he, firefox-locale-fi, firefox-locale-zh-hant, firefox-locale-kk, firefox-locale-eu, firefox-locale-zu, firefox-locale-ta, firefox-locale-nso, firefox-locale-da, firefox-locale-ku, firefox-locale-bs, firefox-locale-be, firefox-locale-tr, firefox-locale-as, firefox-locale-csb, firefox-locale-pt, firefox-locale-km, firefox-locale-el, firefox-locale-ro, firefox-locale-th, firefox-locale-it, firefox-locale-ja, firefox-locale-hsb, firefox-locale-oc, firefox-locale-az, firefox-locale-sq, firefox-locale-sr, firefox-locale-ar, firefox-locale-nb, firefox-locale-pa, firefox-mozsymbols, firefox-locale-br, firefox-locale-fy, firefox-locale-sw, firefox-locale-gd, firefox-locale-hy, firefox-locale-cak, firefox-locale-vi, firefox-locale-mr, firefox-locale-lv, firefox-locale-fa, firefox-locale-gn, firefox-locale-lg, firefox-locale-te, firefox-locale-ast, firefox-locale-nl, firefox-locale-hr, firefox-locale-mk, firefox-locale-hi, firefox-locale-et, firefox-locale-uk, firefox, firefox-locale-lt, firefox-locale-bg, firefox-locale-cs, firefox-locale-ne, firefox-locale-is, firefox-locale-kab, firefox-locale-eo, firefox-geckodriver, firefox-locale-xh, firefox-locale-ur, firefox-locale-my, firefox-locale-si, firefox-locale-gl, firefox-locale-pl
• USN-4421-1: thunderbird-locale-it, thunderbird-locale-nl, thunderbird-locale-tr, thunderbird-locale-bn, thunderbird-locale-zh-tw, thunderbird-locale-pl, thunderbird-locale-pt-pt, thunderbird-locale-id, thunderbird-locale-et, thunderbird-locale-bn-bd, thunderbird-locale-sq, thunderbird-locale-es, thunderbird-locale-ga, thunderbird-locale-ca, thunderbird-locale-de, thunderbird-locale-ar, xul-ext-gdata-provider, thunderbird-locale-si, thunderbird-locale-fr, thunderbird-locale-pa, thunderbird-locale-en-gb, thunderbird-gnome-support, thunderbird-locale-fi, thunderbird-locale-pa-in, thunderbird-locale-fy, thunderbird-locale-hu, thunderbird-locale-gl, thunderbird-locale-ta-lk, thunderbird-locale-ga-ie, thunderbird-locale-hy, thunderbird-locale-kk, thunderbird-locale-mk, thunderbird-locale-el, thunderbird-locale-ru, thunderbird-locale-dsb, thunderbird-locale-uk, thunderbird-locale-ta, thunderbird-locale-nb-no, thunderbird-locale-fy-nl, thunderbird-locale-nb, thunderbird-locale-zh-hant, thunderbird-locale-zh-hans, thunderbird-locale-sk, thunderbird-locale-ms, thunderbird-locale-pt-br, thunderbird-locale-cak, thunderbird-locale-sl, xul-ext-lightning, thunderbird-locale-nn-no, thunderbird-locale-en, thunderbird-locale-kab, thunderbird-locale-ja, thunderbird-locale-sv, thunderbird-mozsymbols, xul-ext-calendar-timezones, thunderbird-locale-es-ar, thunderbird-locale-gd, thunderbird-locale-hsb, thunderbird-locale-pt, thunderbird-locale-en-us, thunderbird-locale-eu, thunderbird-locale-nn, thunderbird-locale-sr, thunderbird-locale-sv-se, thunderbird-locale-ast, thunderbird-locale-cy, thunderbird-locale-hr, thunderbird-locale-es-es, thunderbird-locale-lt, thunderbird-locale-br, thunderbird-locale-zh-cn, thunderbird-locale-ro, thunderbird-locale-af, thunderbird-dev, thunderbird-locale-be, thunderbird-locale-bg, thunderbird-locale-ka, thunderbird-locale-he, thunderbird-locale-ko, thunderbird-locale-rm, thunderbird-locale-vi, thunderbird-locale-cs, thunderbird-locale-da, thunderbird-locale-uz, thunderbird, thunderbird-locale-is
• USN-4397-2: libnss3-1d, libnss3-nssdb, nss, libnss3-dev, libnss3-tools, libnss3