CVE-2019-11719
When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the Network Security Services (NSS) library.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information disclosure. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 2.29% probability · 83th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 2.3% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
- https://access.redhat.com/errata/RHSA-2019:1951
- https://bugzilla.mozilla.org/show_bug.cgi?id=1540541Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
- https://security.gentoo.org/glsa/201908-12
- https://security.gentoo.org/glsa/201908-20
- https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html
- http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00010.html
- https://access.redhat.com/errata/RHSA-2019:1951
- https://bugzilla.mozilla.org/show_bug.cgi?id=1540541Issue Tracking, Permissions Required, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
- https://security.gentoo.org/glsa/201908-12
- https://security.gentoo.org/glsa/201908-20
- https://www.mozilla.org/security/advisories/mfsa2019-21/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-22/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2019-23/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.