CVE-2019-11745

high-risk
Published 2020-01-08

When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Do I need to act?

-
0.81% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (17)

Affected Vendors

Debian Redhat Siemens Mozilla Canonical Opensuse

References (34)

Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
Issue Tracking http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html
Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0243
Third Party Advisory https://access.redhat.com/errata/RHSA-2020:0466
Issue Tracking https://bugzilla.mozilla.org/show_bug.cgi?id=1586176
Third Party Advisory https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf
Mailing List https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html
Third Party Advisory https://security.gentoo.org/glsa/202003-02
Third Party Advisory https://security.gentoo.org/glsa/202003-10
Third Party Advisory https://security.gentoo.org/glsa/202003-37
Third Party Advisory https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04
Third Party Advisory https://usn.ubuntu.com/4241-1/
Third Party Advisory https://usn.ubuntu.com/4335-1/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-36/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-37/
Vendor Advisory https://www.mozilla.org/security/advisories/mfsa2019-38/
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
Issue Tracking http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
Mailing List http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00006.html
and 14 more references
52
/ 100
high-risk
Severity 30/34 · Critical
Exploitability 3/34 · Minimal
Exposure 19/34 · Moderate