Vulnerability · Published Jul 9, 2020 · Assigned by mozilla
CVE-2020-12399
Medium 4.4
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 51% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)4.4Medium
Exploit odds (30 days)0.7%top 48.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
NSS has shown timing differences when performing DSA signatures, which was exploitable and could eventually leak private keys. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.21 | firefox | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.22 | firefox | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.23 | firefox | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.20 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.21 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.22 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.23 | firefox-esr | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.21 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.22 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.23 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.24 | librewolf | 77.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.20 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.21 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.22 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Alpine:v3.23 | thunderbird | 68.9.0-r0 | ALPINE-CVE-2020-12399 |
| Debian:12 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12399 |
| Debian:13 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12399 |
| Debian:14 | firefox-esr | 68.9.0esr-1 | DEBIAN-CVE-2020-12399 |
| Debian:12 | nss | 2:3.53-1 | DEBIAN-CVE-2020-12399 |
| Debian:13 | nss | 2:3.53-1 | DEBIAN-CVE-2020-12399 |
| Debian:14 | nss | 2:3.53-1 | DEBIAN-CVE-2020-12399 |
| Debian:12 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12399 |
| Debian:13 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12399 |
| Debian:14 | thunderbird | 1:68.9.0-1 | DEBIAN-CVE-2020-12399 |
| Rocky Linux:8 | nspr | 0:4.25.0-2.el8_2 | RLSA-2020:3280 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Thunderbird | unspecified – before 68.9.0 |
| Mozilla | Firefox | unspecified – before 77 |
| Mozilla | Firefox ESR | unspecified – before 68.9 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-20/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-21/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-22/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1631576 x_refsource_MISC
- DSA-4726 vendor-advisory, x_refsource_DEBIAN
- USN-4421-1 vendor-advisory, x_refsource_UBUNTU
- GLSA-202007-49 vendor-advisory, x_refsource_GENTOO
- [debian-lts-announce] 20200929 [SECURITY] [DLA 2388-1] nss security update mailing-list, x_refsource_MLIST