Vulnerability · Published Aug 10, 2020 · Assigned by mozilla
CVE-2020-15655
Medium 6.5
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 1.5% (higher than 75% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.5%top 25.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | firefox | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.21 | firefox | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.22 | firefox | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.23 | firefox | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.20 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.21 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.22 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.23 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.21 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.22 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.23 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15655 |
| Alpine:v3.24 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15655 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 78.1 |
| Mozilla | Firefox | unspecified – before 79 |
| Mozilla | Thunderbird | unspecified – before 78.1 |
References
- https://www.mozilla.org/security/advisories/mfsa2020-30/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-32/ x_refsource_MISC
- https://www.mozilla.org/security/advisories/mfsa2020-33/ x_refsource_MISC
- https://bugzilla.mozilla.org/show_bug.cgi?id=1645204 x_refsource_MISC
- openSUSE-SU-2020:1189 vendor-advisory, x_refsource_SUSE
- USN-4443-1 vendor-advisory, x_refsource_UBUNTU