Vulnerability · Published Aug 10, 2020 · Assigned by mozilla
CVE-2020-15658
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 1.4% (higher than 72% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.5Medium
Exploit odds (30 days)1.4%top 27.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
The code for downloading files did not properly take care of special characters, which led to an attacker being able to cut off the file ending at an earlier position, leading to a different file type being downloaded than shown in the dialog. 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-2020-15658 |
| Alpine:v3.21 | firefox | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.22 | firefox | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.23 | firefox | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.20 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.21 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.22 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.23 | firefox-esr | 78.1.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.21 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.22 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.23 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15658 |
| Alpine:v3.24 | librewolf | 79.0-r0 | ALPINE-CVE-2020-15658 |
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=1637745 x_refsource_MISC
- openSUSE-SU-2020:1189 vendor-advisory, x_refsource_SUSE
- USN-4443-1 vendor-advisory, x_refsource_UBUNTU