Medium severity · published Nov 21, 2023
CVE-2023-6209
Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host
6.5
CVSS
1.4%
EPSS
No
On KEV
Description
Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FI
Firefox · Mozilla
before 120.0 · source: NVD
DL
Debian Linux · Debian
10.0; 11.0; 12.0 · source: NVD
FE
Firefox Esr · Mozilla
before 115.5.0 · source: NVD
TH
Thunderbird · Mozilla
before 115.5 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-6209
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-6209
Issue Tracking
https://bugzilla.mozilla.org/show_bug.cgi?id=1858570
Mailing List
https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
lists.debian.org
https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
Third Party Advisory
https://www.debian.org/security/2023/dsa-5561
Release Notes
https://www.mozilla.org/security/advisories/mfsa2023-49/
Release Notes
https://www.mozilla.org/security/advisories/mfsa2023-50/
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