High severity · published Aug 4, 2022
CVE-2022-31793
do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the…
7.5
CVSS
17.7%
EPSS
No
On KEV
Description
do_request in request.c in muhttpd before 1.1.7 allows remote attackers to read arbitrary files by constructing a URL with a single character before a desired path on the filesystem. This occurs because the code skips over the first character when serving files. Arris NVG443, NVG599, NVG589, and NVG510 devices and Arris-derived BGW210 and BGW320 devices are affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)17.7% · higher than 97% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BF
Bgw210 Firmware · Arris
All versions, or not specified · source: NVD
BF
Bgw320 Firmware · Arris
All versions, or not specified · source: NVD
MU
Muhttpd · Inglorion
before 1.1.7 · source: NVD
NF
Nvg443 Firmware · Arris
All versions, or not specified · source: NVD
NF
Nvg510 Firmware · Arris
All versions, or not specified · source: NVD
NF
Nvg589 Firmware · Arris
All versions, or not specified · source: NVD
NF
Nvg599 Firmware · Arris
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-31793
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-31793
Third Party Advisory
http://inglorion.net/software/muhttpd/
Third Party Advisory
https://blog.malwarebytes.com/exploits-and-vulnerabilities/2022/08/millions-of-arris-routers-are-vulnerable-to-path-traversal-attacks/
Exploit
https://derekabdine.com/blog/2022-arris-advisory
Third Party Advisory
https://kb.cert.org/vuls/id/495801
www.kb.cert.org
https://www.kb.cert.org/vuls/id/495801