Multiple vulnerabilities in OpenWrt/LEDE
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2020-7982 CVE-2020-7248 |
| CWE-ID | CWE-74 CWE-787 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
OpenWrt Operating systems & Components / Operating system LEDE Operating systems & Components / Operating system |
| Vendor | openwrt.org |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Improper Neutralization of Special Elements in Output Used by a Downstream Component
EUVDB-ID: #VU26370
Risk: High
CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]
CVE-ID: CVE-2020-7982
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists in the OPKG package manager due to the way it performs integrity checking of downloaded packages using the SHA-256 checksums embedded in the signed repository index. A remote attacker can perform a man-in-the-middle attack, inject arbitrary package payloads and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsOpenWrt: 18.06.0 - 19.07.0
LEDE: 17.01.0 - 17.01.7
CPE2.3- cpe:2.3:o:openwrt.org:openwrt:18.06.6:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt.org:openwrt:19.07.0:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt.org:linux embedded development environment:17.01.0:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt.org:linux embedded development environment:17.01.1:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt.org:linux embedded development environment:17.01.2:*:*:*:*:*:*:*
https://github.com/openwrt/openwrt/commits/master
https://openwrt.org/advisory/2020-01-31-1
https://thehackernews.com/2020/03/openwrt-rce-vulnerability.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheHackersNews+%28The+Hackers+News+-+Cyber+Security+Blog%29
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Out-of-bounds write
EUVDB-ID: #VU26371
Risk: High
CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID: CVE-2020-7248
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in libubox library. A remote attacker can provide a specially crafted binary blob or JSON input to "blobmsg_format_json", trigger out-of-bounds write and execute arbitrary code on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsOpenWrt: 18.06.0 - 19.07.0
CPE2.3- cpe:2.3:o:openwrt.org:openwrt:18.06.6:*:*:*:*:*:*:*
- cpe:2.3:o:openwrt.org:openwrt:19.07.0:*:*:*:*:*:*:*
https://github.com/openwrt/openwrt/commits/master
https://openwrt.org/advisory/2020-01-31-2
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
