CVE-2021-27253

CWE-122 — Heap-based Buffer Overflow CWE-787 — Out-of-bounds Write3 documents3 sources

Severity

8.8HIGH

EPSS

0.7%

top 27.09%

CISA KEV

Not in KEV

Exploit

No known exploits

Affected products

Netgear Br200 Firmware Netgear Br500 Firmware Netgear D7800 Firmware +41 more

Timeline

PublishedApr 14

Latest updateMay 24

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_bind.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverag…

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages44 packages

▶NVDnetgear/r7800_firmware< 1.0.2.80

▶CVEListV5netgear/r7800firmware version 1.0.2.76

▶NVDnetgear/br200_firmware< 5.10.0.5

▶NVDnetgear/br500_firmware< 5.10.0.5

▶NVDnetgear/d7800_firmware< 1.0.1.60

Patches

Patch: kb.netgear.com ↗Patch: kb.netgear.com ↗

🔴Vulnerability Details

GHSA

GHSA-xj23-fxfm-58rq: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800↗2022-05-24

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CVEList

CVE-2021-27253: This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800↗2021-04-14

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