Improper input validation in Realtek Ecos Msdk
CVE-2022-27255
In Realtek eCos RSDK 1.5.7p1 and MSDK 4.9.4p1, the SIP ALG function that rewrites SDP data has a stack-based buffer overflow. This allows an attacker to remotely execute code without authentication via a crafted SIP packet that contains malicious SDP data.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.371 (98.5th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.371 · newest: 0.371 · change: 0.000
Affected products
- Realtek Ecos Msdk
- Realtek Ecos Msdk Firmware — versions 4.9.4p1
- Realtek Ecos Rsdk
- Realtek Ecos Rsdk Firmware — versions 1.5.7p1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2022-27255… (Vendor Advisory)
- forum.defcon.org/node/241835 (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-27255?
- CVE-2022-27255 is a critical-severity vulnerability in Realtek Ecos Msdk, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2022-08-01.
- How severe is CVE-2022-27255?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2022-27255 known to be exploited?
- 30 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.