What is CVE-2020-27853?

CVE-2020-27853 is a critical-severity vulnerability in Wire, classified under Use of Externally-Controlled Format String. CVSS score: 9.8/10. Published 2020-10-27.

How severe is CVE-2020-27853?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Wire

CVE-2020-27853

Wire before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a format string. This affects Wire AVS (Audio, Video, and Signaling) 5.3 through 6.x before 6.4, the Wire Secure Messenger application before 3.49.918 for Android, and the Wire Secure Messenger application before 3.61 for iOS. This occurs via the value parameter to sdp_media_set_lattr in peerflow/sdp.c.

EPSS: 0.039 (89.3th percentile) — read the EPSS interpretation.

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.

Affected products

Wire
Wire Wire_-_audio\,_video\,_and_signaling
Wire Wire_secure_messenger
N/a — versions n/a

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-27853?: CVE-2020-27853 is a critical-severity vulnerability in Wire, classified under Use of Externally-Controlled Format String. CVSS score: 9.8/10. Published 2020-10-27.
How severe is CVE-2020-27853?: Critical severity. CVSS v3 base score is 9.8 out of 10.