CVE-2020-27853

CRITICAL

9.8

CVSS Score

Published: October 27, 2020 at 05:53 PM UTC

Updated: June 17, 2026 at 03:09 AM UTC

3 products affected across 1 vendorWireWire Audio , Video , and SignalingWire Secure Messenger

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Severity

CRITICAL9.8

Exploit prediction

EPSS 4%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Wire · Wire

95%

v < 3.21.2936v < 3.21.3932v < 3.21.3959

Affected range stops below 3.21.2936, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.21.3932, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.21.3959, so it looks safe — our inference, not a vendor statement

Wire Audio , Video , and Signaling · Wire

95%

5.3 ≤ v < 6.4

Affected range stops below 6.4, so it looks safe — our inference, not a vendor statement

Wire Secure Messenger · Wire

95%

v < 3.49.918v < 3.61

Affected range stops below 3.49.918, so it looks safe — our inference, not a vendor statement

Affected range stops below 3.61, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

http://github.security.telekom.com/2020/11/wire-secure-messenger-format-string-vulnerability.html

x_refsource_MISCExploitThird Party Advisory

Source: [email protected]

https://github.com/wireapp/wire-audio-video-signaling/issues/23#issuecomment-710075689

CVSS

9.8CRITICAL[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-134

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