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Fencer Vulns
critical 10.0

CVE-2008-6393 in the critical feed json

PSI Jabber client before 0.12.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a file…

published 2009-03-03 17 y ago modified 2026-06-16 4 mo ago also EUVD-2008-6363

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
18.3%
EPSS 18.3% chance of exploitation in 30 days, percentile 97%
public exploits
1
Exploit-DB

Summary

PSI Jabber client before 0.12.1 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a file transfer request with a negative value in a SOCKS5 option, which bypasses a signed integer check and triggers an integer overflow and a heap-based buffer overflow.

Patch / fix

  • psi Debian 13, Debian 12 0.12.1-1

debian advisories DEBIAN-CVE-2008-6393

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2008-6393 updated

psi: remote DoS vulnerability

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (EDB-7555)
  2. Published

Exploit prediction

18.34% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-7555 Psi Jabber Client (Windows / Linux) - Remote Denial of Service dos, 2008-12-23
  • bugs.gentoo.org http://bugs.gentoo.org/show_bug.cgi?id=252830 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/archive/1/499563 referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2009/02/25/5 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.