Description
The pduread function in pdu.c in libpcp in Performance Co-Pilot (PCP) before 3.6.5 does not properly time out connections, which allows remote attackers to cause a denial of service (pmcd hang) by sending individual bytes of a PDU separately, related to an "event-driven programming flaw."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pcp | 3.6.5 | — |
| Debian 13 | pcp | 3.6.5 | — |
| Debian 12 | pcp | 3.6.5 | — |
| Debian 6.0 | pcp | 3.3.3-squeeze2 | DSA-2533-1 |
Advisories 1
- DSA-2533-1 pcp - several Debian Security (DSA / DLA) · Mar 9, 2026
References
- http://oss.sgi.com/cgi-bin/gitweb.cgi?p=pcp/pcp.git%3Ba=blob%3Bf=CHANGELOG%3Bh=16c9cbb2f61d909487ea1c3171f4ab33e5648ac5%3Bhb=fe51067ae869a4d59f350ac319b09edcb77ac8e6
- openSUSE-SU-2012:1079 vendor-advisory
- openSUSE-SU-2012:1081 vendor-advisory
- [oss-security] 20120816 pcp: Multiple security flaws mailing-list
- http://oss.sgi.com/cgi-bin/gitweb.cgi?p=pcp/pcp.git%3Ba=commit%3Bh=9ba85dca940de976176ce196fd5e3c4170936354
- FEDORA-2012-12076 vendor-advisory
- openSUSE-SU-2012:1036 vendor-advisory
- FEDORA-2012-12024 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=841706
- SUSE-SU-2013:0190 vendor-advisory
- DSA-2533 vendor-advisory