CVE-2009-1255

Exp

The process_stat function in (1) Memcached before 1.2.8 and (2) MemcacheDB 1.2.0 discloses (a) the contents of /proc/self/maps in response to a stats maps command and (b) memory-allocation statistics in response to a stats malloc command, which allows remote attackers to obtain sensitive information such as the locations of memory regions, and defeat ASLR protection, by sending a command to the daemon's TCP port.

Published: 2009-04-30 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-1255 is rated High Exploit Risk (63.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.25%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-1255

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-1255

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.08% 2.25% +0.17%
2 2025-03-30 4.81% 2.08% -2.74%
3 2025-03-29 — 4.81% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-1255

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-1255

OS Trackers for CVE-2009-1255

vendor priority summary link
debian low CVE-2009-1255 low priority: Debian including 1 source packages (memcached), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-1255
redhat high — https://access.redhat.com/security/cve/CVE-2009-1255
ubuntu medium CVE-2009-1255 medium priority: Ubuntu including 2 source packages (memcached, memcachedb), 20 status rows across 10 suites (dapper, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, upstream): not-affected 10, ignored 5, DNE 3, released 2. https://ubuntu.com/security/CVE-2009-1255

Affected software / configurations for CVE-2009-1255

Vendor Product Version Raw CPE
memcachedb memcached <= 1.2.0 cpe:2.3:a:memcachedb:memcached:*:*:*:*:*:*:*:*
memcachedb memcached 0.0.1 cpe:2.3:a:memcachedb:memcached:0.0.1:*:*:*:*:*:*:*
memcachedb memcached 0.0.2 cpe:2.3:a:memcachedb:memcached:0.0.2:*:*:*:*:*:*:*
memcachedb memcached 0.0.3 cpe:2.3:a:memcachedb:memcached:0.0.3:*:*:*:*:*:*:*
memcachedb memcached 0.0.4 cpe:2.3:a:memcachedb:memcached:0.0.4:*:*:*:*:*:*:*
memcachedb memcached 0.1.0 cpe:2.3:a:memcachedb:memcached:0.1.0:*:*:*:*:*:*:*
memcachedb memcached 0.1.1 cpe:2.3:a:memcachedb:memcached:0.1.1:*:*:*:*:*:*:*
memcachedb memcached 1.0.0 cpe:2.3:a:memcachedb:memcached:1.0.0:beta:*:*:*:*:*:*
memcachedb memcached 1.0.1 cpe:2.3:a:memcachedb:memcached:1.0.1:beta:*:*:*:*:*:*
memcachedb memcached 1.0.2 cpe:2.3:a:memcachedb:memcached:1.0.2:beta:*:*:*:*:*:*
memcachedb memcached 1.0.3 cpe:2.3:a:memcachedb:memcached:1.0.3:*:*:*:*:*:*:*
memcachedb memcached 1.0.4 cpe:2.3:a:memcachedb:memcached:1.0.4:*:*:*:*:*:*:*
memcachedb memcached 1.1.0 cpe:2.3:a:memcachedb:memcached:1.1.0:beta:*:*:*:*:*:*
memcachedb memcached 1.2.0 cpe:2.3:a:memcachedb:memcached:1.2.0:beta:*:*:*:*:*:*
memcachedb memcached 1.2.1 cpe:2.3:a:memcachedb:memcached:1.2.1:beta:*:*:*:*:*:*

References for CVE-2009-1255

URL Tags
http://archives.neohapsis.com/archives/fulldisclosure/2009-04/0282.html
http://code.google.com/p/memcachedb/source/browse/trunk/ChangeLog?spec=svn98&r=98
http://code.google.com/p/memcachedb/source/detail?r=98
http://code.google.com/p/memcachedb/source/diff?spec=svn98&r=98&format=side&path=/trunk/memcachedb.c Exploit Patch
http://groups.google.com/group/memcached/browse_thread/thread/ff96a9b88fb5d40e
http://osvdb.org/54127
http://secunia.com/advisories/34915 Vendor Advisory
http://secunia.com/advisories/34932 Vendor Advisory
http://secunia.com/advisories/35175
http://www.mandriva.com/security/advisories?name=MDVSA-2009:105
http://www.positronsecurity.com/advisories/2009-001.html Exploit
http://www.securityfocus.com/archive/1/503064/100/0/threaded
http://www.securityfocus.com/bid/34756
http://www.securitytracker.com/id?1022140
http://www.vupen.com/english/advisories/2009/1196 Vendor Advisory
http://www.vupen.com/english/advisories/2009/1197 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/50221
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg00851.html
https://www.redhat.com/archives/fedora-package-announce/2009-May/msg01256.html
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