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Fencer Vulns
medium 6.5

CVE-2023-27478 json

Disclosure of unrelated data in libmemcached-awesome

published 2023-03-07 3 y ago modified 2026-09-08 2 mo ago also BIT-libmemcached-2023-27478 , BIT-memcached-2023-27478 , EUVD-2023-31250 , GHSA-wwmh-39wj-fx59

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 55%
public exploits
0
none known

Summary

libmemcached-awesome is an open source C/C++ client library and tools for the memcached server. `libmemcached` could return data for a previously requested key, if that previous request timed out due to a low `POLL_TIMEOUT`. This issue has been addressed in version 1.1.4. Users are advised to upgrade. There are several ways to workaround or lower the probability of this bug affecting a given deployment. 1: use a reasonably high `POLL_TIMEOUT` setting, like the default. 2: use separate libmemcached connections for unrelated data. 3: do not re-use libmemcached connections in an unknown state.

Patch / fix

  • bitnami libmemcached 1.1.4
  • bitnami memcached 1.1.4
  • awesome libmemcached 1.1.4
  • libmemcached Debian 14, Debian 13, Debian 12 1.1.4-1

debian advisories DEBIAN-CVE-2023-27478

  • libmemcached-awesome CBL-Mariner 2.0, Azure Linux 3.0 1.1.4-1

azure linux advisories AZL-25584AZL-34932

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2023-27478 updated cvss 6.5

libmemcached: Disclosure of unrelated data

  • Red Hat Enterprise Linux 6 libmemcached Red Hat Enterprise Linux 7 libmemcached Red Hat Enterprise Linux 8 libmemcached, libmemcached-libs
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/php-memcached-dev/php-memcached/issues/531 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
bitnami libmemcached
>=1.0.18, <1.1.4
1.1.4
bitnami memcached
>=1.0.18, <1.1.4
1.1.4

Affected products

  • awesomized libmemcached

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

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.