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Fencer Intel
low 2.1

CVE-2011-4623 json

Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4,…

published 2012-09-25 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4546

cvss
2.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4 allows local users to cause a denial of service (daemon hang) via a large file, which triggers a heap-based buffer overflow.

Patch / fix

  • rsyslog Debian 14, Debian 13, Debian 12 5.7.4-1

debian advisories DEBIAN-CVE-2011-4623

  • rsyslog RHEL 6 5.8.10-2.el6
  • rsyslog-relp RHEL 6 5.8.10-2.el6
  • rsyslog-snmp RHEL 6 5.8.10-2.el6
  • rsyslog-mysql RHEL 6 5.8.10-2.el6
  • rsyslog-pgsql RHEL 6 5.8.10-2.el6
  • rsyslog-gnutls RHEL 6 5.8.10-2.el6
  • rsyslog-gssapi RHEL 6 5.8.10-2.el6

red hat advisories RHSA-2012:0796

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-2011-4623 updated cvss 5.4

rsyslog: DoS due integer signedness error while extending rsyslog counted string buffer

  • Red Hat Enterprise Linux Desktop (v. 6) rsyslog 5.8.10-2.el6, rsyslog-relp 5.8.10-2.el6, rsyslog-gnutls 5.8.10-2.el6, rsyslog-gssapi 5.8.10-2.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) rsyslog 5.8.10-2.el6, rsyslog-snmp 5.8.10-2.el6, rsyslog-mysql 5.8.10-2.el6, rsyslog-pgsql 5.8.10-2.el6 Red Hat Enterprise Linux HPC Node (v. 6) rsyslog 5.8.10-2.el6, rsyslog-relp 5.8.10-2.el6, rsyslog-gnutls 5.8.10-2.el6, rsyslog-gssapi 5.8.10-2.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) rsyslog 5.8.10-2.el6, rsyslog-snmp 5.8.10-2.el6, rsyslog-mysql 5.8.10-2.el6, rsyslog-pgsql 5.8.10-2.el6 Red Hat Enterprise Linux Server (v. 6) rsyslog 5.8.10-2.el6, rsyslog-relp 5.8.10-2.el6, rsyslog-mysql 5.8.10-2.el6, rsyslog-pgsql 5.8.10-2.el6, rsyslog-gnutls 5.8.10-2.el6, rsyslog-gssapi 5.8.10-2.el6 Red Hat Enterprise Linux Server Optional (v. 6) rsyslog 5.8.10-2.el6, rsyslog-snmp 5.8.10-2.el6
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) rsyslog 5.8.10-2.el6, rsyslog-relp 5.8.10-2.el6, rsyslog-mysql 5.8.10-2.el6, rsyslog-pgsql 5.8.10-2.el6, rsyslog-gnutls 5.8.10-2.el6, rsyslog-gssapi 5.8.10-2.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) rsyslog 5.8.10-2.el6, rsyslog-snmp 5.8.10-2.el6
    fixed: vendor fix RHSA-2012:0796
  • Red Hat Enterprise Linux 5 rsyslog
    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

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Intel 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.