cbcvebase.
CVE-2014-0098
published 2014-03-18

CVE-2014-0098: The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server before 2.4.8 allows remote attackers to cause a denial of…

PriorityP334medium5CVSS 2.0
AVNACLAuNCNINAP
EPSS
26.00%
97.8th percentile
The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server before 2.4.8 allows remote attackers to cause a denial of service (segmentation fault and daemon crash) via a crafted cookie that is not properly handled during truncation.

Affected

17 ranges
VendorProductVersion rangeFixed in
apachehttp_server>= 2.2.0 < 2.2.272.2.27
apachehttp_server>= 2.4.1 < 2.4.92.4.9
apachehttpd
appleos_x_yosemite_v10.10.3_and_security_update_2015-004
canonicalubuntu_linux
canonicalubuntu_linux
canonicalubuntu_linux
canonicalubuntu_linux
debianapache2< apache2 2.4.9-1 (bookworm)apache2 2.4.9-1 (bookworm)
oraclehttp_server
oraclehttp_server
oraclehttp_server
oraclehttp_server
oraclesecure_global_desktop
oraclesecure_global_desktop
oraclesecure_global_desktop
oraclesecure_global_desktop

Detection & IOCsextracted from sources · hover to see the quote

  • The vulnerability is triggered by a malformed/truncated Cookie header in an HTTP request. Detection should focus on anomalous Cookie headers sent to Apache httpd servers running mod_log_config with cookie logging enabled (e.g., %{Foobar}C LogFormat directive).
  • The crash only results in a denial of service when Apache is using a threaded MPM. Monitor for unexpected httpd child process crashes (segmentation faults) on servers using threaded MPMs with cookie logging configured.
  • Affected Apache httpd versions span 2.2.0–2.2.26 and 2.4.1–2.4.7. Identify unpatched instances (pre-2.4.8 / pre-2.2.27) with mod_log_config loaded and cookie logging active as high-priority targets.
  • ·Only Apache httpd instances explicitly configured to log cookie values (using %{CookieName}C in LogFormat) are vulnerable. Default Red Hat Enterprise Linux configurations do not enable cookie logging and are therefore not affected.
  • ·Cookie logging can be disabled as a mitigation. Removing %{...}C format specifiers from LogFormat directives prevents exploitation.

CVSS provenance

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv5.0MEDIUM
vendor_apache5.0LOW
vendor_debian5.0MEDIUM
vendor_redhat5.0MEDIUM
vendor_ubuntu5.0MEDIUM
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