Based on the RPM metadata this appears to be a security kernel.
The RPM changelog shows fixes related to Security Fix(es) :
An integer overflow flaw was found in the way the Linux kernel’s networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel’s socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS). (CVE-2019-11477)
kernel: Double free in lib/idr.c (CVE-2019-3896)
Kernel: tcp: excessive resource consumption while processing SACK blocks allows remote denial of service (CVE-2019-11478)
Kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service (CVE-2019-11479)
Bug Fix(es) :
kernel memory leak in xenfs
dentry with DCACHE_SHRINKING set but no task shrinking dcache
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text is (C) Scientific Linux.
#
include('compat.inc');
if (description)
{
script_id(126763);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/06");
script_cve_id(
"CVE-2019-11477",
"CVE-2019-11478",
"CVE-2019-11479",
"CVE-2019-3896"
);
script_xref(name:"CEA-ID", value:"CEA-2019-0456");
script_name(english:"Scientific Linux Security Update : kernel on SL6.x i386/x86_64 (SACK Panic) (SACK Slowness)");
script_set_attribute(attribute:"synopsis", value:
"The remote Scientific Linux host is missing one or more security
updates.");
script_set_attribute(attribute:"description", value:
"Based on the RPM metadata this appears to be a security kernel.
The RPM changelog shows fixes related to Security Fix(es) :
- An integer overflow flaw was found in the way the Linux
kernel's networking subsystem processed TCP Selective
Acknowledgment (SACK) segments. While processing SACK
segments, the Linux kernel's socket buffer (SKB) data
structure becomes fragmented. Each fragment is about TCP
maximum segment size (MSS) bytes. To efficiently process
SACK blocks, the Linux kernel merges multiple fragmented
SKBs into one, potentially overflowing the variable
holding the number of segments. A remote attacker could
use this flaw to crash the Linux kernel by sending a
crafted sequence of SACK segments on a TCP connection
with small value of TCP MSS, resulting in a denial of
service (DoS). (CVE-2019-11477)
- kernel: Double free in lib/idr.c (CVE-2019-3896)
- Kernel: tcp: excessive resource consumption while
processing SACK blocks allows remote denial of service
(CVE-2019-11478)
- Kernel: tcp: excessive resource consumption for TCP
connections with low MSS allows remote denial of service
(CVE-2019-11479)
Bug Fix(es) :
- kernel memory leak in xenfs
- dentry with DCACHE_SHRINKING set but no task shrinking
dcache");
# https://listserv.fnal.gov/scripts/wa.exe?A2=ind1907&L=SCIENTIFIC-LINUX-ERRATA&P=3449
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f858720b");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_attribute(attribute:"in_the_news", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/06/19");
script_set_attribute(attribute:"patch_publication_date", value:"2019/06/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/07/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"x-cpe:/o:fermilab:scientific_linux");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Scientific Linux Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/RedHat/release", "Host/RedHat/rpm-list");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Scientific Linux " >!< release) audit(AUDIT_HOST_NOT, "running Scientific Linux");
if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu >!< "x86_64" && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Scientific Linux", cpu);
flag = 0;
if (rpm_check(release:"SL6", reference:"kernel-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-abi-whitelists-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-debug-devel-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-devel-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-doc-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", cpu:"x86_64", reference:"kernel-firmware-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"kernel-headers-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"perf-2.6.32-754.17.1.el6")) flag++;
if (rpm_check(release:"SL6", reference:"python-perf-2.6.32-754.17.1.el6")) flag++;
if (flag)
{
if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
else security_hole(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version |
---|---|---|
fermilab | scientific_linux |