Debian: Security Advisory (DSA-1020-1)

# SPDX-FileCopyrightText: 2008 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.56472");
  script_cve_id("CVE-2006-0459");
  script_tag(name:"creation_date", value:"2008-01-17 22:09:45 +0000 (Thu, 17 Jan 2008)");
  script_version("2024-02-01T14:37:10+0000");
  script_tag(name:"last_modification", value:"2024-02-01 14:37:10 +0000 (Thu, 01 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");

  script_name("Debian: Security Advisory (DSA-1020-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB3\.1");

  script_xref(name:"Advisory-ID", value:"DSA-1020-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2006/DSA-1020-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-1020");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'flex' package(s) announced via the DSA-1020-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"Chris Moore discovered that flex, a scanner generator, generates code, which allocates insufficient memory, if the grammar contains REJECT statements or trailing context rules. This may lead to a buffer overflow and the execution of arbitrary code.

If you use code, which is derived from a vulnerable lex grammar in an untrusted environment you need to regenerate your scanner with the fixed version of flex.

The old stable distribution (woody) is not affected by this problem.

For the stable distribution (sarge) this problem has been fixed in version 2.5.31-31sarge1.

For the unstable distribution (sid) this problem has been fixed in version 2.5.33-1.

We recommend that you upgrade your flex package.");

  script_tag(name:"affected", value:"'flex' package(s) on Debian 3.1.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "DEB3.1") {

  if(!isnull(res = isdpkgvuln(pkg:"flex", ver:"2.5.31-31sarge1", rls:"DEB3.1"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"flex-doc", ver:"2.5.31-31sarge1", rls:"DEB3.1"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);