Huawei EulerOS: Security Advisory for yajl (EulerOS-SA-2022-2542)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.2.2022.2542");
  script_cve_id("CVE-2022-24795");
  script_tag(name:"creation_date", value:"2022-10-10 07:55:28 +0000 (Mon, 10 Oct 2022)");
  script_version("2024-02-05T14:36:57+0000");
  script_tag(name:"last_modification", value:"2024-02-05 14:36:57 +0000 (Mon, 05 Feb 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-04-18 10:05:33 +0000 (Mon, 18 Apr 2022)");

  script_name("Huawei EulerOS: Security Advisory for yajl (EulerOS-SA-2022-2542)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Huawei EulerOS Local Security Checks");
  script_dependencies("gb_huawei_euleros_consolidation.nasl");
  script_mandatory_keys("ssh/login/euleros", "ssh/login/rpms", re:"ssh/login/release=EULEROSVIRT\-3\.0\.6\.6");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2022-2542");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2022-2542");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'yajl' package(s) announced via the EulerOS-SA-2022-2542 advisory.");

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

  script_tag(name:"insight", value:"yajl-ruby is a C binding to the YAJL JSON parsing and generation library.The 1.x branch and the 2.x branch of `yajl` contain an integer overflow which leads to subsequent heap memory corruption when dealing with large (~2GB) inputs.The reallocation logic at `yajl_buf.c#L64` may result in the `need` 32bit integer wrapping to 0 when `need` approaches a value of 0x80000000 (i.e.~2GB of data), which results in a reallocation of buf->alloc into a small heap chunk.These integers are declared as `size_t` in the 2.x branch of `yajl`, which practically prevents the issue from triggering on 64bit platforms, however this does not preclude this issue triggering on 32bit builds on which `size_t` is a 32bit integer.Subsequent population of this under-allocated heap chunk is based on the original buffer size, leading to heap memory corruption.This vulnerability mostly impacts process availability.Maintainers believe exploitation for arbitrary code execution is unlikely.A patch is available and anticipated to be part of yajl-ruby version 1.4.2.As a workaround, avoid passing large inputs to YAJL.(CVE-2022-24795)");

  script_tag(name:"affected", value:"'yajl' package(s) on Huawei EulerOS Virtualization 3.0.6.6.");

  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-rpm.inc");

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

res = "";
report = "";

if(release == "EULEROSVIRT-3.0.6.6") {

  if(!isnull(res = isrpmvuln(pkg:"yajl", rpm:"yajl~2.0.4~4.h2.eulerosv2r7", rls:"EULEROSVIRT-3.0.6.6"))) {
    report += res;
  }

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

exit(0);