Lucene search

GitHub_MCVE-2023-31137

HistoryMay 09, 2023 - 2:15 p.m.

CVE-2023-31137

2023-05-0914:15:13

CWE-191

GitHub_M

web.nvd.nist.gov

maradns

dns

vulnerability

cve-2023-31137

security

patch

nvd

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.001

Percentile

51.4%

JSON

MaraDNS is open-source software that implements the Domain Name System (DNS). In version 3.5.0024 and prior, a remotely exploitable integer underflow vulnerability in the DNS packet decompression function allows an attacker to cause a Denial of Service by triggering an abnormal program termination.

The vulnerability exists in the decomp_get_rddata function within the Decompress.c file. When handling a DNS packet with an Answer RR of qtype 16 (TXT record) and any qclass, if the rdlength is smaller than rdata, the result of the line Decompress.c:886 is a negative number len = rdlength - total;. This value is then passed to the decomp_append_bytes function without proper validation, causing the program to attempt to allocate a massive chunk of memory that is impossible to allocate. Consequently, the program exits with an error code of 64, causing a Denial of Service.

One proposed fix for this vulnerability is to patch Decompress.c:887 by breaking if(len <= 0), which has been incorporated in version 3.5.0036 via commit bab062bde40b2ae8a91eecd522e84d8b993bab58.

Affected configurations

Nvd

Vulners

Node

maradnsmaradnsRange<3.4.10

maradnsmaradnsRange3.5.0001–3.5.0036

Node

fedoraprojectfedoraMatch37

fedoraprojectfedoraMatch38

Node

debiandebian_linuxMatch10.0

debiandebian_linuxMatch11.0

VendorProductVersionCPE
maradnsmaradns*cpe:2.3:a:maradns:maradns:*:*:*:*:*:*:*:*
fedoraprojectfedora37cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraprojectfedora38cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
debiandebian_linux10.0cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debiandebian_linux11.0cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
maradns	maradns	*	cpe:2.3:a:maradns:maradns::::::::
fedoraproject	fedora	37	cpe:2.3:o:fedoraproject:fedora:37:::::::*
fedoraproject	fedora	38	cpe:2.3:o:fedoraproject:fedora:38:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

CNA Affected

[
  {
    "vendor": "samboy",
    "product": "MaraDNS",
    "versions": [
      {
        "version": "<= 3.5.0024",
        "status": "affected"
      }
    ]
  }
]