CVE-2023-31137

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-31137
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-31137.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-31137
Aliases
  • GHSA-58m7-826v-9c3c
Downstream
Published
2023-05-09T13:56:46Z
Modified
2025-10-30T20:20:42.463823Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
MaraDNS Integer Underflow Vulnerability in DNS Packet Decompression
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-191"
    ]
}
References

Affected packages

Git / github.com/samboy/maradns

Affected ranges

Type
GIT
Repo
https://github.com/samboy/maradns
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
bab062bde40b2ae8a91eecd522e84d8b993bab58

Affected versions

2.*

2.0.12-RELEASE
2.0.13
2.0.16

Other

2016-05-05
2017-11-11
2018-04-11
2018-08-13
2018-08-17
2020-08-04
2020-08-05
2020-08-06

3.*

3.2.06
3.3.03
3.4.01
3.5.0001
3.5.0002
3.5.0003
3.5.0004
3.5.0005
3.5.0006
3.5.0007
3.5.0008
3.5.0009
3.5.0010
3.5.0011
3.5.0012
3.5.0013
3.5.0014
3.5.0015
3.5.0016
3.5.0017
3.5.0018
3.5.0019
3.5.0020
3.5.0021
3.5.0022
3.5.0023
3.5.0024
3.5.0025
3.5.0026
3.5.0027
3.5.0028
3.5.0029
3.5.0030
3.5.0031
3.5.0032
3.5.0033
3.5.0034
3.5.0035

coLunacyDNS-1.*

coLunacyDNS-1.0.002
coLunacyDNS-1.0.008
coLunacyDNS-1.0.009
coLunacyDNS-1.0.010
coLunacyDNS-1.0.012

deadwood-3.*

deadwood-3.2.10
deadwood-3.2.13
deadwood-3.3.01
deadwood-3.3.02

maradns-2.*

maradns-2.0.10
maradns-2.0.10a
maradns-2.0.11
maradns-2.0.14
maradns-2.0.17

Database specific

vanir_signatures

[
    {
        "id": "CVE-2023-31137-0ffcada4",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "89808788349867344767143701345458512602",
                "241827842363765108904724055662740013629",
                "255736606527912446993222367031908925422",
                "307303093863694106346912529890378534176",
                "52455824566973544570874473506454173645"
            ],
            "threshold": 0.9
        },
        "target": {
            "file": "dns/Decompress.c"
        },
        "source": "https://github.com/samboy/maradns/commit/bab062bde40b2ae8a91eecd522e84d8b993bab58"
    },
    {
        "id": "CVE-2023-31137-e85a946c",
        "deprecated": false,
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "23476427869030079362297228092599425269",
            "length": 1295.0
        },
        "target": {
            "file": "dns/Decompress.c",
            "function": "decomp_get_rddata"
        },
        "source": "https://github.com/samboy/maradns/commit/bab062bde40b2ae8a91eecd522e84d8b993bab58"
    }
]