MaraDNS 3.5.0024

CPE Details

MaraDNS 3.5.0024
maradns
maradns
3.5.0024
2022-11-28
09h24 +00:00
2022-11-28
10h34 +00:00
CPE NVD
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CPE Name: cpe:2.3:a:maradns:maradns:3.5.0024:*:*:*:*:*:*:*

Informations

Vendor

maradns

Product

maradns

Version

3.5.0024

Related CVE

Open and find in CVE List

CVE ID Published Description Score Severity
CVE-2023-31137 2023-05-09 13h56 +00:00 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.
7.5
High