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BIND Updates Patch Excessive-Severity Vulnerabilities

By Ionut Arghire on September 23, 2022

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The Web Methods Consortium (ISC) this week introduced the provision of patches for six vulnerabilities within the extensively deployed BIND DNS software program, all remotely exploitable.

Of the resolved safety flaws, 4 have a severity ranking of ‘excessive’. All 4 could possibly be exploited to trigger a denial-of-service (DoS) situation.

The primary of those is CVE-2022-2906, a reminiscence leak problem impacting “key processing when utilizing TKEY information in Diffie-Hellman mode with OpenSSL 3.0.Zero and later variations”, ISC explains in its advisory.

A distant attacker might exploit the bug to step by step erode out there reminiscence, resulting in a crash. As a result of the attacker might exploit the vulnerability once more after restart, “there may be the potential to disclaim service”, ISC says.

Tracked as CVE-2022-3080, the second flaw could lead to a crash of the BIND 9 resolver beneath sure situations, when crafted queries are despatched to the resolver.

CVE-2022-38177, ISC says, is a reminiscence leak problem within the DNSSEC verification code for the ECDSA algorithm, which could be triggered by a signature size mismatch.

“By spoofing the goal resolver with responses which have a malformed ECDSA signature, an attacker can set off a small reminiscence leak. It’s potential to step by step erode out there reminiscence to the purpose the place named crashes for lack of sources,” ISC explains.

The fourth high-severity bug addressed in BIND 9 is CVE-2022-38178, a reminiscence leak impacting the DNSSEC verification code for the EdDSA algorithm, which could be triggered with malformed ECDSA signatures.

Updates have been launched for BIND 9.18 (secure department), BIND 9.19 (growth model), and BIND 9.16 (Prolonged Help Model).

ISC says it’s not conscious of any public exploits concentrating on these vulnerabilities.

On Thursday, the US Cybersecurity and Infrastructure Safety Company (CISA) inspired customers and directors to assessment ISC’s advisories for these 4 safety holes and to use the out there patches as quickly as potential.

Associated: Excessive-Severity Vulnerabilities Patched in BIND Server

Associated: BIND Vulnerabilities Expose DNS Servers to Distant Assaults

Associated: Flaw in BIND Safety Function Permits DoS Assaults

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