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CVE-2023-52577

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dccp: fix dccp_v4_err()/dccp_v6_err() again dh->dccph_x is the 9th byte (offset 8) in "struct dccp_hdr", not in the "byte 7" as…

Published Mar 2, 2024CWE-908EPSS 0.23%

Overview

CVE-2023-52577 is a medium-severity vulnerability. It was published on March 2, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

dccp: fix dccp_v4_err()/dccp_v6_err() again

dh->dccph_x is the 9th byte (offset 8) in "struct dccp_hdr",

not in the "byte 7" as Jann claimed.

We need to make sure the ICMP messages are big enough,

using more standard ways (no more assumptions).

syzbot reported:

BUG: KMSAN: uninit-value in pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]

BUG: KMSAN: uninit-value in pskb_may_pull include/linux/skbuff.h:2681 [inline]

BUG: KMSAN: uninit-value in dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94

pskb_may_pull_reason include/linux/skbuff.h:2667 [inline]

pskb_may_pull include/linux/skbuff.h:2681 [inline]

dccp_v6_err+0x426/0x1aa0 net/dccp/ipv6.c:94

icmpv6_notify+0x4c7/0x880 net/ipv6/icmp.c:867

icmpv6_rcv+0x19d5/0x30d0

ip6_protocol_deliver_rcu+0xda6/0x2a60 net/ipv6/ip6_input.c:438

ip6_input_finish net/ipv6/ip6_input.c:483 [inline]

NF_HOOK include/linux/netfilter.h:304 [inline]

ip6_input+0x15d/0x430 net/ipv6/ip6_input.c:4

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/1512d8f45d3c5d0b5baa00bd8e600492fa569f40Refgit.kernel.org/stable/c/26df9ab5de308caa1503d937533c56c35793018dRefgit.kernel.org/stable/c/4600beae416d754a3cedbb1ecea8181ec05073b6Refgit.kernel.org/stable/c/60d73c62e3e4464f375758b6f2459c13d46465b6Refgit.kernel.org/stable/c/62c218124fe58372e0e1f60d5b634d21c264b337Refgit.kernel.org/stable/c/6af289746a636f71f4c0535a9801774118486c7aRefgit.kernel.org/stable/c/73be49248a04746096339a48a33fa2f03bd85969Refgit.kernel.org/stable/c/a6f4d582e25d512c9b492670b6608436694357b3Refgit.kernel.org/stable/c/1512d8f45d3c5d0b5baa00bd8e600492fa569f40Refgit.kernel.org/stable/c/26df9ab5de308caa1503d937533c56c35793018d

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52577?

CVE-2023-52577 is a medium-severity vulnerability. It was published on March 2, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52577?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-52577?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-52577?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52577 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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