Kernel-memory disclosure via uninitialized IPv4 identifier
Published Nov 28, 2023 · Updated Aug 2, 2024
Improper initialization in Meta Katran before commit 6a03106ac1eab39d0303662963589ecb2374c97f allows remote attackers to read kernel memory. The create_v4_hdr and send_icmp4_too_big paths call bpf_xdp_adjust_head and then emit IPv4 headers without initializing the Identification field. Network traffic that reaches IPv4 encapsulation or ICMPv4 Packet Too Big generation can expose two bytes of prior kernel memory in the outgoing header.
Summary
What happened
Improper initialization in Meta Katran before commit 6a03106ac1eab39d0303662963589ecb2374c97f allows remote attackers to read kernel memory. The create_v4_hdr and send_icmp4_too_big paths call bpf_xdp_adjust_head and then emit IPv4 headers without initializing the Identification field. Network traffic that reaches IPv4 encapsulation or ICMPv4 Packet Too Big generation can expose two bytes of prior kernel memory in the outgoing header.
The record
- CVE
- CVE-2023-49062
- Published
- Nov 28, 2023
- Updated
- Aug 2, 2024
- Vendor
- Meta
- Product
- Katran
- Classifications
- CWE-665, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 28, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
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Is a vulnerable build present?
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- Affected versionversion=0 <6a03106ac1eab39d0303662963589ecb2374c97f
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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