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| author | Florian Weimer <fweimer@redhat.com> | 2023-09-13 14:10:56 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2023-09-13 14:10:56 +0200 |
| commit | bd77dd7e73e3530203be1c52c8a29d08270cb25d (patch) | |
| tree | b5d84f536d6c48f6ca85b61b42231fe01fc4384a /NEWS | |
| parent | c8fa383f4cec9cf1c0cc8ec97903c09af10286f4 (diff) | |
| download | glibc-bd77dd7e73e3530203be1c52c8a29d08270cb25d.zip glibc-bd77dd7e73e3530203be1c52c8a29d08270cb25d.tar.gz glibc-bd77dd7e73e3530203be1c52c8a29d08270cb25d.tar.bz2 | |
CVE-2023-4527: Stack read overflow with large TCP responses in no-aaaa mode
Without passing alt_dns_packet_buffer, __res_context_search can only
store 2048 bytes (what fits into dns_packet_buffer). However,
the function returns the total packet size, and the subsequent
DNS parsing code in _nss_dns_gethostbyname4_r reads beyond the end
of the stack-allocated buffer.
Fixes commit f282cdbe7f436c75864e5640a4 ("resolv: Implement no-aaaa
stub resolver option") and bug 30842.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -42,7 +42,11 @@ Changes to build and runtime requirements: Security related changes: - [Add security related changes here] + CVE-2023-4527: If the system is configured in no-aaaa mode via + /etc/resolv.conf, getaddrinfo is called for the AF_UNSPEC address + family, and a DNS response is received over TCP that is larger than + 2048 bytes, getaddrinfo may potentially disclose stack contents via + the returned address data, or crash. The following bugs are resolved with this release: |