| Name | CVE-2023-23916 |
| Description | An allocation of resources without limits or throttling vulnerability exists in curl <v7.88.0 based on the "chained" HTTP compression algorithms, meaning that a server response can be compressed multiple times and potentially with differentalgorithms. The number of acceptable "links" in this "decompression chain" wascapped, but the cap was implemented on a per-header basis allowing a maliciousserver to insert a virtually unlimited number of compression steps simply byusing many headers. The use of such a decompression chain could result in a "malloc bomb", making curl end up spending enormous amounts of allocated heap memory, or trying to and returning out of memory errors. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3341-1, DSA-5365-1 |
| Debian Bugs | 1031371 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| curl (PTS) | jessie, jessie (lts) | 7.38.0-4+deb8u28 | fixed |
| stretch (security) | 7.52.1-5+deb9u16 | fixed | |
| stretch (lts), stretch | 7.52.1-5+deb9u22 | fixed | |
| buster, buster (lts) | 7.64.0-4+deb10u10 | fixed | |
| buster (security) | 7.64.0-4+deb10u9 | fixed | |
| bullseye | 7.74.0-1.3+deb11u13 | fixed | |
| bullseye (security) | 7.74.0-1.3+deb11u14 | fixed | |
| bookworm | 7.88.1-10+deb12u8 | fixed | |
| bookworm (security) | 7.88.1-10+deb12u5 | fixed | |
| sid, trixie | 8.11.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| curl | source | jessie | (not affected) | |||
| curl | source | stretch | (not affected) | |||
| curl | source | buster | 7.64.0-4+deb10u5 | DLA-3341-1 | ||
| curl | source | bullseye | 7.74.0-1.3+deb11u7 | DSA-5365-1 | ||
| curl | source | (unstable) | 7.88.1-1 | 1031371 |
https://curl.se/docs/CVE-2023-23916.html
Introduced by: https://github.com/curl/curl/commit/dbcced8e32b50c068ac297106f0502ee200a1ebd (curl-7_57_0)
Fixed by: https://github.com/curl/curl/commit/119fb187192a9ea13dc90d9d20c215fc82799ab9 (curl-7_88_0)
[stretch] - curl <not-affected> (Vulnerable code introduced later)
[jessie] - curl <not-affected> (Vulnerable code introduced later)