Description
Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by an attacker who can control the data that curl transmits over SMTP with certain settings (i.e., use of a nonstandard --limit-rate argument or CURLOPT_BUFFERSIZE value).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | curl before 7.61.0 | curl before 7.61.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | curl | 7.61.0-1 | — |
| Debian 13 | curl | 7.61.0-1 | — |
| Debian 12 | curl | 7.61.0-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | curl | 7.58.0-2ubuntu3.2 | USN-3710-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | curl | 7.60.0-3.6.4 | SUSE-SU-2018:2423-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | curl | 7.79.1-1.1 | openSUSE-SU-2024:10582-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | curl | 7.61.0-r0 | — |
| Alpine v3.23 | curl | 7.61.0-r0 | — |
| Alpine v3.22 | curl | 7.61.0-r0 | — |
| Alpine v3.21 | curl | 7.61.0-r0 | — |
| Alpine v3.20 | curl | 7.61.0-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | curl | 7.61.0-r0 | — |
| Alpine v3.18 | curl | 7.61.0-r0 | — |
| Alpine v3.17 | curl | 7.61.0-r0 | — |
| Alpine v3.16 | curl | 7.61.0-r0 | — |
| Alpine v3.15 | curl | 7.61.0-r0 | — |
| Alpine v3.14 | curl | 7.61.0-r0 | — |
| Alpine v3.13 | curl | 7.61.0-r0 | — |
| Alpine v3.12 | curl | 7.61.0-r0 | — |
| Alpine v3.11 | curl | 7.61.0-r0 | — |
| Alpine v3.10 | curl | 7.61.0-r0 | — |
| Alpine v3.9 | curl | 7.61.0-r0 | — |
| Alpine v3.8 | curl | 7.61.0-r0 | — |
| Alpine v3.7 | curl | 7.61.0-r0 | — |
| Alpine v3.6 | curl | 7.61.0-r0 | — |
| Alpine v3.5 | curl | 7.61.0-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | curl +2 | 7.55.1-12.amzn2.0.5 | ALAS2-2018-1052 |
Advisories 5
- USN-3710-1 curl vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10582-1 curl-7.79.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2423-1 Security update for curl SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-0266 cURL: Schwachstelle ermöglicht Ausführen von beliebigem Programmcode mit Benutzerrechten BSI CERT-Bund (WID) · Feb 4, 2025
- ALAS2-2018-1052 Moderate: curl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 9, 2018
References
- 1041280 vdb-entry
- https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628
- https://curl.haxx.se/docs/adv_2018-70a2.html
- GLSA-201807-04 vendor-advisory
- RHSA-2018:2486 vendor-advisory
- USN-3710-1 vendor-advisory