Description
Heap-based buffer overflow in PolarSSL 1.x before 1.2.17 and ARM mbed TLS (formerly PolarSSL) 1.3.x before 1.3.14 and 2.x before 2.1.2 allows remote SSL servers to cause a denial of service (client crash) and possibly execute arbitrary code via a long hostname to the server name indication (SNI) extension, which is not properly handled when creating a ClientHello message. NOTE: this identifier has been SPLIT per ADT3 due to different affected version ranges. See CVE-2015-8036 for the session ticket issue that was introduced in 1.3.0.
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 8 | polarssl | 1.3.9-2.1+deb8u1 | DSA-3468-1 |
| Debian 7 | polarssl | 1.2.9-1~deb7u6 | DSA-3468-1 |
| Debian 6.0 | polarssl | 1.2.9-1~deb6u5 | DLA-331-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mbedtls | 2.4.0-1.2 | openSUSE-SU-2024:10088-1 |
| openSUSE Tumbleweed | mbedtls-2 | 2.28.3-1.1 | openSUSE-SU-2024:12903-1 |
| openSUSE Tumbleweed | mbedtls-3 | 3.6.6-1.1 | openSUSE-SU-2026:11119-1 |
Advisories 5
- openSUSE-SU-2026:11119-1 libeverest-3.6.6-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026
- DSA-3468-1 polarssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-331-1 polarssl - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10088-1 libmbedcrypto0-2.4.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12903-1 libmbedcrypto7-2.28.3-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- DSA-3468 vendor-advisory
- https://guidovranken.files.wordpress.com/2015/10/cve-2015-5291.pdf
- https://guidovranken.wordpress.com/2015/10/07/cve-2015-5291/
- FEDORA-2015-30a417bea9 vendor-advisory
- FEDORA-2015-e22bb33731 vendor-advisory
- FEDORA-2015-7f939b3af5 vendor-advisory
- https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2015-01
- openSUSE-SU-2015:2257 vendor-advisory
- GLSA-201706-18 vendor-advisory
- openSUSE-SU-2015:2371 vendor-advisory