CVE catalog

CVE-2021-24115

botan: CVE-2021-24115

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Feb 22, 2021, 2:15:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.92% · Oct 25, 2026

In Botan before 2.17.3, constant-time computations are not used for certain decoding and encoding operations (base32, base58, base64, and hex).

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	botan	trixie	`2.19.5+dfsg-4`	fixed
Debian	botan	bookworm	`2.19.3+dfsg-1+deb12u1`	fixed
Alpine	botan	3.11	`2.11.0-r4`	fixed
Alpine	botan	3.12	`2.11.0-r6`	fixed
Alpine	botan	3.13	`2.11.0-r6`	fixed
Alpine	botan	3.14	`2.17.3-r0`	fixed
Alpine	botan	3.15	`2.17.3-r0`	fixed
Alpine	botan	3.16	`2.17.3-r0`	fixed
Alpine	botan	3.17	`2.17.3-r0`	fixed
Alpine	botan	3.18	`2.17.3-r0`	fixed
Alpine	botan	3.19	`2.17.3-r0`	fixed
Alpine	botan	3.20	`2.17.3-r0`	fixed
Alpine	botan	3.21	`2.17.3-r0`	fixed
Ubuntu	botan1.10	pro	`1.10.5-1`	vulnerable
Ubuntu	botan1.10	pro	`1.10.5-1ubuntu1`	vulnerable
Ubuntu	botan1.10	pro	`1.10.5-1+deb7u1ubuntu0.14.04.1`	vulnerable
Ubuntu	botan1.10	pro	`1.10.5-1+deb7u1ubuntu0.14.04.1+esm1`	vulnerable
Ubuntu	botan1.10	16.04	`1.10.10-6`	vulnerable
Ubuntu	botan1.10	16.04	`1.10.12-1`	vulnerable
Ubuntu	botan	18.04	`2.4.0-3`	vulnerable
Ubuntu	botan	18.04	`2.4.0-4`	vulnerable
Ubuntu	botan	18.04	`2.4.0-5ubuntu1`	vulnerable
Ubuntu	botan1.10	18.04	`1.10.16-1`	vulnerable
Ubuntu	botan1.10	18.04	`1.10.17-0.1`	vulnerable
Ubuntu	botan	20.04	`2.9.0-2`	vulnerable
Ubuntu	botan	20.04	`2.9.0-2build1`	vulnerable
Ubuntu	botan	20.04	`2.12.1-2`	vulnerable
Ubuntu	botan	20.04	`2.12.1-2build1`	vulnerable
Suse	Botan	package hub 15 sp1	`2.10.0-bp152.4.3.1`	fixed
Suse	Botan	package hub 15 sp2	`2.10.0-bp152.4.3.1`	fixed
Opensuse	Botan	leap 15.2	`2.10.0-bp152.4.3.1`	fixed
Suse	Botan	package hub 15 sp2	`2.10.0-bp152.4.6.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	botan	source	trixie	`2.17.3+dfsg-1`	not yet assigned	Not reported	Not reported
Debian	botan	source	bookworm	`2.17.3+dfsg-1`	not yet assigned	Not reported	Not reported
Alpine	botan	apk	3.11	`2.11.0-r4`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.12	`2.11.0-r6`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.13	`2.11.0-r6`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.14	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.15	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.16	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.17	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.18	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.19	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.20	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Alpine	botan	apk	3.21	`2.17.3-r0`	Not reported	ALPINE-CVE-2021-24115	Not reported
Suse	Botan	rpm	package hub 15 sp1	`2.10.0-bp152.4.3.1`	Not reported	OPENSUSE-SU-2021:0765-1	Not reported
Suse	Botan	rpm	package hub 15 sp2	`2.10.0-bp152.4.3.1`	Not reported	OPENSUSE-SU-2021:0765-1	Not reported
Opensuse	Botan	rpm	leap 15.2	`2.10.0-bp152.4.3.1`	Not reported	OPENSUSE-SU-2021:0765-1	Not reported
Suse	Botan	rpm	package hub 15 sp2	`2.10.0-bp152.4.6.1`	Not reported	OPENSUSE-SU-2021:0794-1	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[botan]Unknown
Details (2)
- 2.19.3+dfsg-1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
- 2.19.3+dfsg-1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
[libbotan-2-19]Unknown
Source package: [botan]
Details (2)
- 2.19.3+dfsg-1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
- 2.19.3+dfsg-1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
[libbotan-2-dev]Unknown
Source package: [botan]
Details (2)
- 2.19.3+dfsg-1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
- 2.19.3+dfsg-1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
[libbotan-2-doc]Unknown
Source package: [botan]
Details (2)
- 2.19.3+dfsg-1+deb12u1 · all · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
- 2.19.3+dfsg-1+deb12u1 · all · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
[python3-botan]Unknown
Source package: [botan]
Details (2)
- 2.19.3+dfsg-1+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12
- 2.19.3+dfsg-1+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · bookworm; dsa · botan · debian · 12

[Debian 13 (Trixie)]

[botan]Unknown
Source package: [botan3]
Details (4)
- 3.7.1+dfsg-2 · amd64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 3.7.1+dfsg-2 · arm64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 3.12.0+dfsg-2~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 3.12.0+dfsg-2~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
[libbotan-2-19]Unknown
Source package: [botan]
Details (2)
- 2.19.5+dfsg-4 · amd64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 2.19.5+dfsg-4 · arm64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
[libbotan-2-dev]Unknown
Source package: [botan]
Details (2)
- 2.19.5+dfsg-4 · amd64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 2.19.5+dfsg-4 · arm64 · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
[libbotan-2-doc]Unknown
Source package: [botan]
Details (2)
- 2.19.5+dfsg-4 · all · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13
- 2.19.5+dfsg-4 · all · trixie
  Fixed · Fixed: 2.17.3+dfsg-1
  dsa · botan · debian · 13

Observed: Oct 23, 2026, 5:55:05 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]